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<?xml version="1.0" encoding="iso-8859-1" standalone="no"?>
<!-- Generated by the JDiff Javadoc doclet -->
<!-- (http://www.jdiff.org) -->
<!-- on Sun Dec 04 01:00:08 UTC 2011 -->
<api
xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
xsi:noNamespaceSchemaLocation='api.xsd'
name="hadoop-hdfs 0.22.0"
jdversion="1.0.9">
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<package name="org.apache.hadoop.fs">
<!-- start class org.apache.hadoop.fs.Hdfs -->
<class name="Hdfs" extends="org.apache.hadoop.fs.AbstractFileSystem"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getUriDefaultPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="createInternal" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="createFlag" type="java.util.EnumSet"/>
<param name="absolutePermission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="bufferSize" type="int"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<param name="bytesPerChecksum" type="int"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="recursive" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="getFileBlockLocations" return="org.apache.hadoop.fs.BlockLocation[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<param name="start" type="long"/>
<param name="len" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="getFileChecksum" return="org.apache.hadoop.fs.FileChecksum"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="getFileStatus" return="org.apache.hadoop.fs.FileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="getFileLinkStatus" return="org.apache.hadoop.fs.FileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="getFsStatus" return="org.apache.hadoop.fs.FsStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getServerDefaults" return="org.apache.hadoop.fs.FsServerDefaults"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="listLocatedStatus" return="org.apache.hadoop.fs.RemoteIterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="listStatusIterator" return="org.apache.hadoop.fs.RemoteIterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="listStatus" return="org.apache.hadoop.fs.FileStatus[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="mkdir"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="dir" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="open" return="org.apache.hadoop.fs.FSDataInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="bufferSize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="renameInternal"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="dst" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="renameInternal"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="dst" type="org.apache.hadoop.fs.Path"/>
<param name="overwrite" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="setOwner"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="username" type="java.lang.String"/>
<param name="groupname" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="setPermission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="setReplication" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="replication" type="short"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="setTimes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="mtime" type="long"/>
<param name="atime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="setVerifyChecksum"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="verifyChecksum" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="supportsSymlinks" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="createSymlink"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="org.apache.hadoop.fs.Path"/>
<param name="link" type="org.apache.hadoop.fs.Path"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="getLinkTarget" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
</class>
<!-- end class org.apache.hadoop.fs.Hdfs -->
</package>
<package name="org.apache.hadoop.hdfs">
<!-- start class org.apache.hadoop.hdfs.BlockMissingException -->
<class name="BlockMissingException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockMissingException" type="java.lang.String, java.lang.String, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[An exception that indicates that file was corrupted.
@param filename name of corrupted file
@param description a description of the corruption details]]>
</doc>
</constructor>
<method name="getFile" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the name of the corrupted file.
@return name of corrupted file]]>
</doc>
</method>
<method name="getOffset" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the offset at which this file is corrupted
@return offset of corrupted file]]>
</doc>
</method>
<doc>
<![CDATA[This exception is thrown when a read encounters a block that has no locations
associated with it.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.BlockMissingException -->
<!-- start class org.apache.hadoop.hdfs.BlockReader -->
<class name="BlockReader" extends="org.apache.hadoop.fs.FSInputChecker"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="read" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="buf" type="byte[]"/>
<param name="off" type="int"/>
<param name="len" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="skip" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="n" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="read" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="seekToNewSource" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="targetPos" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="seek"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="pos" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getChunkPosition" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="pos" type="long"/>
</method>
<method name="readChunk" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="pos" type="long"/>
<param name="buf" type="byte[]"/>
<param name="offset" type="int"/>
<param name="len" type="int"/>
<param name="checksumBuf" type="byte[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="newBlockReader" return="org.apache.hadoop.hdfs.BlockReader"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="sock" type="java.net.Socket"/>
<param name="file" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<param name="startOffset" type="long"/>
<param name="len" type="long"/>
<param name="bufferSize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="newBlockReader" return="org.apache.hadoop.hdfs.BlockReader"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="sock" type="java.net.Socket"/>
<param name="file" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<param name="startOffset" type="long"/>
<param name="len" type="long"/>
<param name="bufferSize" type="int"/>
<param name="verifyChecksum" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Java Doc required]]>
</doc>
</method>
<method name="newBlockReader" return="org.apache.hadoop.hdfs.BlockReader"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="sock" type="java.net.Socket"/>
<param name="file" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<param name="startOffset" type="long"/>
<param name="len" type="long"/>
<param name="bufferSize" type="int"/>
<param name="verifyChecksum" type="boolean"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a new BlockReader specifically to satisfy a read.
This method also sends the OP_READ_BLOCK request.
@param sock An established Socket to the DN. The BlockReader will not close it normally
@param file File location
@param block The block object
@param blockToken The block token for security
@param startOffset The read offset, relative to block head
@param len The number of bytes to read
@param bufferSize The IO buffer size (not the client buffer size)
@param verifyChecksum Whether to verify checksum
@param clientName Client name
@return New BlockReader instance, or null on error.]]>
</doc>
</method>
<method name="close"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readAll" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="buf" type="byte[]"/>
<param name="offset" type="int"/>
<param name="len" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[kind of like readFully(). Only reads as much as possible.
And allows use of protected readFully().]]>
</doc>
</method>
<method name="takeSocket" return="java.net.Socket"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Take the socket used to talk to the DN.]]>
</doc>
</method>
<method name="hasSentStatusCode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Whether the BlockReader has reached the end of its input stream
and successfully sent a status code back to the datanode.]]>
</doc>
</method>
<method name="getFileName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="s" type="java.net.InetSocketAddress"/>
<param name="blockId" type="long"/>
</method>
<doc>
<![CDATA[This is a wrapper around connection to datanode
and understands checksum, offset etc.
Terminology:
<dl>
<dt>block</dt>
<dd>The hdfs block, typically large (~64MB).
</dd>
<dt>chunk</dt>
<dd>A block is divided into chunks, each comes with a checksum.
We want transfers to be chunk-aligned, to be able to
verify checksums.
</dd>
<dt>packet</dt>
<dd>A grouping of chunks used for transport. It contains a
header, followed by checksum data, followed by real data.
</dd>
</dl>
Please see DataNode for the RPC specification.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.BlockReader -->
<!-- start class org.apache.hadoop.hdfs.DeprecatedUTF8 -->
<class name="DeprecatedUTF8" extends="org.apache.hadoop.io.UTF8"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DeprecatedUTF8"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DeprecatedUTF8" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Construct from a given string.]]>
</doc>
</constructor>
<constructor name="DeprecatedUTF8" type="org.apache.hadoop.hdfs.DeprecatedUTF8"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Construct from a given string.]]>
</doc>
</constructor>
<method name="readString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="writeString" return="int"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<param name="s" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[A simple wrapper around {@link org.apache.hadoop.io.UTF8}.
This class should be used only when it is absolutely necessary
to use {@link org.apache.hadoop.io.UTF8}. The only difference is that
using this class does not require "@SuppressWarning" annotation to avoid
javac warning. Instead the deprecation is implied in the class name.
This should be treated as package private class to HDFS.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DeprecatedUTF8 -->
<!-- start class org.apache.hadoop.hdfs.DFSClient -->
<class name="DFSClient" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.protocol.FSConstants"/>
<implements name="java.io.Closeable"/>
<constructor name="DFSClient" type="org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="Deprecated at 0.21">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Same as this(NameNode.getAddress(conf), conf);
@see #DFSClient(InetSocketAddress, Configuration)
@deprecated Deprecated at 0.21]]>
</doc>
</constructor>
<constructor name="DFSClient" type="java.net.InetSocketAddress, org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Same as this(nameNodeAddr, conf, null);
@see #DFSClient(InetSocketAddress, Configuration, org.apache.hadoop.fs.FileSystem.Statistics)]]>
</doc>
</constructor>
<constructor name="DFSClient" type="java.net.InetSocketAddress, org.apache.hadoop.conf.Configuration, org.apache.hadoop.fs.FileSystem.Statistics"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Same as this(nameNodeAddr, null, conf, stats);
@see #DFSClient(InetSocketAddress, ClientProtocol, Configuration, org.apache.hadoop.fs.FileSystem.Statistics)]]>
</doc>
</constructor>
<method name="createNamenode" return="org.apache.hadoop.hdfs.protocol.ClientProtocol"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The locking hierarchy is to first acquire lock on DFSClient object, followed by
lock on leasechecker, followed by lock on an individual DFSOutputStream.]]>
</doc>
</method>
<method name="createNamenode" return="org.apache.hadoop.hdfs.protocol.ClientProtocol"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="nameNodeAddr" type="java.net.InetSocketAddress"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="close"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Close the file system, abandoning all of the leases and files being
created and close connections to the namenode.]]>
</doc>
</method>
<method name="getDefaultBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the default block size for this cluster
@return the default block size in bytes]]>
</doc>
</method>
<method name="getBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#getPreferredBlockSize(String)]]>
</doc>
</method>
<method name="getServerDefaults" return="org.apache.hadoop.fs.FsServerDefaults"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get server default values for a number of configuration params.
@see ClientProtocol#getServerDefaults()]]>
</doc>
</method>
<method name="stringifyToken" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[A test method for printing out tokens
@param token
@return Stringify version of the token]]>
</doc>
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="renewer" type="org.apache.hadoop.io.Text"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#getDelegationToken(Text)]]>
</doc>
</method>
<method name="renewDelegationToken" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#renewDelegationToken(Token)]]>
</doc>
</method>
<method name="cancelDelegationToken"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#cancelDelegationToken(Token)]]>
</doc>
</method>
<method name="reportBadBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.LocatedBlock[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Report corrupt blocks that were discovered by the client.
@see ClientProtocol#reportBadBlocks(LocatedBlock[])]]>
</doc>
</method>
<method name="getDefaultReplication" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getBlockLocations" return="org.apache.hadoop.fs.BlockLocation[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="start" type="long"/>
<param name="length" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Get block location info about file
getBlockLocations() returns a list of hostnames that store
data for a specific file region. It returns a set of hostnames
for every block within the indicated region.
This function is very useful when writing code that considers
data-placement when performing operations. For example, the
MapReduce system tries to schedule tasks on the same machines
as the data-block the task processes.]]>
</doc>
</method>
<method name="open" return="org.apache.hadoop.hdfs.DFSInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
</method>
<method name="open" return="org.apache.hadoop.hdfs.DFSInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="Use {@link #open(String, int, boolean)} instead.">
<param name="src" type="java.lang.String"/>
<param name="buffersize" type="int"/>
<param name="verifyChecksum" type="boolean"/>
<param name="stats" type="org.apache.hadoop.fs.FileSystem.Statistics"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Create an input stream that obtains a nodelist from the
namenode, and then reads from all the right places. Creates
inner subclass of InputStream that does the right out-of-band
work.
@deprecated Use {@link #open(String, int, boolean)} instead.]]>
</doc>
</method>
<method name="open" return="org.apache.hadoop.hdfs.DFSInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="buffersize" type="int"/>
<param name="verifyChecksum" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Create an input stream that obtains a nodelist from the
namenode, and then reads from all the right places. Creates
inner subclass of InputStream that does the right out-of-band
work.]]>
</doc>
</method>
<method name="getNamenode" return="org.apache.hadoop.hdfs.protocol.ClientProtocol"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the namenode associated with this DFSClient object
@return the namenode associated with this DFSClient object]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="overwrite" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call {@link #create(String, boolean, short, long, Progressable)} with
default <code>replication</code> and <code>blockSize<code> and null <code>
progress</code>.]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="overwrite" type="boolean"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call {@link #create(String, boolean, short, long, Progressable)} with
default <code>replication</code> and <code>blockSize<code>.]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="overwrite" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call {@link #create(String, boolean, short, long, Progressable)} with
null <code>progress</code>.]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="overwrite" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call {@link #create(String, boolean, short, long, Progressable, int)}
with default bufferSize.]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="overwrite" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<param name="buffersize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call {@link #create(String, FsPermission, EnumSet, short, long,
Progressable, int)} with default <code>permission</code>
{@link FsPermission#getDefault()}.
@param src File name
@param overwrite overwrite an existing file if true
@param replication replication factor for the file
@param blockSize maximum block size
@param progress interface for reporting client progress
@param buffersize underlying buffersize
@return output stream]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="flag" type="java.util.EnumSet"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<param name="buffersize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call {@link #create(String, FsPermission, EnumSet, boolean, short,
long, Progressable, int)} with <code>createParent</code> set to true.]]>
</doc>
</method>
<method name="create" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="flag" type="java.util.EnumSet"/>
<param name="createParent" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<param name="buffersize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a new dfs file with the specified block replication
with write-progress reporting and return an output stream for writing
into the file.
@param src File name
@param permission The permission of the directory being created.
If null, use default permission {@link FsPermission#getDefault()}
@param flag indicates create a new file or create/overwrite an
existing file or append to an existing file
@param createParent create missing parent directory if true
@param replication block replication
@param blockSize maximum block size
@param progress interface for reporting client progress
@param buffersize underlying buffer size
@return output stream
@see ClientProtocol#create(String, FsPermission, String, EnumSetWritable,
boolean, short, long) for detailed description of exceptions thrown]]>
</doc>
</method>
<method name="primitiveCreate" return="java.io.OutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="absPermission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="flag" type="java.util.EnumSet"/>
<param name="createParent" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<param name="buffersize" type="int"/>
<param name="bytesPerChecksum" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Same as {{@link #create(String, FsPermission, EnumSet, short, long,
Progressable, int)} except that the permission
is absolute (ie has already been masked with umask.]]>
</doc>
</method>
<method name="createSymlink"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="java.lang.String"/>
<param name="link" type="java.lang.String"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Creates a symbolic link.
@see ClientProtocol#createSymlink(String, String,FsPermission, boolean)]]>
</doc>
</method>
<method name="getLinkTarget" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Resolve the *first* symlink, if any, in the path.
@see ClientProtocol#getLinkTarget(String)]]>
</doc>
</method>
<method name="setReplication" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="replication" type="short"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set replication for an existing file.
@param src file name
@param replication
@see ClientProtocol#setReplication(String, short)]]>
</doc>
</method>
<method name="rename" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="Use {@link #rename(String, String, Options.Rename...)} instead.">
<param name="src" type="java.lang.String"/>
<param name="dst" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Rename file or directory.
@see ClientProtocol#rename(String, String)
@deprecated Use {@link #rename(String, String, Options.Rename...)} instead.]]>
</doc>
</method>
<method name="concat"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="trg" type="java.lang.String"/>
<param name="srcs" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Move blocks from src to trg and delete src
See {@link ClientProtocol#concat(String, String [])}.]]>
</doc>
</method>
<method name="rename"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="dst" type="java.lang.String"/>
<param name="options" type="org.apache.hadoop.fs.Options.Rename[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Rename file or directory.
@see ClientProtocol#rename(String, String, Options.Rename...)]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Delete file or directory.
See {@link ClientProtocol#delete(String)}.]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="recursive" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[delete file or directory.
delete contents of the directory if non empty and recursive
set to true
@see ClientProtocol#delete(String, boolean)]]>
</doc>
</method>
<method name="exists" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Implemented using getFileInfo(src)]]>
</doc>
</method>
<method name="listPaths" return="org.apache.hadoop.hdfs.protocol.DirectoryListing"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="startAfter" type="byte[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a partial listing of the indicated directory
No block locations need to be fetched]]>
</doc>
</method>
<method name="listPaths" return="org.apache.hadoop.hdfs.protocol.DirectoryListing"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="startAfter" type="byte[]"/>
<param name="needLocation" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a partial listing of the indicated directory
Recommend to use HdfsFileStatus.EMPTY_NAME as startAfter
if the application wants to fetch a listing starting from
the first entry in the directory
@see ClientProtocol#getListing(String, byte[], boolean)]]>
</doc>
</method>
<method name="getFileInfo" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the file info for a specific file or directory.
@param src The string representation of the path to the file
@return object containing information regarding the file
or null if file not found
@see ClientProtocol#getFileInfo(String) for description of exceptions]]>
</doc>
</method>
<method name="getFileLinkInfo" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the file info for a specific file or directory. If src
refers to a symlink then the FileStatus of the link is returned.
@param src path to a file or directory.
For description of exceptions thrown
@see ClientProtocol#getFileLinkInfo(String)]]>
</doc>
</method>
<method name="getFileChecksum" return="org.apache.hadoop.fs.MD5MD5CRC32FileChecksum"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the checksum of a file.
@param src The file path
@return The checksum
@see DistributedFileSystem#getFileChecksum(Path)]]>
</doc>
</method>
<method name="getFileChecksum" return="org.apache.hadoop.fs.MD5MD5CRC32FileChecksum"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="namenode" type="org.apache.hadoop.hdfs.protocol.ClientProtocol"/>
<param name="socketFactory" type="javax.net.SocketFactory"/>
<param name="socketTimeout" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the checksum of a file.
@param src The file path
@return The checksum]]>
</doc>
</method>
<method name="setPermission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set permissions to a file or directory.
@param src path name.
@param permission
@see ClientProtocol#setPermission(String, FsPermission)]]>
</doc>
</method>
<method name="setOwner"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="username" type="java.lang.String"/>
<param name="groupname" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set file or directory owner.
@param src path name.
@param username user id.
@param groupname user group.
@see ClientProtocol#setOwner(String, String, String)]]>
</doc>
</method>
<method name="getDiskStatus" return="org.apache.hadoop.fs.FsStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#getStats()]]>
</doc>
</method>
<method name="getMissingBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns count of blocks with no good replicas left. Normally should be
zero.
@throws IOException]]>
</doc>
</method>
<method name="getUnderReplicatedBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns count of blocks with one of more replica missing.
@throws IOException]]>
</doc>
</method>
<method name="getCorruptBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns count of blocks with at least one replica marked corrupt.
@throws IOException]]>
</doc>
</method>
<method name="datanodeReport" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="type" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setSafeMode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Enter, leave or get safe mode.
@see ClientProtocol#setSafeMode(FSConstants.SafeModeAction)]]>
</doc>
</method>
<method name="refreshNodes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Refresh the hosts and exclude files. (Rereads them.)
See {@link ClientProtocol#refreshNodes()}
for more details.
@see ClientProtocol#refreshNodes()]]>
</doc>
</method>
<method name="metaSave"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="pathname" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Dumps DFS data structures into specified file.
@see ClientProtocol#metaSave(String)]]>
</doc>
</method>
<method name="finalizeUpgrade"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#finalizeUpgrade()]]>
</doc>
</method>
<method name="distributedUpgradeProgress" return="org.apache.hadoop.hdfs.server.common.UpgradeStatusReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@see ClientProtocol#distributedUpgradeProgress(FSConstants.UpgradeAction)]]>
</doc>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a directory (or hierarchy of directories) with the given
name and permission.
@param src The path of the directory being created
@param permission The permission of the directory being created.
If permission == null, use {@link FsPermission#getDefault()}.
@param createParent create missing parent directory if true
@return True if the operation success.
@see ClientProtocol#mkdirs(String, FsPermission, boolean)]]>
</doc>
</method>
<method name="primitiveMkdir" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="absPermission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Same {{@link #mkdirs(String, FsPermission, boolean)} except
that the permissions has already been masked against umask.]]>
</doc>
</method>
<method name="setTimes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="mtime" type="long"/>
<param name="atime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[set the modification and access time of a file
@see ClientProtocol#setTimes(String, long, long)]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="SERVER_DEFAULTS_VALIDITY_PERIOD" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="MAX_BLOCK_ACQUIRE_FAILURES" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[DFSClient can connect to a Hadoop Filesystem and
perform basic file tasks. It uses the ClientProtocol
to communicate with a NameNode daemon, and connects
directly to DataNodes to read/write block data.
Hadoop DFS users should obtain an instance of
DistributedFileSystem, which uses DFSClient to handle
filesystem tasks.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DFSClient -->
<!-- start class org.apache.hadoop.hdfs.DFSClient.DFSDataInputStream -->
<class name="DFSClient.DFSDataInputStream" extends="org.apache.hadoop.fs.FSDataInputStream"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DFSClient.DFSDataInputStream" type="org.apache.hadoop.hdfs.DFSInputStream"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</constructor>
<method name="getCurrentDatanode" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the datanode from which the stream is currently reading.]]>
</doc>
</method>
<method name="getCurrentBlock" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the block containing the target position.]]>
</doc>
</method>
<method name="getVisibleLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@return The visible length of the file.]]>
</doc>
</method>
<doc>
<![CDATA[The Hdfs implementation of {@link FSDataInputStream}]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DFSClient.DFSDataInputStream -->
<!-- start class org.apache.hadoop.hdfs.DFSConfigKeys -->
<class name="DFSConfigKeys" extends="org.apache.hadoop.fs.CommonConfigurationKeys"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DFSConfigKeys"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<field name="DFS_BLOCK_SIZE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_SIZE_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_REPLICATION_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_REPLICATION_DEFAULT" type="short"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_STREAM_BUFFER_SIZE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_STREAM_BUFFER_SIZE_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BYTES_PER_CHECKSUM_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BYTES_PER_CHECKSUM_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_WRITE_PACKET_SIZE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_BACKUP_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_BACKUP_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_BACKUP_HTTP_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_BACKUP_HTTP_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_BACKUP_SERVICE_RPC_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_BALANCE_BANDWIDTHPERSEC_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_BALANCE_BANDWIDTHPERSEC_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HTTP_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HTTP_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SERVICE_RPC_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_MAX_OBJECTS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_MAX_OBJECTS_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SAFEMODE_EXTENSION_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SAFEMODE_EXTENSION_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SAFEMODE_THRESHOLD_PCT_DEFAULT" type="float"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SAFEMODE_MIN_DATANODES_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SAFEMODE_MIN_DATANODES_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SECONDARY_HTTP_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SECONDARY_HTTP_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_CHECKPOINT_PERIOD_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_CHECKPOINT_PERIOD_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_CHECKPOINT_SIZE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_CHECKPOINT_SIZE_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_UPGRADE_PERMISSION_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_UPGRADE_PERMISSION_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HEARTBEAT_RECHECK_INTERVAL_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_HTTPS_KEYSTORE_RESOURCE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_HTTPS_KEYSTORE_RESOURCE_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_HTTPS_NEED_AUTH_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_HTTPS_NEED_AUTH_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_CACHED_CONN_RETRY_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_CACHED_CONN_RETRY_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_SOCKET_CACHE_CAPACITY_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_SOCKET_CACHE_CAPACITY_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_ACCESSTIME_PRECISION_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_ACCESSTIME_PRECISION_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_CONSIDERLOAD_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_CONSIDERLOAD_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_INTERVAL_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_MIN_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_MIN_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_PENDING_TIMEOUT_SEC_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_MAX_STREAMS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_REPLICATION_MAX_STREAMS_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_PERMISSIONS_ENABLED_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_PERMISSIONS_ENABLED_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_PERMISSIONS_SUPERUSERGROUP_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_PERMISSIONS_SUPERUSERGROUP_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_ADMIN" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SERVER_HTTPS_KEYSTORE_RESOURCE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SERVER_HTTPS_KEYSTORE_RESOURCE_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_NAME_DIR_RESTORE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_NAME_DIR_RESTORE_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SUPPORT_ALLOW_FORMAT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SUPPORT_ALLOW_FORMAT_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_LIST_LIMIT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_LIST_LIMIT_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_FAILED_VOLUMES_TOLERATED_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DELEGATION_KEY_UPDATE_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DELEGATION_KEY_UPDATE_INTERVAL_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DELEGATION_TOKEN_RENEW_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DELEGATION_TOKEN_RENEW_INTERVAL_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DELEGATION_TOKEN_MAX_LIFETIME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DELEGATION_TOKEN_MAX_LIFETIME_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DATA_DIR_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HTTPS_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HTTPS_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_NAME_DIR_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_EDITS_DIR_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_READ_PREFETCH_SIZE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_RETRY_WINDOW_BASE" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_METRICS_SESSION_ID_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HOST_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_STORAGEID_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HOSTS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HOSTS_EXCLUDE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_SOCKET_TIMEOUT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_CHECKPOINT_DIR_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_CHECKPOINT_EDITS_DIR_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_BLOCK_WRITE_RETRIES_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_BLOCK_WRITE_RETRIES_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BALANCER_MOVEDWINWIDTH_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BALANCER_MOVEDWINWIDTH_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DATA_DIR_PERMISSION_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DATA_DIR_PERMISSION_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DIRECTORYSCAN_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DIRECTORYSCAN_INTERVAL_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DIRECTORYSCAN_THREADS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DIRECTORYSCAN_THREADS_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DNS_INTERFACE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DNS_INTERFACE_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DNS_NAMESERVER_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DNS_NAMESERVER_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DU_RESERVED_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_DU_RESERVED_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HANDLER_COUNT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HANDLER_COUNT_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HTTP_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HTTP_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_MAX_RECEIVER_THREADS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_MAX_RECEIVER_THREADS_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_NUMBLOCKS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_NUMBLOCKS_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SCAN_PERIOD_HOURS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SCAN_PERIOD_HOURS_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SIMULATEDDATASTORAGE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SIMULATEDDATASTORAGE_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SIMULATEDDATASTORAGE_CAPACITY_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SIMULATEDDATASTORAGE_CAPACITY_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_TRANSFERTO_ALLOWED_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_TRANSFERTO_ALLOWED_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_HEARTBEAT_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_HEARTBEAT_INTERVAL_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DECOMMISSION_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DECOMMISSION_INTERVAL_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_DECOMMISSION_NODES_PER_INTERVAL_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HANDLER_COUNT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_HANDLER_COUNT_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SERVICE_HANDLER_COUNT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_SERVICE_HANDLER_COUNT_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SUPPORT_APPEND_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SUPPORT_APPEND_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_HTTPS_ENABLE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_HTTPS_ENABLE_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DEFAULT_CHUNK_VIEW_SIZE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DEFAULT_CHUNK_VIEW_SIZE_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HTTPS_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_HTTPS_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_IPC_ADDRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_IPC_ADDRESS_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_ACCESS_TOKEN_ENABLE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_ACCESS_TOKEN_ENABLE_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_ACCESS_KEY_UPDATE_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_ACCESS_KEY_UPDATE_INTERVAL_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_ACCESS_TOKEN_LIFETIME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCK_ACCESS_TOKEN_LIFETIME_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_REPLICATION_MAX_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_REPLICATION_MAX_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DF_INTERVAL_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DF_INTERVAL_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCKREPORT_INTERVAL_MSEC_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCKREPORT_INITIAL_DELAY_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_BLOCKREPORT_INITIAL_DELAY_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_IMAGE_COMPRESS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_IMAGE_COMPRESS_DEFAULT" type="boolean"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_IMAGE_COMPRESSION_CODEC_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_IMAGE_COMPRESSION_CODEC_DEFAULT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_IMAGE_TRANSFER_RATE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_IMAGE_TRANSFER_RATE_DEFAULT" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_PLUGINS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_STARTUP_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_PLUGINS_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_WEB_UGI_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_STARTUP_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_KEYTAB_FILE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_DATANODE_USER_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_KEYTAB_FILE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_USER_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_KRB_HTTPS_USER_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SECONDARY_NAMENODE_KEYTAB_FILE_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SECONDARY_NAMENODE_USER_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_SECONDARY_NAMENODE_KRB_HTTPS_USER_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_NAME_CACHE_THRESHOLD_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DFS_NAMENODE_NAME_CACHE_THRESHOLD_DEFAULT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[This class contains constants for configuration keys used
in hdfs.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DFSConfigKeys -->
<!-- start class org.apache.hadoop.hdfs.DFSInputStream -->
<class name="DFSInputStream" extends="org.apache.hadoop.fs.FSInputStream"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getFileLength" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getCurrentDatanode" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the datanode from which the stream is currently reading.]]>
</doc>
</method>
<method name="getCurrentBlock" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the block containing the target position.]]>
</doc>
</method>
<method name="close"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Close it down!]]>
</doc>
</method>
<method name="read" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="read" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="buf" type="byte[]"/>
<param name="off" type="int"/>
<param name="len" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read the entire buffer.]]>
</doc>
</method>
<method name="getBlockReader" return="org.apache.hadoop.hdfs.BlockReader"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="dnAddr" type="java.net.InetSocketAddress"/>
<param name="file" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<param name="startOffset" type="long"/>
<param name="len" type="long"/>
<param name="bufferSize" type="int"/>
<param name="verifyChecksum" type="boolean"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Retrieve a BlockReader suitable for reading.
This method will reuse the cached connection to the DN if appropriate.
Otherwise, it will create a new connection.
@param dnAddr Address of the datanode
@param file File location
@param block The Block object
@param blockToken The access token for security
@param startOffset The read offset, relative to block head
@param len The number of bytes to read
@param bufferSize The IO buffer size (not the client buffer size)
@param verifyChecksum Whether to verify checksum
@param clientName Client name
@return New BlockReader instance]]>
</doc>
</method>
<method name="read" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="position" type="long"/>
<param name="buffer" type="byte[]"/>
<param name="offset" type="int"/>
<param name="length" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read bytes starting from the specified position.
@param position start read from this position
@param buffer read buffer
@param offset offset into buffer
@param length number of bytes to read
@return actual number of bytes read]]>
</doc>
</method>
<method name="skip" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="n" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="seek"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="targetPos" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Seek to a new arbitrary location]]>
</doc>
</method>
<method name="seekToNewSource" return="boolean"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="targetPos" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Seek to given position on a node other than the current node. If
a node other than the current node is found, then returns true.
If another node could not be found, then returns false.]]>
</doc>
</method>
<method name="getPos" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="available" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the size of the remaining available bytes
if the size is less than or equal to {@link Integer#MAX_VALUE},
otherwise, return {@link Integer#MAX_VALUE}.]]>
</doc>
</method>
<method name="markSupported" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[We definitely don't support marks]]>
</doc>
</method>
<method name="mark"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="readLimit" type="int"/>
</method>
<method name="reset"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[DFSInputStream provides bytes from a named file. It handles
negotiation of the namenode and various datanodes as necessary.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DFSInputStream -->
<!-- start class org.apache.hadoop.hdfs.DFSUtil -->
<class name="DFSUtil" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DFSUtil"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="isValidName" return="boolean"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<doc>
<![CDATA[Whether the pathname is valid. Currently prohibits relative paths,
and names which contain a ":" or "/"]]>
</doc>
</method>
<method name="bytes2String" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="bytes" type="byte[]"/>
<doc>
<![CDATA[Converts a byte array to a string using UTF8 encoding.]]>
</doc>
</method>
<method name="string2Bytes" return="byte[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="str" type="java.lang.String"/>
<doc>
<![CDATA[Converts a string to a byte array using UTF8 encoding.]]>
</doc>
</method>
<method name="byteArray2String" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="pathComponents" type="byte[][]"/>
<doc>
<![CDATA[Given a list of path components returns a path as a UTF8 String]]>
</doc>
</method>
<method name="bytes2byteArray" return="byte[][]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="bytes" type="byte[]"/>
<param name="separator" type="byte"/>
<doc>
<![CDATA[Splits the array of bytes into array of arrays of bytes
on byte separator
@param bytes the array of bytes to split
@param separator the delimiting byte]]>
</doc>
</method>
<method name="bytes2byteArray" return="byte[][]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="bytes" type="byte[]"/>
<param name="len" type="int"/>
<param name="separator" type="byte"/>
<doc>
<![CDATA[Splits first len bytes in bytes to array of arrays of bytes
on byte separator
@param bytes the byte array to split
@param len the number of bytes to split
@param separator the delimiting byte]]>
</doc>
</method>
<method name="locatedBlocks2Locations" return="org.apache.hadoop.fs.BlockLocation[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.LocatedBlocks"/>
<doc>
<![CDATA[Convert a LocatedBlocks to BlockLocations[]
@param blocks a LocatedBlocks
@return an array of BlockLocations]]>
</doc>
</method>
</class>
<!-- end class org.apache.hadoop.hdfs.DFSUtil -->
<!-- start class org.apache.hadoop.hdfs.DFSUtil.ErrorSimulator -->
<class name="DFSUtil.ErrorSimulator" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DFSUtil.ErrorSimulator"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="initializeErrorSimulationEvent"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="numberOfEvents" type="int"/>
</method>
<method name="getErrorSimulation" return="boolean"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
</method>
<method name="setErrorSimulation"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
</method>
<method name="clearErrorSimulation"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
</method>
<doc>
<![CDATA[Utility class to facilitate junit test error simulation.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DFSUtil.ErrorSimulator -->
<!-- start class org.apache.hadoop.hdfs.DistributedFileSystem -->
<class name="DistributedFileSystem" extends="org.apache.hadoop.fs.FileSystem"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DistributedFileSystem"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DistributedFileSystem" type="java.net.InetSocketAddress, org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</constructor>
<method name="getUri" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="initialize"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="uri" type="java.net.URI"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="checkPath"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="path" type="org.apache.hadoop.fs.Path"/>
<doc>
<![CDATA[Permit paths which explicitly specify the default port.]]>
</doc>
</method>
<method name="makeQualified" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="org.apache.hadoop.fs.Path"/>
<doc>
<![CDATA[Normalize paths that explicitly specify the default port.]]>
</doc>
</method>
<method name="getWorkingDirectory" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDefaultBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDefaultReplication" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setWorkingDirectory"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="dir" type="org.apache.hadoop.fs.Path"/>
</method>
<method name="getHomeDirectory" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getFileBlockLocations" return="org.apache.hadoop.fs.BlockLocation[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="file" type="org.apache.hadoop.fs.FileStatus"/>
<param name="start" type="long"/>
<param name="len" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getFileBlockLocations" return="org.apache.hadoop.fs.BlockLocation[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<param name="start" type="long"/>
<param name="len" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setVerifyChecksum"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="verifyChecksum" type="boolean"/>
</method>
<method name="recoverLease" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Start the lease recovery of a file
@param f a file
@return true if the file is already closed
@throws IOException if an error occurs]]>
</doc>
</method>
<method name="open" return="org.apache.hadoop.fs.FSDataInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="bufferSize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="append" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="bufferSize" type="int"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[This optional operation is not yet supported.]]>
</doc>
</method>
<method name="create" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="overwrite" type="boolean"/>
<param name="bufferSize" type="int"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="primitiveCreate" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="absolutePermission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="flag" type="java.util.EnumSet"/>
<param name="bufferSize" type="int"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<param name="bytesPerChecksum" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="createNonRecursive" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="flag" type="java.util.EnumSet"/>
<param name="bufferSize" type="int"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Same as create(), except fails if parent directory doesn't already exist.]]>
</doc>
</method>
<method name="setReplication" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="replication" type="short"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="concat"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="trg" type="org.apache.hadoop.fs.Path"/>
<param name="psrcs" type="org.apache.hadoop.fs.Path[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[THIS IS DFS only operations, it is not part of FileSystem
move blocks from srcs to trg
and delete srcs afterwards
all blocks should be the same size
@param trg existing file to append to
@param psrcs list of files (same block size, same replication)
@throws IOException]]>
</doc>
</method>
<method name="rename" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="dst" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="rename"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="dst" type="org.apache.hadoop.fs.Path"/>
<param name="options" type="org.apache.hadoop.fs.Options.Rename[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}
This rename operation is guaranteed to be atomic.]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="recursive" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getContentSummary" return="org.apache.hadoop.fs.ContentSummary"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setQuota"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="namespaceQuota" type="long"/>
<param name="diskspaceQuota" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set a directory's quotas
@see org.apache.hadoop.hdfs.protocol.ClientProtocol#setQuota(String, long, long)]]>
</doc>
</method>
<method name="listStatus" return="org.apache.hadoop.fs.FileStatus[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[List all the entries of a directory
Note that this operation is not atomic for a large directory.
The entries of a directory may be fetched from NameNode multiple times.
It only guarantees that each name occurs once if a directory
undergoes changes between the calls.]]>
</doc>
</method>
<method name="listLocatedStatus" return="org.apache.hadoop.fs.RemoteIterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<param name="filter" type="org.apache.hadoop.fs.PathFilter"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="mkdir" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a directory with given name and permission, only when
parent directory exists.]]>
</doc>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="primitiveMkdir" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="absolutePermission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="close"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getClient" return="org.apache.hadoop.hdfs.DFSClient"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getStatus" return="org.apache.hadoop.fs.FsStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getDiskStatus" return="org.apache.hadoop.hdfs.DistributedFileSystem.DiskStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="Use {@link org.apache.hadoop.fs.FileSystem#getStatus()}
instead">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the disk usage of the filesystem, including total capacity,
used space, and remaining space
@deprecated Use {@link org.apache.hadoop.fs.FileSystem#getStatus()}
instead]]>
</doc>
</method>
<method name="getRawCapacity" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="Use {@link org.apache.hadoop.fs.FileSystem#getStatus()}
instead">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the total raw capacity of the filesystem, disregarding
replication.
@deprecated Use {@link org.apache.hadoop.fs.FileSystem#getStatus()}
instead]]>
</doc>
</method>
<method name="getRawUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="Use {@link org.apache.hadoop.fs.FileSystem#getStatus()}
instead">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the total raw used space in the filesystem, disregarding
replication.
@deprecated Use {@link org.apache.hadoop.fs.FileSystem#getStatus()}
instead]]>
</doc>
</method>
<method name="getMissingBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns count of blocks with no good replicas left. Normally should be
zero.
@throws IOException]]>
</doc>
</method>
<method name="getUnderReplicatedBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns count of blocks with one of more replica missing.
@throws IOException]]>
</doc>
</method>
<method name="getCorruptBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns count of blocks with at least one replica marked corrupt.
@throws IOException]]>
</doc>
</method>
<method name="getDataNodeStats" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return statistics for each datanode.]]>
</doc>
</method>
<method name="setSafeMode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Enter, leave or get safe mode.
@see org.apache.hadoop.hdfs.protocol.ClientProtocol#setSafeMode(
FSConstants.SafeModeAction)]]>
</doc>
</method>
<method name="saveNamespace"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Save namespace image.
@see org.apache.hadoop.hdfs.protocol.ClientProtocol#saveNamespace()]]>
</doc>
</method>
<method name="restoreFailedStorage" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="arg" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<doc>
<![CDATA[enable/disable/check restoreFaileStorage
@see org.apache.hadoop.hdfs.protocol.ClientProtocol#restoreFailedStorage(String arg)]]>
</doc>
</method>
<method name="refreshNodes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Refreshes the list of hosts and excluded hosts from the configured
files.]]>
</doc>
</method>
<method name="finalizeUpgrade"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Finalize previously upgraded files system state.
@throws IOException]]>
</doc>
</method>
<method name="distributedUpgradeProgress" return="org.apache.hadoop.hdfs.server.common.UpgradeStatusReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="metaSave"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="pathname" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getServerDefaults" return="org.apache.hadoop.fs.FsServerDefaults"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="reportChecksumFailure" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="in" type="org.apache.hadoop.fs.FSDataInputStream"/>
<param name="inPos" type="long"/>
<param name="sums" type="org.apache.hadoop.fs.FSDataInputStream"/>
<param name="sumsPos" type="long"/>
<doc>
<![CDATA[We need to find the blocks that didn't match. Likely only one
is corrupt but we will report both to the namenode. In the future,
we can consider figuring out exactly which block is corrupt.]]>
</doc>
</method>
<method name="getFileStatus" return="org.apache.hadoop.fs.FileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the stat information about the file.
@throws FileNotFoundException if the file does not exist.]]>
</doc>
</method>
<method name="getFileChecksum" return="org.apache.hadoop.fs.MD5MD5CRC32FileChecksum"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setPermission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc }]]>
</doc>
</method>
<method name="setOwner"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<param name="username" type="java.lang.String"/>
<param name="groupname" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc }]]>
</doc>
</method>
<method name="setTimes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="org.apache.hadoop.fs.Path"/>
<param name="mtime" type="long"/>
<param name="atime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc }]]>
</doc>
</method>
<method name="getDefaultPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="renewer" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="use {@link #getDelegationToken(String)}">
<param name="renewer" type="org.apache.hadoop.io.Text"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a valid Delegation Token.
@param renewer Name of the designated renewer for the token
@return Token<DelegationTokenIdentifier>
@throws IOException
@deprecated use {@link #getDelegationToken(String)}]]>
</doc>
</method>
<method name="renewDelegationToken" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Renew an existing delegation token.
@param token delegation token obtained earlier
@return the new expiration time
@throws IOException]]>
</doc>
</method>
<method name="cancelDelegationToken"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Cancel an existing delegation token.
@param token delegation token
@throws IOException]]>
</doc>
</method>
<doc>
<![CDATA[Implementation of the abstract FileSystem for the DFS system.
This object is the way end-user code interacts with a Hadoop
DistributedFileSystem.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DistributedFileSystem -->
<!-- start class org.apache.hadoop.hdfs.DistributedFileSystem.DiskStatus -->
<class name="DistributedFileSystem.DiskStatus" extends="org.apache.hadoop.fs.FsStatus"
abstract="false"
static="true" final="false" visibility="public"
deprecated="Use {@link org.apache.hadoop.fs.FsStatus} instead">
<constructor name="DistributedFileSystem.DiskStatus" type="org.apache.hadoop.fs.FsStatus"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DistributedFileSystem.DiskStatus" type="long, long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getDfsUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[@deprecated Use {@link org.apache.hadoop.fs.FsStatus} instead]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.DistributedFileSystem.DiskStatus -->
<!-- start class org.apache.hadoop.hdfs.HdfsConfiguration -->
<class name="HdfsConfiguration" extends="org.apache.hadoop.conf.Configuration"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="HdfsConfiguration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="HdfsConfiguration" type="boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="HdfsConfiguration" type="org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="init"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[This method is here so that when invoked, HdfsConfiguration is class-loaded if
it hasn't already been previously loaded. Upon loading the class, the static
initializer block above will be executed to add the deprecated keys and to add
the default resources. It is safe for this method to be called multiple times
as the static initializer block will only get invoked once.
This replaces the previously, dangerous practice of other classes calling
Configuration.addDefaultResource("hdfs-default.xml") directly without loading
HdfsConfiguration class first, thereby skipping the key deprecation]]>
</doc>
</method>
<doc>
<![CDATA[Adds deprecated keys into the configuration.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.HdfsConfiguration -->
<!-- start class org.apache.hadoop.hdfs.HDFSPolicyProvider -->
<class name="HDFSPolicyProvider" extends="org.apache.hadoop.security.authorize.PolicyProvider"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="HDFSPolicyProvider"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getServices" return="org.apache.hadoop.security.authorize.Service[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[{@link PolicyProvider} for HDFS protocols.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.HDFSPolicyProvider -->
<!-- start class org.apache.hadoop.hdfs.HftpFileSystem -->
<class name="HftpFileSystem" extends="org.apache.hadoop.fs.FileSystem"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="HftpFileSystem"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getDateFormat" return="java.text.SimpleDateFormat"
abstract="false" native="false" synchronized="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDefaultPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</method>
<method name="getCanonicalServiceName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="initialize"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.net.URI"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="renewer" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getUri" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="openConnection" return="java.net.HttpURLConnection"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="query" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Open an HTTP connection to the namenode to read file data and metadata.
@param path The path component of the URL
@param query The query component of the URL]]>
</doc>
</method>
<method name="updateQuery" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="query" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="open" return="org.apache.hadoop.fs.FSDataInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="buffersize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="listStatus" return="org.apache.hadoop.fs.FileStatus[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getFileStatus" return="org.apache.hadoop.fs.FileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getFileChecksum" return="org.apache.hadoop.fs.FileChecksum"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getWorkingDirectory" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setWorkingDirectory"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
</method>
<method name="append" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="bufferSize" type="int"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[This optional operation is not yet supported.]]>
</doc>
</method>
<method name="create" return="org.apache.hadoop.fs.FSDataOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="overwrite" type="boolean"/>
<param name="bufferSize" type="int"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<param name="progress" type="org.apache.hadoop.util.Progressable"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="rename" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="org.apache.hadoop.fs.Path"/>
<param name="dst" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="recursive" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getContentSummary" return="org.apache.hadoop.fs.ContentSummary"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.fs.Path"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<field name="nnAddr" type="java.net.InetSocketAddress"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="ugi" type="org.apache.hadoop.security.UserGroupInformation"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="ran" type="java.util.Random"
transient="false" volatile="false"
static="false" final="true" visibility="protected"
deprecated="not deprecated">
</field>
<field name="HFTP_TIMEZONE" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="HFTP_DATE_FORMAT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="HFTP_SERVICE_NAME_KEY" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="df" type="java.lang.ThreadLocal"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[An implementation of a protocol for accessing filesystems over HTTP.
The following implementation provides a limited, read-only interface
to a filesystem over HTTP.
@see org.apache.hadoop.hdfs.server.namenode.ListPathsServlet
@see org.apache.hadoop.hdfs.server.namenode.FileDataServlet]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.HftpFileSystem -->
<!-- start class org.apache.hadoop.hdfs.HsftpFileSystem -->
<class name="HsftpFileSystem" extends="org.apache.hadoop.hdfs.HftpFileSystem"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="HsftpFileSystem"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="initialize"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.net.URI"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="openConnection" return="java.net.HttpURLConnection"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="query" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getUri" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[An implementation of a protocol for accessing filesystems over HTTPS. The
following implementation provides a limited, read-only interface to a
filesystem over HTTPS.
@see org.apache.hadoop.hdfs.server.namenode.ListPathsServlet
@see org.apache.hadoop.hdfs.server.namenode.FileDataServlet]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.HsftpFileSystem -->
<!-- start class org.apache.hadoop.hdfs.HsftpFileSystem.DummyHostnameVerifier -->
<class name="HsftpFileSystem.DummyHostnameVerifier" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="protected"
deprecated="not deprecated">
<implements name="javax.net.ssl.HostnameVerifier"/>
<constructor name="HsftpFileSystem.DummyHostnameVerifier"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<method name="verify" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="hostname" type="java.lang.String"/>
<param name="session" type="javax.net.ssl.SSLSession"/>
</method>
<doc>
<![CDATA[Dummy hostname verifier that is used to bypass hostname checking]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.HsftpFileSystem.DummyHostnameVerifier -->
<!-- start class org.apache.hadoop.hdfs.HsftpFileSystem.DummyTrustManager -->
<class name="HsftpFileSystem.DummyTrustManager" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="protected"
deprecated="not deprecated">
<implements name="javax.net.ssl.X509TrustManager"/>
<constructor name="HsftpFileSystem.DummyTrustManager"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<method name="checkClientTrusted"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="chain" type="java.security.cert.X509Certificate[]"/>
<param name="authType" type="java.lang.String"/>
</method>
<method name="checkServerTrusted"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="chain" type="java.security.cert.X509Certificate[]"/>
<param name="authType" type="java.lang.String"/>
</method>
<method name="getAcceptedIssuers" return="java.security.cert.X509Certificate[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[Dummy trustmanager that is used to trust all server certificates]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.HsftpFileSystem.DummyTrustManager -->
<doc>
<![CDATA[<p>A distributed implementation of {@link
org.apache.hadoop.fs.FileSystem}. This is loosely modelled after
Google's <a href="http://labs.google.com/papers/gfs.html">GFS</a>.</p>
<p>The most important difference is that unlike GFS, Hadoop DFS files
have strictly one writer at any one time. Bytes are always appended
to the end of the writer's stream. There is no notion of "record appends"
or "mutations" that are then checked or reordered. Writers simply emit
a byte stream. That byte stream is guaranteed to be stored in the
order written.</p>]]>
</doc>
</package>
<package name="org.apache.hadoop.hdfs.protocol">
<!-- start class org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException -->
<class name="AlreadyBeingCreatedException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="AlreadyBeingCreatedException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[The exception that happens when you ask to create a file that already
is being created, but is not closed yet.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException -->
<!-- start class org.apache.hadoop.hdfs.protocol.Block -->
<class name="Block" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<implements name="java.lang.Comparable"/>
<constructor name="Block"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="Block" type="long, long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="Block" type="long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="Block" type="org.apache.hadoop.hdfs.protocol.Block"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="Block" type="java.io.File, long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Find the blockid from the given filename]]>
</doc>
</constructor>
<method name="isBlockFilename" return="boolean"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="java.io.File"/>
</method>
<method name="filename2id" return="long"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="isMetaFilename" return="boolean"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="getGenerationStamp" return="long"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="metaFile" type="java.lang.String"/>
<doc>
<![CDATA[Get generation stamp from the name of the metafile name]]>
</doc>
</method>
<method name="getBlockId" return="long"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="metaFile" type="java.lang.String"/>
<doc>
<![CDATA[Get the blockId from the name of the metafile name]]>
</doc>
</method>
<method name="set"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blkid" type="long"/>
<param name="len" type="long"/>
<param name="genStamp" type="long"/>
</method>
<method name="getBlockId" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setBlockId"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="bid" type="long"/>
</method>
<method name="getBlockName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getNumBytes" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setNumBytes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="len" type="long"/>
</method>
<method name="getGenerationStamp" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setGenerationStamp"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="stamp" type="long"/>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="writeId"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readId"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="compareTo" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="BLOCK_FILE_PREFIX" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="METADATA_EXTENSION" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockFilePattern" type="java.util.regex.Pattern"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="metaFilePattern" type="java.util.regex.Pattern"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[A Block is a Hadoop FS primitive, identified by a
long.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.Block -->
<!-- start class org.apache.hadoop.hdfs.protocol.BlockListAsLongs -->
<class name="BlockListAsLongs" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.lang.Iterable"/>
<constructor name="BlockListAsLongs" type="java.util.List, java.util.List"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create block report from finalized and under construction lists of blocks.
@param finalized - list of finalized blocks
@param uc - list of under construction blocks]]>
</doc>
</constructor>
<constructor name="BlockListAsLongs"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="BlockListAsLongs" type="long[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor
@param iBlockList - BlockListALongs create from this long[] parameter]]>
</doc>
</constructor>
<method name="getBlockListAsLongs" return="long[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="iterator" return="java.util.Iterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns an iterator over blocks in the block report.]]>
</doc>
</method>
<method name="getBlockReportIterator" return="org.apache.hadoop.hdfs.protocol.BlockListAsLongs.BlockReportIterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns {@link BlockReportIterator}.]]>
</doc>
</method>
<method name="getNumberOfBlocks" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The number of blocks
@return - the number of blocks]]>
</doc>
</method>
<method name="getBlockId" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
<doc>
<![CDATA[The block-id of the indexTh block
@param index - the block whose block-id is desired
@return the block-id]]>
</doc>
</method>
<method name="getBlockLen" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
<doc>
<![CDATA[The block-len of the indexTh block
@param index - the block whose block-len is desired
@return - the block-len]]>
</doc>
</method>
<method name="getBlockGenStamp" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
<doc>
<![CDATA[The generation stamp of the indexTh block
@param index - the block whose block-len is desired
@return - the generation stamp]]>
</doc>
</method>
<doc>
<![CDATA[This class provides an interface for accessing list of blocks that
has been implemented as long[].
This class is useful for block report. Rather than send block reports
as a Block[] we can send it as a long[].
The structure of the array is as follows:
0: the length of the finalized replica list;
1: the length of the under-construction replica list;
- followed by finalized replica list where each replica is represented by
3 longs: one for the blockId, one for the block length, and one for
the generation stamp;
- followed by the invalid replica represented with three -1s;
- followed by the under-construction replica list where each replica is
represented by 4 longs: three for the block id, length, generation
stamp, and the forth for the replica state.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.BlockListAsLongs -->
<!-- start class org.apache.hadoop.hdfs.protocol.BlockListAsLongs.BlockReportIterator -->
<class name="BlockListAsLongs.BlockReportIterator" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.util.Iterator"/>
<method name="hasNext" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="next" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="remove"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getCurrentReplicaState" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the state of the current replica.
The state corresponds to the replica returned
by the latest {@link #next()}.]]>
</doc>
</method>
<doc>
<![CDATA[Iterates over blocks in the block report.
Avoids object allocation on each iteration.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.BlockListAsLongs.BlockReportIterator -->
<!-- start interface org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol -->
<interface name="ClientDatanodeProtocol" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.ipc.VersionedProtocol"/>
<method name="getReplicaVisibleLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the visible length of a replica.]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="versionID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[6: recoverBlock() removed.]]>
</doc>
</field>
<doc>
<![CDATA[An client-datanode protocol for block recovery]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol -->
<!-- start interface org.apache.hadoop.hdfs.protocol.ClientProtocol -->
<interface name="ClientProtocol" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.ipc.VersionedProtocol"/>
<method name="getBlockLocations" return="org.apache.hadoop.hdfs.protocol.LocatedBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="offset" type="long"/>
<param name="length" type="long"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get locations of the blocks of the specified file within the specified range.
DataNode locations for each block are sorted by
the proximity to the client.
<p>
Return {@link LocatedBlocks} which contains
file length, blocks and their locations.
DataNode locations for each block are sorted by
the distance to the client's address.
<p>
The client will then have to contact
one of the indicated DataNodes to obtain the actual data.
@param src file name
@param offset range start offset
@param length range length
@return file length and array of blocks with their locations
@throws AccessControlException If access is denied
@throws FileNotFoundException If file <code>src</code> does not exist
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="getServerDefaults" return="org.apache.hadoop.fs.FsServerDefaults"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get server default values for a number of configuration params.
@return a set of server default configuration values
@throws IOException]]>
</doc>
</method>
<method name="create"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="masked" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="clientName" type="java.lang.String"/>
<param name="flag" type="org.apache.hadoop.io.EnumSetWritable"/>
<param name="createParent" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="AlreadyBeingCreatedException" type="org.apache.hadoop.hdfs.protocol.AlreadyBeingCreatedException"/>
<exception name="DSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.DSQuotaExceededException"/>
<exception name="FileAlreadyExistsException" type="org.apache.hadoop.fs.FileAlreadyExistsException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="NSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.NSQuotaExceededException"/>
<exception name="ParentNotDirectoryException" type="org.apache.hadoop.fs.ParentNotDirectoryException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a new file entry in the namespace.
<p>
This will create an empty file specified by the source path.
The path should reflect a full path originated at the root.
The name-node does not have a notion of "current" directory for a client.
<p>
Once created, the file is visible and available for read to other clients.
Although, other clients cannot {@link #delete(String, boolean)}, re-create or
{@link #rename(String, String)} it until the file is completed
or explicitly as a result of lease expiration.
<p>
Blocks have a maximum size. Clients that intend to create
multi-block files must also use
{@link #addBlock(String, String, Block, DatanodeInfo[])}
@param src path of the file being created.
@param masked masked permission.
@param clientName name of the current client.
@param flag indicates whether the file should be
overwritten if it already exists or create if it does not exist or append.
@param createParent create missing parent directory if true
@param replication block replication factor.
@param blockSize maximum block size.
@throws AccessControlException If access is denied
@throws AlreadyBeingCreatedException if the path does not exist.
@throws DSQuotaExceededException If file creation violates disk space
quota restriction
@throws FileAlreadyExistsException If file <code>src</code> already exists
@throws FileNotFoundException If parent of <code>src</code> does not exist
and <code>createParent</code> is false
@throws ParentNotDirectoryException If parent of <code>src</code> is not a
directory.
@throws NSQuotaExceededException If file creation violates name space
quota restriction
@throws SafeModeException create not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred
RuntimeExceptions:
@throws InvalidPathException Path <code>src</code> is invalid]]>
</doc>
</method>
<method name="append" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="DSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.DSQuotaExceededException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Append to the end of the file.
@param src path of the file being created.
@param clientName name of the current client.
@return information about the last partial block if any.
@throws AccessControlException if permission to append file is
denied by the system. As usually on the client side the exception will
be wrapped into {@link org.apache.hadoop.ipc.RemoteException}.
Allows appending to an existing file if the server is
configured with the parameter dfs.support.append set to true, otherwise
throws an IOException.
@throws AccessControlException If permission to append to file is denied
@throws FileNotFoundException If file <code>src</code> is not found
@throws DSQuotaExceededException If append violates disk space quota
restriction
@throws SafeModeException append not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred.
RuntimeExceptions:
@throws UnsupportedOperationException if append is not supported]]>
</doc>
</method>
<method name="setReplication" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="replication" type="short"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="DSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.DSQuotaExceededException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set replication for an existing file.
<p>
The NameNode sets replication to the new value and returns.
The actual block replication is not expected to be performed during
this method call. The blocks will be populated or removed in the
background as the result of the routine block maintenance procedures.
@param src file name
@param replication new replication
@return true if successful;
false if file does not exist or is a directory
@throws AccessControlException If access is denied
@throws DSQuotaExceededException If replication violates disk space
quota restriction
@throws FileNotFoundException If file <code>src</code> is not found
@throws SafeModeException not allowed in safemode
@throws UnresolvedLinkException if <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="setPermission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set permissions for an existing file/directory.
@throws AccessControlException If access is denied
@throws FileNotFoundException If file <code>src</code> is not found
@throws SafeModeException not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="setOwner"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="username" type="java.lang.String"/>
<param name="groupname" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set Owner of a path (i.e. a file or a directory).
The parameters username and groupname cannot both be null.
@param src
@param username If it is null, the original username remains unchanged.
@param groupname If it is null, the original groupname remains unchanged.
@throws AccessControlException If access is denied
@throws FileNotFoundException If file <code>src</code> is not found
@throws SafeModeException not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="abandonBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="src" type="java.lang.String"/>
<param name="holder" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client can give up on a blcok by calling abandonBlock().
The client can then
either obtain a new block, or complete or abandon the file.
Any partial writes to the block will be discarded.
@throws AccessControlException If access is denied
@throws FileNotFoundException file <code>src</code> is not found
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="addBlock" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<param name="previous" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="excludeNodes" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="NotReplicatedYetException" type="org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[A client that wants to write an additional block to the
indicated filename (which must currently be open for writing)
should call addBlock().
addBlock() allocates a new block and datanodes the block data
should be replicated to.
addBlock() also commits the previous block by reporting
to the name-node the actual generation stamp and the length
of the block that the client has transmitted to data-nodes.
@param src the file being created
@param clientName the name of the client that adds the block
@param previous previous block
@param excludeNodes a list of nodes that should not be
allocated for the current block
@return LocatedBlock allocated block information.
@throws AccessControlException If access is denied
@throws FileNotFoundException If file <code>src</code> is not found
@throws NotReplicatedYetException previous blocks of the file are not
replicated yet. Blocks cannot be added until replication
completes.
@throws SafeModeException create not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="complete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<param name="last" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client is done writing data to the given filename, and would
like to complete it.
The function returns whether the file has been closed successfully.
If the function returns false, the caller should try again.
close() also commits the last block of the file by reporting
to the name-node the actual generation stamp and the length
of the block that the client has transmitted to data-nodes.
A call to complete() will not return true until all the file's
blocks have been replicated the minimum number of times. Thus,
DataNode failures may cause a client to call complete() several
times before succeeding.
@throws AccessControlException If access is denied
@throws FileNotFoundException If file <code>src</code> is not found
@throws SafeModeException create not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="reportBadBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.LocatedBlock[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client wants to report corrupted blocks (blocks with specified
locations on datanodes).
@param blocks Array of located blocks to report]]>
</doc>
</method>
<method name="rename" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="Use {@link #rename(String, String, Options.Rename...)} instead.">
<param name="src" type="java.lang.String"/>
<param name="dst" type="java.lang.String"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Rename an item in the file system namespace.
@param src existing file or directory name.
@param dst new name.
@return true if successful, or false if the old name does not exist
or if the new name already belongs to the namespace.
@throws IOException an I/O error occurred
@deprecated Use {@link #rename(String, String, Options.Rename...)} instead.]]>
</doc>
</method>
<method name="concat"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="trg" type="java.lang.String"/>
<param name="srcs" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Moves blocks from srcs to trg and delete srcs
@param trg existing file
@param srcs - list of existing files (same block size, same replication)
@throws IOException if some arguments are invalid
@throws UnresolvedLinkException if <code>trg</code> or <code>srcs</code>
contains a symlink]]>
</doc>
</method>
<method name="rename"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="dst" type="java.lang.String"/>
<param name="options" type="org.apache.hadoop.fs.Options.Rename[]"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="DSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.DSQuotaExceededException"/>
<exception name="FileAlreadyExistsException" type="org.apache.hadoop.fs.FileAlreadyExistsException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="NSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.NSQuotaExceededException"/>
<exception name="ParentNotDirectoryException" type="org.apache.hadoop.fs.ParentNotDirectoryException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Rename src to dst.
<ul>
<li>Fails if src is a file and dst is a directory.
<li>Fails if src is a directory and dst is a file.
<li>Fails if the parent of dst does not exist or is a file.
</ul>
<p>
Without OVERWRITE option, rename fails if the dst already exists.
With OVERWRITE option, rename overwrites the dst, if it is a file
or an empty directory. Rename fails if dst is a non-empty directory.
<p>
This implementation of rename is atomic.
<p>
@param src existing file or directory name.
@param dst new name.
@param options Rename options
@throws AccessControlException If access is denied
@throws DSQuotaExceededException If rename violates disk space
quota restriction
@throws FileAlreadyExistsException If <code>dst</code> already exists and
<code>options</options> has {@link Rename#OVERWRITE} option
false.
@throws FileNotFoundException If <code>src</code> does not exist
@throws NSQuotaExceededException If rename violates namespace
quota restriction
@throws ParentNotDirectoryException If parent of <code>dst</code>
is not a directory
@throws SafeModeException rename not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> or
<code>dst</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="use {@link #delete(String, boolean)} istead.">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Delete the given file or directory from the file system.
<p>
Any blocks belonging to the deleted files will be garbage-collected.
@param src existing name.
@return true only if the existing file or directory was actually removed
from the file system.
@throws UnresolvedLinkException if <code>src</code> contains a symlink.
@deprecated use {@link #delete(String, boolean)} istead.]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="recursive" type="boolean"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Delete the given file or directory from the file system.
<p>
same as delete but provides a way to avoid accidentally
deleting non empty directories programmatically.
@param src existing name
@param recursive if true deletes a non empty directory recursively,
else throws an exception.
@return true only if the existing file or directory was actually removed
from the file system.
@throws AccessControlException If access is denied
@throws FileNotFoundException If file <code>src</code> is not found
@throws SafeModeException create not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="masked" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="createParent" type="boolean"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileAlreadyExistsException" type="org.apache.hadoop.fs.FileAlreadyExistsException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="NSQuotaExceededException" type="org.apache.hadoop.hdfs.protocol.NSQuotaExceededException"/>
<exception name="ParentNotDirectoryException" type="org.apache.hadoop.fs.ParentNotDirectoryException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a directory (or hierarchy of directories) with the given
name and permission.
@param src The path of the directory being created
@param masked The masked permission of the directory being created
@param createParent create missing parent directory if true
@return True if the operation success.
@throws AccessControlException If access is denied
@throws FileAlreadyExistsException If <code>src</code> already exists
@throws FileNotFoundException If parent of <code>src</code> does not exist
and <code>createParent</code> is false
@throws NSQuotaExceededException If file creation violates quota restriction
@throws ParentNotDirectoryException If parent of <code>src</code>
is not a directory
@throws SafeModeException create not allowed in safemode
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred.
RunTimeExceptions:
@throws InvalidPathException If <code>src</code> is invalid]]>
</doc>
</method>
<method name="getListing" return="org.apache.hadoop.hdfs.protocol.DirectoryListing"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="startAfter" type="byte[]"/>
<param name="needLocation" type="boolean"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a partial listing of the indicated directory
@param src the directory name
@param startAfter the name to start listing after encoded in java UTF8
@param needLocation if the FileStatus should contain block locations
@return a partial listing starting after startAfter
@throws AccessControlException permission denied
@throws FileNotFoundException file <code>src</code> is not found
@throws UnresolvedLinkException If <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="renewLease"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="clientName" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Client programs can cause stateful changes in the NameNode
that affect other clients. A client may obtain a file and
neither abandon nor complete it. A client might hold a series
of locks that prevent other clients from proceeding.
Clearly, it would be bad if a client held a bunch of locks
that it never gave up. This can happen easily if the client
dies unexpectedly.
<p>
So, the NameNode will revoke the locks and live file-creates
for clients that it thinks have died. A client tells the
NameNode that it is still alive by periodically calling
renewLease(). If a certain amount of time passes since
the last call to renewLease(), the NameNode assumes the
client has died.
@throws AccessControlException permission denied
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="recoverLease" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Start lease recovery.
Lightweight NameNode operation to trigger lease recovery
@param src path of the file to start lease recovery
@param clientName name of the current client
@return true if the file is already closed
@throws IOException]]>
</doc>
</method>
<method name="getStats" return="long[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a set of statistics about the filesystem.
Right now, only three values are returned.
<ul>
<li> [0] contains the total storage capacity of the system, in bytes.</li>
<li> [1] contains the total used space of the system, in bytes.</li>
<li> [2] contains the available storage of the system, in bytes.</li>
<li> [3] contains number of under replicated blocks in the system.</li>
<li> [4] contains number of blocks with a corrupt replica. </li>
<li> [5] contains number of blocks without any good replicas left. </li>
</ul>
Use public constants like {@link #GET_STATS_CAPACITY_IDX} in place of
actual numbers to index into the array.]]>
</doc>
</method>
<method name="getDatanodeReport" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="type" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a report on the system's current datanodes.
One DatanodeInfo object is returned for each DataNode.
Return live datanodes if type is LIVE; dead datanodes if type is DEAD;
otherwise all datanodes if type is ALL.]]>
</doc>
</method>
<method name="getPreferredBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="filename" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Get the block size for the given file.
@param filename The name of the file
@return The number of bytes in each block
@throws IOException
@throws UnresolvedLinkException if the path contains a symlink.]]>
</doc>
</method>
<method name="setSafeMode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Enter, leave or get safe mode.
<p>
Safe mode is a name node state when it
<ol><li>does not accept changes to name space (read-only), and</li>
<li>does not replicate or delete blocks.</li></ol>
<p>
Safe mode is entered automatically at name node startup.
Safe mode can also be entered manually using
{@link #setSafeMode(FSConstants.SafeModeAction) setSafeMode(SafeModeAction.SAFEMODE_GET)}.
<p>
At startup the name node accepts data node reports collecting
information about block locations.
In order to leave safe mode it needs to collect a configurable
percentage called threshold of blocks, which satisfy the minimal
replication condition.
The minimal replication condition is that each block must have at least
<tt>dfs.namenode.replication.min</tt> replicas.
When the threshold is reached the name node extends safe mode
for a configurable amount of time
to let the remaining data nodes to check in before it
will start replicating missing blocks.
Then the name node leaves safe mode.
<p>
If safe mode is turned on manually using
{@link #setSafeMode(FSConstants.SafeModeAction) setSafeMode(SafeModeAction.SAFEMODE_ENTER)}
then the name node stays in safe mode until it is manually turned off
using {@link #setSafeMode(FSConstants.SafeModeAction) setSafeMode(SafeModeAction.SAFEMODE_LEAVE)}.
Current state of the name node can be verified using
{@link #setSafeMode(FSConstants.SafeModeAction) setSafeMode(SafeModeAction.SAFEMODE_GET)}
<h4>Configuration parameters:</h4>
<tt>dfs.safemode.threshold.pct</tt> is the threshold parameter.<br>
<tt>dfs.safemode.extension</tt> is the safe mode extension parameter.<br>
<tt>dfs.namenode.replication.min</tt> is the minimal replication parameter.
<h4>Special cases:</h4>
The name node does not enter safe mode at startup if the threshold is
set to 0 or if the name space is empty.<br>
If the threshold is set to 1 then all blocks need to have at least
minimal replication.<br>
If the threshold value is greater than 1 then the name node will not be
able to turn off safe mode automatically.<br>
Safe mode can always be turned off manually.
@param action <ul> <li>0 leave safe mode;</li>
<li>1 enter safe mode;</li>
<li>2 get safe mode state.</li></ul>
@return <ul><li>0 if the safe mode is OFF or</li>
<li>1 if the safe mode is ON.</li></ul>
@throws IOException]]>
</doc>
</method>
<method name="saveNamespace"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Save namespace image.
<p>
Saves current namespace into storage directories and reset edits log.
Requires superuser privilege and safe mode.
@throws AccessControlException if the superuser privilege is violated.
@throws IOException if image creation failed.]]>
</doc>
</method>
<method name="restoreFailedStorage" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="arg" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<doc>
<![CDATA[Enable/Disable restore failed storage.
<p>
sets flag to enable restore of failed storage replicas
@throws AccessControlException if the superuser privilege is violated.]]>
</doc>
</method>
<method name="refreshNodes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Tells the namenode to reread the hosts and exclude files.
@throws IOException]]>
</doc>
</method>
<method name="finalizeUpgrade"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Finalize previous upgrade.
Remove file system state saved during the upgrade.
The upgrade will become irreversible.
@throws IOException]]>
</doc>
</method>
<method name="distributedUpgradeProgress" return="org.apache.hadoop.hdfs.server.common.UpgradeStatusReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Report distributed upgrade progress or force current upgrade to proceed.
@param action {@link FSConstants.UpgradeAction} to perform
@return upgrade status information or null if no upgrades are in progress
@throws IOException]]>
</doc>
</method>
<method name="metaSave"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="filename" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Dumps namenode data structures into specified file. If the file
already exists, then append.
@throws IOException]]>
</doc>
</method>
<method name="getFileInfo" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the file info for a specific file or directory.
@param src The string representation of the path to the file
@return object containing information regarding the file
or null if file not found
@throws AccessControlException permission denied
@throws FileNotFoundException file <code>src</code> is not found
@throws UnresolvedLinkException if the path contains a symlink.
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="getFileLinkInfo" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the file info for a specific file or directory. If the path
refers to a symlink then the FileStatus of the symlink is returned.
@param src The string representation of the path to the file
@return object containing information regarding the file
or null if file not found
@throws AccessControlException permission denied
@throws UnresolvedLinkException if <code>src</code> contains a symlink
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="getContentSummary" return="org.apache.hadoop.fs.ContentSummary"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get {@link ContentSummary} rooted at the specified directory.
@param path The string representation of the path
@throws AccessControlException permission denied
@throws FileNotFoundException file <code>path</code> is not found
@throws UnresolvedLinkException if <code>path</code> contains a symlink.
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="setQuota"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="namespaceQuota" type="long"/>
<param name="diskspaceQuota" type="long"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set the quota for a directory.
@param path The string representation of the path to the directory
@param namespaceQuota Limit on the number of names in the tree rooted
at the directory
@param diskspaceQuota Limit on disk space occupied all the files under
this directory.
<br><br>
The quota can have three types of values : (1) 0 or more will set
the quota to that value, (2) {@link FSConstants#QUOTA_DONT_SET} implies
the quota will not be changed, and (3) {@link FSConstants#QUOTA_RESET}
implies the quota will be reset. Any other value is a runtime error.
@throws AccessControlException permission denied
@throws FileNotFoundException file <code>path</code> is not found
@throws QuotaExceededException if the directory size
is greater than the given quota
@throws UnresolvedLinkException if the <code>path</code> contains a symlink.
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="fsync"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="client" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write all metadata for this file into persistent storage.
The file must be currently open for writing.
@param src The string representation of the path
@param client The string representation of the client
@throws AccessControlException permission denied
@throws FileNotFoundException file <code>src</code> is not found
@throws UnresolvedLinkException if <code>src</code> contains a symlink.
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="setTimes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="mtime" type="long"/>
<param name="atime" type="long"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Sets the modification and access time of the file to the specified time.
@param src The string representation of the path
@param mtime The number of milliseconds since Jan 1, 1970.
Setting mtime to -1 means that modification time should not be set
by this call.
@param atime The number of milliseconds since Jan 1, 1970.
Setting atime to -1 means that access time should not be set
by this call.
@throws AccessControlException permission denied
@throws FileNotFoundException file <code>src</code> is not found
@throws UnresolvedLinkException if <code>src</code> contains a symlink.
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="createSymlink"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="java.lang.String"/>
<param name="link" type="java.lang.String"/>
<param name="dirPerm" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="createParent" type="boolean"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileAlreadyExistsException" type="org.apache.hadoop.fs.FileAlreadyExistsException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="ParentNotDirectoryException" type="org.apache.hadoop.fs.ParentNotDirectoryException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create symlink to a file or directory.
@param target The path of the destination that the
link points to.
@param link The path of the link being created.
@param dirPerm permissions to use when creating parent directories
@param createParent - if true then missing parent dirs are created
if false then parent must exist
@throws AccessControlException permission denied
@throws FileAlreadyExistsException If file <code>link</code> already exists
@throws FileNotFoundException If parent of <code>link</code> does not exist
and <code>createParent</code> is false
@throws ParentNotDirectoryException If parent of <code>link</code> is not a
directory.
@throws UnresolvedLinkException if <code>link</target> contains a symlink.
@throws IOException If an I/O error occurred]]>
</doc>
</method>
<method name="getLinkTarget" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the target of the given symlink. If there is an intermediate
symlink in the path (ie a symlink leading up to the final path component)
then the given path is returned with this symlink resolved.
@param path The path with a link that needs resolution.
@return The path after resolving the first symbolic link in the path.
@throws AccessControlException permission denied
@throws FileNotFoundException If <code>path</code> does not exist
@throws IOException If the given path does not refer to a symlink
or an I/O error occurred]]>
</doc>
</method>
<method name="updateBlockForPipeline" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a new generation stamp together with an access token for
a block under construction
This method is called only when a client needs to recover a failed
pipeline or set up a pipeline for appending to a block.
@param block a block
@param clientName the name of the client
@return a located block with a new generation stamp and an access token
@throws IOException if any error occurs]]>
</doc>
</method>
<method name="updatePipeline"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="clientName" type="java.lang.String"/>
<param name="oldBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newNodes" type="org.apache.hadoop.hdfs.protocol.DatanodeID[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update a pipeline for a block under construction
@param clientName the name of the client
@param oldBlock the old block
@param newBlock the new block containing new generation stamp and length
@param newNodes datanodes in the pipeline
@throws IOException if any error occurs]]>
</doc>
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="renewer" type="org.apache.hadoop.io.Text"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a valid Delegation Token.
@param renewer the designated renewer for the token
@return Token<DelegationTokenIdentifier>
@throws IOException]]>
</doc>
</method>
<method name="renewDelegationToken" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Renew an existing delegation token.
@param token delegation token obtained earlier
@return the new expiration time
@throws IOException]]>
</doc>
</method>
<method name="cancelDelegationToken"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Cancel an existing delegation token.
@param token delegation token
@throws IOException]]>
</doc>
</method>
<field name="versionID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Compared to the previous version the following changes have been introduced:
(Only the latest change is reflected.
The log of historical changes can be retrieved from the svn).
65: recoverLease return if the file is closed or not]]>
</doc>
</field>
<field name="GET_STATS_CAPACITY_IDX" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="GET_STATS_USED_IDX" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="GET_STATS_REMAINING_IDX" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="GET_STATS_UNDER_REPLICATED_IDX" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="GET_STATS_CORRUPT_BLOCKS_IDX" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="GET_STATS_MISSING_BLOCKS_IDX" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[ClientProtocol is used by user code via
{@link org.apache.hadoop.hdfs.DistributedFileSystem} class to communicate
with the NameNode. User code can manipulate the directory namespace,
as well as open/close file streams, etc.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.protocol.ClientProtocol -->
<!-- start class org.apache.hadoop.hdfs.protocol.DatanodeID -->
<class name="DatanodeID" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.WritableComparable"/>
<constructor name="DatanodeID"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Equivalent to DatanodeID("").]]>
</doc>
</constructor>
<constructor name="DatanodeID" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Equivalent to DatanodeID(nodeName, "", -1, -1).]]>
</doc>
</constructor>
<constructor name="DatanodeID" type="org.apache.hadoop.hdfs.protocol.DatanodeID"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[DatanodeID copy constructor
@param from]]>
</doc>
</constructor>
<constructor name="DatanodeID" type="java.lang.String, java.lang.String, int, int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create DatanodeID
@param nodeName (hostname:portNumber)
@param storageID data storage ID
@param infoPort info server port
@param ipcPort ipc server port]]>
</doc>
</constructor>
<method name="getName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return hostname:portNumber.]]>
</doc>
</method>
<method name="getStorageID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return data storage ID.]]>
</doc>
</method>
<method name="getInfoPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return infoPort (the port at which the HTTP server bound to)]]>
</doc>
</method>
<method name="getIpcPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return ipcPort (the port at which the IPC server bound to)]]>
</doc>
</method>
<method name="setStorageID"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="storageID" type="java.lang.String"/>
<doc>
<![CDATA[sets the data storage ID.]]>
</doc>
</method>
<method name="getHost" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return hostname and no :portNumber.]]>
</doc>
</method>
<method name="getPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="to" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="updateRegInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<doc>
<![CDATA[Update fields when a new registration request comes in.
Note that this does not update storageID.]]>
</doc>
</method>
<method name="compareTo" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="that" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<doc>
<![CDATA[Comparable.
Basis of compare is the String name (host:portNumber) only.
@param that
@return as specified by Comparable.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<field name="EMPTY_ARRAY" type="org.apache.hadoop.hdfs.protocol.DatanodeID[]"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="name" type="java.lang.String"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="storageID" type="java.lang.String"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="infoPort" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="ipcPort" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[DatanodeID is composed of the data node
name (hostname:portNumber) and the data storage ID,
which it currently represents.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DatanodeID -->
<!-- start class org.apache.hadoop.hdfs.protocol.DatanodeInfo -->
<class name="DatanodeInfo" extends="org.apache.hadoop.hdfs.protocol.DatanodeID"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.net.Node"/>
<constructor name="DatanodeInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DatanodeInfo" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DatanodeInfo" type="org.apache.hadoop.hdfs.protocol.DatanodeID"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DatanodeInfo" type="org.apache.hadoop.hdfs.protocol.DatanodeID, java.lang.String, java.lang.String"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<method name="getCapacity" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The raw capacity.]]>
</doc>
</method>
<method name="getDfsUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The used space by the data node.]]>
</doc>
</method>
<method name="getNonDfsUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The used space by the data node.]]>
</doc>
</method>
<method name="getDfsUsedPercent" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The used space by the data node as percentage of present capacity]]>
</doc>
</method>
<method name="getRemaining" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The raw free space.]]>
</doc>
</method>
<method name="getRemainingPercent" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The remaining space as percentage of configured capacity.]]>
</doc>
</method>
<method name="getLastUpdate" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The time when this information was accurate.]]>
</doc>
</method>
<method name="getXceiverCount" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[number of active connections]]>
</doc>
</method>
<method name="setCapacity"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="capacity" type="long"/>
<doc>
<![CDATA[Sets raw capacity.]]>
</doc>
</method>
<method name="setRemaining"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="remaining" type="long"/>
<doc>
<![CDATA[Sets raw free space.]]>
</doc>
</method>
<method name="setLastUpdate"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="lastUpdate" type="long"/>
<doc>
<![CDATA[Sets time when this information was accurate.]]>
</doc>
</method>
<method name="setXceiverCount"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="xceiverCount" type="int"/>
<doc>
<![CDATA[Sets number of active connections]]>
</doc>
</method>
<method name="getNetworkLocation" return="java.lang.String"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[rack name]]>
</doc>
</method>
<method name="setNetworkLocation"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="location" type="java.lang.String"/>
<doc>
<![CDATA[Sets the rack name]]>
</doc>
</method>
<method name="getHostName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setHostName"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="host" type="java.lang.String"/>
</method>
<method name="getDatanodeReport" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[A formatted string for reporting the status of the DataNode.]]>
</doc>
</method>
<method name="dumpDatanode" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[A formatted string for printing the status of the DataNode.]]>
</doc>
</method>
<method name="startDecommission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Start decommissioning a node.
old state.]]>
</doc>
</method>
<method name="stopDecommission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Stop decommissioning a node.
old state.]]>
</doc>
</method>
<method name="isDecommissionInProgress" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns true if the node is in the process of being decommissioned]]>
</doc>
</method>
<method name="isDecommissioned" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns true if the node has been decommissioned.]]>
</doc>
</method>
<method name="setDecommissioned"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Sets the admin state to indicate that decommission is complete.]]>
</doc>
</method>
<method name="setAdminState"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="newState" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates"/>
<doc>
<![CDATA[Sets the admin state of this node.]]>
</doc>
</method>
<method name="getParent" return="org.apache.hadoop.net.Node"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return this node's parent]]>
</doc>
</method>
<method name="setParent"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="parent" type="org.apache.hadoop.net.Node"/>
</method>
<method name="getLevel" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return this node's level in the tree.
E.g. the root of a tree returns 0 and its children return 1]]>
</doc>
</method>
<method name="setLevel"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="level" type="int"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="read" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read a DatanodeInfo]]>
</doc>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="obj" type="java.lang.Object"/>
</method>
<field name="capacity" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="dfsUsed" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="remaining" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="lastUpdate" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="xceiverCount" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="location" type="java.lang.String"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="hostName" type="java.lang.String"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[HostName as supplied by the datanode during registration as its
name. Namenode uses datanode IP address as the name.]]>
</doc>
</field>
<field name="adminState" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[DatanodeInfo represents the status of a DataNode.
This object is used for communication in the
Datanode Protocol and the Client Protocol.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DatanodeInfo -->
<!-- start class org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates -->
<class name="DatanodeInfo.AdminStates" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="NORMAL" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DECOMMISSION_INPROGRESS" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DECOMMISSIONED" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DatanodeInfo.AdminStates -->
<!-- start interface org.apache.hadoop.hdfs.protocol.DataTransferProtocol -->
<interface name="DataTransferProtocol" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<field name="DATA_TRANSFER_VERSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Version for data transfers between clients and datanodes
This should change when serialization of DatanodeInfo, not just
when protocol changes. It is not very obvious.]]>
</doc>
</field>
<field name="OP_WRITE_BLOCK" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Op.WRITE_BLOCK instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Op.WRITE_BLOCK instead.]]>
</doc>
</field>
<field name="OP_READ_BLOCK" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Op.READ_BLOCK instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Op.READ_BLOCK instead.]]>
</doc>
</field>
<field name="OP_READ_METADATA" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="As of version 15, OP_READ_METADATA is no longer supported.">
<doc>
<![CDATA[@deprecated As of version 15, OP_READ_METADATA is no longer supported.]]>
</doc>
</field>
<field name="OP_REPLACE_BLOCK" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Op.REPLACE_BLOCK instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Op.REPLACE_BLOCK instead.]]>
</doc>
</field>
<field name="OP_COPY_BLOCK" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Op.COPY_BLOCK instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Op.COPY_BLOCK instead.]]>
</doc>
</field>
<field name="OP_BLOCK_CHECKSUM" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Op.BLOCK_CHECKSUM instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Op.BLOCK_CHECKSUM instead.]]>
</doc>
</field>
<field name="OP_STATUS_SUCCESS" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.SUCCESS instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.SUCCESS instead.]]>
</doc>
</field>
<field name="OP_STATUS_ERROR" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.ERROR instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.ERROR instead.]]>
</doc>
</field>
<field name="OP_STATUS_ERROR_CHECKSUM" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.ERROR_CHECKSUM instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.ERROR_CHECKSUM instead.]]>
</doc>
</field>
<field name="OP_STATUS_ERROR_INVALID" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.ERROR_INVALID instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.ERROR_INVALID instead.]]>
</doc>
</field>
<field name="OP_STATUS_ERROR_EXISTS" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.ERROR_EXISTS instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.ERROR_EXISTS instead.]]>
</doc>
</field>
<field name="OP_STATUS_ERROR_ACCESS_TOKEN" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.ERROR_ACCESS_TOKEN instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.ERROR_ACCESS_TOKEN instead.]]>
</doc>
</field>
<field name="OP_STATUS_CHECKSUM_OK" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="Deprecated at 0.21. Use Status.CHECKSUM_OK instead.">
<doc>
<![CDATA[@deprecated Deprecated at 0.21. Use Status.CHECKSUM_OK instead.]]>
</doc>
</field>
<doc>
<![CDATA[Transfer data to/from datanode using a streaming protocol.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.protocol.DataTransferProtocol -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage -->
<class name="DataTransferProtocol.BlockConstructionStage" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="getRecoveryStage" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[get the recovery stage of this stage]]>
</doc>
</method>
<field name="PIPELINE_SETUP_APPEND" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The enumerates are always listed as regular stage followed by the
recovery stage.
Changing this order will make getRecoveryStage not working.]]>
</doc>
</field>
<field name="PIPELINE_SETUP_APPEND_RECOVERY" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DATA_STREAMING" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="PIPELINE_SETUP_STREAMING_RECOVERY" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="PIPELINE_CLOSE" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="PIPELINE_CLOSE_RECOVERY" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="PIPELINE_SETUP_CREATE" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op -->
<class name="DataTransferProtocol.Op" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="read" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read from in]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write to out]]>
</doc>
</method>
<field name="WRITE_BLOCK" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="READ_BLOCK" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="READ_METADATA" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="REPLACE_BLOCK" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="COPY_BLOCK" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BLOCK_CHECKSUM" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="code" type="byte"
transient="false" volatile="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The code for this operation.]]>
</doc>
</field>
<doc>
<![CDATA[Operation]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.PacketHeader -->
<class name="DataTransferProtocol.PacketHeader" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="DataTransferProtocol.PacketHeader"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DataTransferProtocol.PacketHeader" type="int, long, long, boolean, int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getDataLen" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isLastPacketInBlock" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getSeqno" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getOffsetInBlock" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getPacketLen" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="buf" type="java.nio.ByteBuffer"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="putInBuffer"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="buf" type="java.nio.ByteBuffer"/>
<doc>
<![CDATA[Write the header into the buffer.
This requires that PKT_HEADER_LEN bytes are available.]]>
</doc>
</method>
<method name="sanityCheck" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="lastSeqNo" type="long"/>
<doc>
<![CDATA[Perform a sanity check on the packet, returning true if it is sane.
@param lastSeqNo the previous sequence number received - we expect the current
sequence number to be larger by 1.]]>
</doc>
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="PKT_HEADER_LEN" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Header size for a packet]]>
</doc>
</field>
<doc>
<![CDATA[Header data for each packet that goes through the read/write pipelines.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.PacketHeader -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.PipelineAck -->
<class name="DataTransferProtocol.PipelineAck" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="DataTransferProtocol.PipelineAck"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[default constructor]]>
</doc>
</constructor>
<constructor name="DataTransferProtocol.PipelineAck" type="long, org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor
@param seqno sequence number
@param replies an array of replies]]>
</doc>
</constructor>
<method name="getSeqno" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the sequence number
@return the sequence number]]>
</doc>
</method>
<method name="getNumOfReplies" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the number of replies
@return the number of replies]]>
</doc>
</method>
<method name="getReply" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="i" type="int"/>
<doc>
<![CDATA[get the ith reply
@return the the ith reply]]>
</doc>
</method>
<method name="isSuccess" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Check if this ack contains error status
@return true if all statuses are SUCCESS]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Writable interface]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="UNKOWN_SEQNO" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[reply]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.PipelineAck -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Receiver -->
<class name="DataTransferProtocol.Receiver" extends="java.lang.Object"
abstract="true"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DataTransferProtocol.Receiver"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="readOp" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="protected"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read an Op. It also checks protocol version.]]>
</doc>
</method>
<method name="processOp"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="protected"
deprecated="not deprecated">
<param name="op" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"/>
<param name="in" type="java.io.DataInputStream"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Process op by the corresponding method.]]>
</doc>
</method>
<method name="opReadBlock"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="offset" type="long"/>
<param name="length" type="long"/>
<param name="client" type="java.lang.String"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Abstract OP_READ_BLOCK method. Read a block.]]>
</doc>
</method>
<method name="opWriteBlock"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="pipelineSize" type="int"/>
<param name="stage" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"/>
<param name="newGs" type="long"/>
<param name="minBytesRcvd" type="long"/>
<param name="maxBytesRcvd" type="long"/>
<param name="client" type="java.lang.String"/>
<param name="src" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="targets" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Abstract OP_WRITE_BLOCK method.
Write a block.]]>
</doc>
</method>
<method name="opReplaceBlock"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="sourceId" type="java.lang.String"/>
<param name="src" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Abstract OP_REPLACE_BLOCK method.
It is used for balancing purpose; send to a destination]]>
</doc>
</method>
<method name="opCopyBlock"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Abstract OP_COPY_BLOCK method. It is used for balancing purpose; send to
a proxy source.]]>
</doc>
</method>
<method name="opBlockChecksum"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Abstract OP_BLOCK_CHECKSUM method.
Get the checksum of a block]]>
</doc>
</method>
<doc>
<![CDATA[Receiver]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Receiver -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Sender -->
<class name="DataTransferProtocol.Sender" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DataTransferProtocol.Sender"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="op"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<param name="op" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Op"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Initialize a operation.]]>
</doc>
</method>
<method name="opReadBlock"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockOffset" type="long"/>
<param name="blockLen" type="long"/>
<param name="clientName" type="java.lang.String"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Send OP_READ_BLOCK]]>
</doc>
</method>
<method name="opWriteBlock"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="pipelineSize" type="int"/>
<param name="stage" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage"/>
<param name="newGs" type="long"/>
<param name="minBytesRcvd" type="long"/>
<param name="maxBytesRcvd" type="long"/>
<param name="client" type="java.lang.String"/>
<param name="src" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="targets" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Send OP_WRITE_BLOCK]]>
</doc>
</method>
<method name="opReplaceBlock"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="storageId" type="java.lang.String"/>
<param name="src" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Send OP_REPLACE_BLOCK]]>
</doc>
</method>
<method name="opCopyBlock"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Send OP_COPY_BLOCK]]>
</doc>
</method>
<method name="opBlockChecksum"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Send OP_BLOCK_CHECKSUM]]>
</doc>
</method>
<doc>
<![CDATA[Sender]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Sender -->
<!-- start class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status -->
<class name="DataTransferProtocol.Status" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="read" return="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read from in]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write to out]]>
</doc>
</method>
<method name="writeOutputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.OutputStream"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write to out]]>
</doc>
</method>
<field name="SUCCESS" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ERROR" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ERROR_CHECKSUM" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ERROR_INVALID" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ERROR_EXISTS" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ERROR_ACCESS_TOKEN" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="CHECKSUM_OK" type="org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Status]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Status -->
<!-- start class org.apache.hadoop.hdfs.protocol.DirectoryListing -->
<class name="DirectoryListing" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="DirectoryListing"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[default constructor]]>
</doc>
</constructor>
<constructor name="DirectoryListing" type="org.apache.hadoop.hdfs.protocol.HdfsFileStatus[], int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[constructor
@param partialListing a partial listing of a directory
@param remainingEntries number of entries that are left to be listed]]>
</doc>
</constructor>
<method name="getPartialListing" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the partial listing of file status
@return the partial listing of file status]]>
</doc>
</method>
<method name="getRemainingEntries" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the number of remaining entries that are left to be listed
@return the number of remaining entries that are left to be listed]]>
</doc>
</method>
<method name="hasMore" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Check if there are more entries that are left to be listed
@return true if there are more entries that are left to be listed;
return false otherwise.]]>
</doc>
</method>
<method name="getLastName" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the last name in this list
@return the last name in the list if it is not empty; otherwise return null]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[This class defines a partial listing of a directory to support
iterative directory listing.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DirectoryListing -->
<!-- start class org.apache.hadoop.hdfs.protocol.DSQuotaExceededException -->
<class name="DSQuotaExceededException" extends="org.apache.hadoop.hdfs.protocol.QuotaExceededException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DSQuotaExceededException"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DSQuotaExceededException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="DSQuotaExceededException" type="long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getMessage" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="serialVersionUID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.DSQuotaExceededException -->
<!-- start interface org.apache.hadoop.hdfs.protocol.FSConstants -->
<interface name="FSConstants" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<field name="MIN_BLOCKS_FOR_WRITE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BLOCK_INVALIDATE_CHUNK" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="QUOTA_DONT_SET" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="QUOTA_RESET" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="HEARTBEAT_INTERVAL" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BLOCKREPORT_INTERVAL" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BLOCKREPORT_INITIAL_DELAY" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LEASE_SOFTLIMIT_PERIOD" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LEASE_HARDLIMIT_PERIOD" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LEASE_RECOVER_PERIOD" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="MAX_PATH_LENGTH" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="MAX_PATH_DEPTH" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BUFFER_SIZE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="SMALL_BUFFER_SIZE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_BLOCK_SIZE" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_BYTES_PER_CHECKSUM" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_WRITE_PACKET_SIZE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_REPLICATION_FACTOR" type="short"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_FILE_BUFFER_SIZE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_DATA_SOCKET_SIZE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="SIZE_OF_INTEGER" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="HDFS_URI_SCHEME" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[URI Scheme for hdfs://namenode/ URIs.]]>
</doc>
</field>
<field name="LAYOUT_VERSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Please see {@link LayoutVersion} on adding new layout version.]]>
</doc>
</field>
<doc>
<![CDATA[Some handy constants]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.protocol.FSConstants -->
<!-- start class org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType -->
<class name="FSConstants.DatanodeReportType" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="ALL" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LIVE" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEAD" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType -->
<!-- start class org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction -->
<class name="FSConstants.SafeModeAction" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="SAFEMODE_LEAVE" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="SAFEMODE_ENTER" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="SAFEMODE_GET" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction -->
<!-- start class org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction -->
<class name="FSConstants.UpgradeAction" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="GET_STATUS" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DETAILED_STATUS" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FORCE_PROCEED" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Distributed upgrade actions:
1. Get upgrade status.
2. Get detailed upgrade status.
3. Proceed with the upgrade if it is stuck, no matter what the status is.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction -->
<!-- start class org.apache.hadoop.hdfs.protocol.HdfsFileStatus -->
<class name="HdfsFileStatus" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="HdfsFileStatus"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[default constructor]]>
</doc>
</constructor>
<constructor name="HdfsFileStatus" type="long, boolean, int, long, long, long, org.apache.hadoop.fs.permission.FsPermission, java.lang.String, java.lang.String, byte[], byte[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor
@param length the number of bytes the file has
@param isdir if the path is a directory
@param block_replication the replication factor
@param blocksize the block size
@param modification_time modification time
@param access_time access time
@param permission permission
@param owner the owner of the path
@param group the group of the path
@param path the local name in java UTF8 encoding the same as that in-memory]]>
</doc>
</constructor>
<method name="getLen" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the length of this file, in bytes.
@return the length of this file, in bytes.]]>
</doc>
</method>
<method name="isDir" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Is this a directory?
@return true if this is a directory]]>
</doc>
</method>
<method name="isSymlink" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Is this a symbolic link?
@return true if this is a symbolic link]]>
</doc>
</method>
<method name="getBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the block size of the file.
@return the number of bytes]]>
</doc>
</method>
<method name="getReplication" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the replication factor of a file.
@return the replication factor of a file.]]>
</doc>
</method>
<method name="getModificationTime" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the modification time of the file.
@return the modification time of file in milliseconds since January 1, 1970 UTC.]]>
</doc>
</method>
<method name="getAccessTime" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the access time of the file.
@return the access time of file in milliseconds since January 1, 1970 UTC.]]>
</doc>
</method>
<method name="getPermission" return="org.apache.hadoop.fs.permission.FsPermission"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get FsPermission associated with the file.
@return permssion]]>
</doc>
</method>
<method name="getOwner" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the owner of the file.
@return owner of the file]]>
</doc>
</method>
<method name="getGroup" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the group associated with the file.
@return group for the file.]]>
</doc>
</method>
<method name="isEmptyLocalName" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Check if the local name is empty
@return true if the name is empty]]>
</doc>
</method>
<method name="getLocalName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the string representation of the local name
@return the local name in string]]>
</doc>
</method>
<method name="getLocalNameInBytes" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the Java UTF8 representation of the local name
@return the local name in java UTF8]]>
</doc>
</method>
<method name="getFullName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<param name="parent" type="java.lang.String"/>
<doc>
<![CDATA[Get the string representation of the full path name
@param parent the parent path
@return the full path in string]]>
</doc>
</method>
<method name="getFullPath" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<param name="parent" type="org.apache.hadoop.fs.Path"/>
<doc>
<![CDATA[Get the full path
@param parent the parent path
@return the full path]]>
</doc>
</method>
<method name="getSymlink" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the string representation of the symlink.
@return the symlink as a string.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="EMPTY_NAME" type="byte[]"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Interface that represents the over the wire information for a file.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.HdfsFileStatus -->
<!-- start class org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus -->
<class name="HdfsLocatedFileStatus" extends="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="HdfsLocatedFileStatus"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Default constructor]]>
</doc>
</constructor>
<constructor name="HdfsLocatedFileStatus" type="long, boolean, int, long, long, long, org.apache.hadoop.fs.permission.FsPermission, java.lang.String, java.lang.String, byte[], byte[], org.apache.hadoop.hdfs.protocol.LocatedBlocks"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor
@param length size
@param isdir if this is directory
@param block_replication the file's replication factor
@param blocksize the file's block size
@param modification_time most recent modification time
@param access_time most recent access time
@param permission permission
@param owner owner
@param group group
@param symlink symbolic link
@param path local path name in java UTF8 format
@param locations block locations]]>
</doc>
</constructor>
<method name="getBlockLocations" return="org.apache.hadoop.hdfs.protocol.LocatedBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Interface that represents the over the wire information
including block locations for a file.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.HdfsLocatedFileStatus -->
<!-- start class org.apache.hadoop.hdfs.protocol.LayoutVersion -->
<class name="LayoutVersion" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="LayoutVersion"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets formatted string that describes {@link LayoutVersion} information.]]>
</doc>
</method>
<method name="supports" return="boolean"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"/>
<param name="lv" type="int"/>
<doc>
<![CDATA[Returns true if a given feature is supported in the given layout version
@param f Feature
@param lv LayoutVersion
@return true if {@code f} is supported in layout version {@code lv}]]>
</doc>
</method>
<method name="getCurrentLayoutVersion" return="int"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the current layout version]]>
</doc>
</method>
<doc>
<![CDATA[This class tracks changes in the layout version of HDFS.
Layout version is changed for following reasons:
<ol>
<li>The layout of how namenode or datanode stores information
on disk changes.</li>
<li>A new operation code is added to the editlog.</li>
<li>Modification such as format of a record, content of a record
in editlog or fsimage.</li>
</ol>
<br>
<b>How to update layout version:<br></b>
When a change requires new layout version, please add an entry into
{@link Feature} with a short enum name, new layout version and description
of the change. Please see {@link Feature} for further details.
<br>]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.LayoutVersion -->
<!-- start class org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature -->
<class name="LayoutVersion.Feature" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="NAMESPACE_QUOTA" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FILE_ACCESS_TIME" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DISKSPACE_QUOTA" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="STICKY_BIT" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="APPEND_RBW_DIR" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ATOMIC_RENAME" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="CONCAT" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="SYMLINKS" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DELEGATION_TOKEN" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FSIMAGE_COMPRESSION" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FSIMAGE_CHECKSUM" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="REMOVE_REL13_DISK_LAYOUT_SUPPORT" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="UNUSED_28" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="UNUSED_29" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="UNUSED_30" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RESERVED_REL20_203" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RESERVED_REL20_204" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RESERVED_REL22" type="org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Enums for features that change the layout version.
<br><br>
To add a new layout version:
<ul>
<li>Define a new enum constant with a short enum name, the new layout version
and description of the added feature.</li>
<li>When adding a layout version with an ancestor that is not same as
its immediate predecessor, use the constructor where a spacific ancestor
can be passed.
</li>
</ul>]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.LayoutVersion.Feature -->
<!-- start class org.apache.hadoop.hdfs.protocol.LocatedBlock -->
<class name="LocatedBlock" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="LocatedBlock"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="LocatedBlock" type="org.apache.hadoop.hdfs.protocol.Block, org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="LocatedBlock" type="org.apache.hadoop.hdfs.protocol.Block, org.apache.hadoop.hdfs.protocol.DatanodeInfo[], long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="LocatedBlock" type="org.apache.hadoop.hdfs.protocol.Block, org.apache.hadoop.hdfs.protocol.DatanodeInfo[], long, boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getBlockToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setBlockToken"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
</method>
<method name="getBlock" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getLocations" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getStartOffset" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isCorrupt" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="read" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read LocatedBlock from in.]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[A LocatedBlock is a pair of Block, DatanodeInfo[]
objects. It tells where to find a Block.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.LocatedBlock -->
<!-- start class org.apache.hadoop.hdfs.protocol.LocatedBlocks -->
<class name="LocatedBlocks" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="LocatedBlocks"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="LocatedBlocks" type="long, boolean, java.util.List, org.apache.hadoop.hdfs.protocol.LocatedBlock, boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[public Constructor]]>
</doc>
</constructor>
<method name="getLocatedBlocks" return="java.util.List"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get located blocks.]]>
</doc>
</method>
<method name="getLastLocatedBlock" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the last located block.]]>
</doc>
</method>
<method name="isLastBlockComplete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Is the last block completed?]]>
</doc>
</method>
<method name="get" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="index" type="int"/>
<doc>
<![CDATA[Get located block.]]>
</doc>
</method>
<method name="locatedBlockCount" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get number of located blocks.]]>
</doc>
</method>
<method name="getFileLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isUnderConstruction" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return ture if file was under construction when
this LocatedBlocks was constructed, false otherwise.]]>
</doc>
</method>
<method name="findBlock" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="offset" type="long"/>
<doc>
<![CDATA[Find block containing specified offset.
@return block if found, or null otherwise.]]>
</doc>
</method>
<method name="insertRange"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blockIdx" type="int"/>
<param name="newBlocks" type="java.util.List"/>
</method>
<method name="getInsertIndex" return="int"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="binSearchResult" type="int"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[Collection of blocks with their locations and the file length.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.LocatedBlocks -->
<!-- start class org.apache.hadoop.hdfs.protocol.NSQuotaExceededException -->
<class name="NSQuotaExceededException" extends="org.apache.hadoop.hdfs.protocol.QuotaExceededException"
abstract="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<constructor name="NSQuotaExceededException"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="NSQuotaExceededException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="NSQuotaExceededException" type="long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getMessage" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="serialVersionUID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.NSQuotaExceededException -->
<!-- start class org.apache.hadoop.hdfs.protocol.QuotaExceededException -->
<class name="QuotaExceededException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="QuotaExceededException"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<constructor name="QuotaExceededException" type="java.lang.String"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<constructor name="QuotaExceededException" type="long, long"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<method name="setPathName"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
</method>
<method name="getMessage" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="serialVersionUID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
<field name="pathName" type="java.lang.String"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="quota" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="count" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[This exception is thrown when modification to HDFS results in violation
of a directory quota. A directory quota might be namespace quota (limit
on number of files and directories) or a diskspace quota (limit on space
taken by all the file under the directory tree). <br> <br>
The message for the exception specifies the directory where the quota
was violated and actual quotas. Specific message is generated in the
corresponding Exception class:
DSQuotaExceededException or
NSQuotaExceededException]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.QuotaExceededException -->
<!-- start class org.apache.hadoop.hdfs.protocol.RecoveryInProgressException -->
<class name="RecoveryInProgressException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="RecoveryInProgressException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[Exception indicating that a replica is already being recovery.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.RecoveryInProgressException -->
<!-- start class org.apache.hadoop.hdfs.protocol.UnregisteredNodeException -->
<class name="UnregisteredNodeException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="UnregisteredNodeException" type="org.apache.hadoop.hdfs.server.protocol.NodeRegistration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="UnregisteredNodeException" type="org.apache.hadoop.hdfs.protocol.DatanodeID, org.apache.hadoop.hdfs.protocol.DatanodeInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The exception is thrown if a different data-node claims the same
storage id as the existing one.
@param nodeID unregistered data-node
@param storedNode data-node stored in the system with this storage id]]>
</doc>
</constructor>
<doc>
<![CDATA[This exception is thrown when a node that has not previously
registered is trying to access the name node.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.UnregisteredNodeException -->
<!-- start class org.apache.hadoop.hdfs.protocol.UnresolvedPathException -->
<class name="UnresolvedPathException" extends="org.apache.hadoop.fs.UnresolvedLinkException"
abstract="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<constructor name="UnresolvedPathException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Used by RemoteException to instantiate an UnresolvedPathException.]]>
</doc>
</constructor>
<constructor name="UnresolvedPathException" type="java.lang.String, java.lang.String, java.lang.String, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getResolvedPath" return="org.apache.hadoop.fs.Path"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return a path with the link resolved with the target.]]>
</doc>
</method>
<method name="getMessage" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[Thrown when a symbolic link is encountered in a path.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.protocol.UnresolvedPathException -->
</package>
<package name="org.apache.hadoop.hdfs.security.token.block">
<!-- start class org.apache.hadoop.hdfs.security.token.block.BlockKey -->
<class name="BlockKey" extends="org.apache.hadoop.security.token.delegation.DelegationKey"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockKey"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="BlockKey" type="int, long, javax.crypto.SecretKey"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[Key used for generating and verifying block tokens]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.BlockKey -->
<!-- start class org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier -->
<class name="BlockTokenIdentifier" extends="org.apache.hadoop.security.token.TokenIdentifier"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockTokenIdentifier"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="BlockTokenIdentifier" type="java.lang.String, long, java.util.EnumSet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getKind" return="org.apache.hadoop.io.Text"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getUser" return="org.apache.hadoop.security.UserGroupInformation"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getExpiryDate" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setExpiryDate"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="expiryDate" type="long"/>
</method>
<method name="getKeyId" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setKeyId"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="keyId" type="int"/>
</method>
<method name="getUserId" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getBlockId" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getAccessModes" return="java.util.EnumSet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="obj" type="java.lang.Object"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getBytes" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier -->
<!-- start class org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager -->
<class name="BlockTokenSecretManager" extends="org.apache.hadoop.security.token.SecretManager"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockTokenSecretManager" type="boolean, long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Constructor
@param isMaster
@param keyUpdateInterval
@param tokenLifetime
@throws IOException]]>
</doc>
</constructor>
<method name="exportKeys" return="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Export block keys, only to be used in master mode]]>
</doc>
</method>
<method name="setKeys"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="exportedKeys" type="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set block keys, only to be used in slave mode]]>
</doc>
</method>
<method name="updateKeys"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update block keys, only to be used in master mode]]>
</doc>
</method>
<method name="generateToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="modes" type="java.util.EnumSet"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Generate an block token for current user]]>
</doc>
</method>
<method name="generateToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="userId" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="modes" type="java.util.EnumSet"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Generate a block token for a specified user]]>
</doc>
</method>
<method name="checkAccess"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="id" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier"/>
<param name="userId" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="mode" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<doc>
<![CDATA[Check if access should be allowed. userID is not checked if null. This
method doesn't check if token password is correct. It should be used only
when token password has already been verified (e.g., in the RPC layer).]]>
</doc>
</method>
<method name="checkAccess"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<param name="userId" type="java.lang.String"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="mode" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<doc>
<![CDATA[Check if access should be allowed. userID is not checked if null]]>
</doc>
</method>
<method name="setTokenLifetime"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="tokenLifetime" type="long"/>
<doc>
<![CDATA[set token lifetime.]]>
</doc>
</method>
<method name="createIdentifier" return="org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create an empty block token identifier
@return a newly created empty block token identifier]]>
</doc>
</method>
<method name="createPassword" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="identifier" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier"/>
<doc>
<![CDATA[Create a new password/secret for the given block token identifier.
@param identifier
the block token identifier
@return token password/secret]]>
</doc>
</method>
<method name="retrievePassword" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="identifier" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<doc>
<![CDATA[Look up the token password/secret for the given block token identifier.
@param identifier
the block token identifier to look up
@return token password/secret as byte[]
@throws InvalidToken]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DUMMY_TOKEN" type="org.apache.hadoop.security.token.Token"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[BlockTokenSecretManager can be instantiated in 2 modes, master mode and slave
mode. Master can generate new block keys and export block keys to slaves,
while slaves can only import and use block keys received from master. Both
master and slave can generate and verify block tokens. Typically, master mode
is used by NN and slave mode is used by DN.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager -->
<!-- start class org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode -->
<class name="BlockTokenSecretManager.AccessMode" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="READ" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="WRITE" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="COPY" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="REPLACE" type="org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager.AccessMode -->
<!-- start class org.apache.hadoop.hdfs.security.token.block.BlockTokenSelector -->
<class name="BlockTokenSelector" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.security.token.TokenSelector"/>
<constructor name="BlockTokenSelector"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="selectToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="service" type="org.apache.hadoop.io.Text"/>
<param name="tokens" type="java.util.Collection"/>
</method>
<doc>
<![CDATA[A block token selector for HDFS]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.BlockTokenSelector -->
<!-- start class org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys -->
<class name="ExportedBlockKeys" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="ExportedBlockKeys"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="isBlockTokenEnabled" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getKeyUpdateInterval" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getTokenLifetime" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getCurrentKey" return="org.apache.hadoop.hdfs.security.token.block.BlockKey"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getAllKeys" return="org.apache.hadoop.hdfs.security.token.block.BlockKey[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="DUMMY_KEYS" type="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Object for passing block keys]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys -->
<!-- start class org.apache.hadoop.hdfs.security.token.block.InvalidBlockTokenException -->
<class name="InvalidBlockTokenException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="InvalidBlockTokenException"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="InvalidBlockTokenException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[Access token verification failed.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.block.InvalidBlockTokenException -->
</package>
<package name="org.apache.hadoop.hdfs.security.token.delegation">
<!-- start class org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier -->
<class name="DelegationTokenIdentifier" extends="org.apache.hadoop.security.token.delegation.AbstractDelegationTokenIdentifier"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DelegationTokenIdentifier"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create an empty delegation token identifier for reading into.]]>
</doc>
</constructor>
<constructor name="DelegationTokenIdentifier" type="org.apache.hadoop.io.Text, org.apache.hadoop.io.Text, org.apache.hadoop.io.Text"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create a new delegation token identifier
@param owner the effective username of the token owner
@param renewer the username of the renewer
@param realUser the real username of the token owner]]>
</doc>
</constructor>
<method name="getKind" return="org.apache.hadoop.io.Text"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="HDFS_DELEGATION_KIND" type="org.apache.hadoop.io.Text"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[A delegation token identifier that is specific to HDFS.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier -->
<!-- start class org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSecretManager -->
<class name="DelegationTokenSecretManager" extends="org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSecretManager"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DelegationTokenSecretManager" type="long, long, long, long, org.apache.hadoop.hdfs.server.namenode.FSNamesystem"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create a secret manager
@param delegationKeyUpdateInterval the number of seconds for rolling new
secret keys.
@param delegationTokenMaxLifetime the maximum lifetime of the delegation
tokens
@param delegationTokenRenewInterval how often the tokens must be renewed
@param delegationTokenRemoverScanInterval how often the tokens are scanned
for expired tokens]]>
</doc>
</constructor>
<method name="createIdentifier" return="org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getTokenExpiryTime" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="dtId" type="org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns expiry time of a token given its identifier.
@param dtId DelegationTokenIdentifier of a token
@return Expiry time of the token
@throws IOException]]>
</doc>
</method>
<method name="loadSecretManagerState"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Load SecretManager state from fsimage.
@param in input stream to read fsimage
@throws IOException]]>
</doc>
</method>
<method name="saveSecretManagerState"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutputStream"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Store the current state of the SecretManager for persistence
@param out Output stream for writing into fsimage.
@throws IOException]]>
</doc>
</method>
<method name="addPersistedDelegationToken"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="identifier" type="org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier"/>
<param name="expiryTime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[This method is intended to be used only while reading edit logs.
@param identifier DelegationTokenIdentifier read from the edit logs or
fsimage
@param expiryTime token expiry time
@throws IOException]]>
</doc>
</method>
<method name="updatePersistedMasterKey"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="org.apache.hadoop.security.token.delegation.DelegationKey"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Add a MasterKey to the list of keys.
@param key DelegationKey
@throws IOException]]>
</doc>
</method>
<method name="updatePersistedTokenRenewal"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="identifier" type="org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier"/>
<param name="expiryTime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update the token cache with renewal record in edit logs.
@param identifier DelegationTokenIdentifier of the renewed token
@param expiryTime
@throws IOException]]>
</doc>
</method>
<method name="updatePersistedTokenCancellation"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="identifier" type="org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update the token cache with the cancel record in edit logs
@param identifier DelegationTokenIdentifier of the canceled token
@throws IOException]]>
</doc>
</method>
<method name="getNumberOfKeys" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the number of delegation keys currently stored.
@return number of delegation keys]]>
</doc>
</method>
<method name="logUpdateMasterKey"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="key" type="org.apache.hadoop.security.token.delegation.DelegationKey"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Call namesystem to update editlogs for new master key.]]>
</doc>
</method>
<doc>
<![CDATA[A HDFS specific delegation token secret manager.
The secret manager is responsible for generating and accepting the password
for each token.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSecretManager -->
<!-- start class org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSelector -->
<class name="DelegationTokenSelector" extends="org.apache.hadoop.security.token.delegation.AbstractDelegationTokenSelector"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DelegationTokenSelector"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[A delegation token that is specialized for HDFS]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSelector -->
</package>
<package name="org.apache.hadoop.hdfs.server.balancer">
<!-- start class org.apache.hadoop.hdfs.server.balancer.Balancer -->
<class name="Balancer" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.util.Tool"/>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<doc>
<![CDATA[Run a balancer
@param args]]>
</doc>
</method>
<method name="run" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[main method of Balancer
@param args arguments to a Balancer
@throws Exception exception that occured during datanode balancing]]>
</doc>
</method>
<method name="getConf" return="org.apache.hadoop.conf.Configuration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[return this balancer's configuration]]>
</doc>
</method>
<method name="setConf"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<doc>
<![CDATA[set this balancer's configuration]]>
</doc>
</method>
<field name="MAX_NUM_CONCURRENT_MOVES" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The maximum number of concurrent blocks moves for
balancing purpose at a datanode]]>
</doc>
</field>
<field name="SUCCESS" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ALREADY_RUNNING" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="NO_MOVE_BLOCK" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="NO_MOVE_PROGRESS" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="IO_EXCEPTION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ILLEGAL_ARGS" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[<p>The balancer is a tool that balances disk space usage on an HDFS cluster
when some datanodes become full or when new empty nodes join the cluster.
The tool is deployed as an application program that can be run by the
cluster administrator on a live HDFS cluster while applications
adding and deleting files.
<p>SYNOPSIS
<pre>
To start:
bin/start-balancer.sh [-threshold <threshold>]
Example: bin/ start-balancer.sh
start the balancer with a default threshold of 10%
bin/ start-balancer.sh -threshold 5
start the balancer with a threshold of 5%
To stop:
bin/ stop-balancer.sh
</pre>
<p>DESCRIPTION
<p>The threshold parameter is a fraction in the range of (0%, 100%) with a
default value of 10%. The threshold sets a target for whether the cluster
is balanced. A cluster is balanced if for each datanode, the utilization
of the node (ratio of used space at the node to total capacity of the node)
differs from the utilization of the (ratio of used space in the cluster
to total capacity of the cluster) by no more than the threshold value.
The smaller the threshold, the more balanced a cluster will become.
It takes more time to run the balancer for small threshold values.
Also for a very small threshold the cluster may not be able to reach the
balanced state when applications write and delete files concurrently.
<p>The tool moves blocks from highly utilized datanodes to poorly
utilized datanodes iteratively. In each iteration a datanode moves or
receives no more than the lesser of 10G bytes or the threshold fraction
of its capacity. Each iteration runs no more than 20 minutes.
At the end of each iteration, the balancer obtains updated datanodes
information from the namenode.
<p>A system property that limits the balancer's use of bandwidth is
defined in the default configuration file:
<pre>
<property>
<name>dfs.balance.bandwidthPerSec</name>
<value>1048576</value>
<description> Specifies the maximum bandwidth that each datanode
can utilize for the balancing purpose in term of the number of bytes
per second. </description>
</property>
</pre>
<p>This property determines the maximum speed at which a block will be
moved from one datanode to another. The default value is 1MB/s. The higher
the bandwidth, the faster a cluster can reach the balanced state,
but with greater competition with application processes. If an
administrator changes the value of this property in the configuration
file, the change is observed when HDFS is next restarted.
<p>MONITERING BALANCER PROGRESS
<p>After the balancer is started, an output file name where the balancer
progress will be recorded is printed on the screen. The administrator
can monitor the running of the balancer by reading the output file.
The output shows the balancer's status iteration by iteration. In each
iteration it prints the starting time, the iteration number, the total
number of bytes that have been moved in the previous iterations,
the total number of bytes that are left to move in order for the cluster
to be balanced, and the number of bytes that are being moved in this
iteration. Normally "Bytes Already Moved" is increasing while "Bytes Left
To Move" is decreasing.
<p>Running multiple instances of the balancer in an HDFS cluster is
prohibited by the tool.
<p>The balancer automatically exits when any of the following five
conditions is satisfied:
<ol>
<li>The cluster is balanced;
<li>No block can be moved;
<li>No block has been moved for five consecutive iterations;
<li>An IOException occurs while communicating with the namenode;
<li>Another balancer is running.
</ol>
<p>Upon exit, a balancer returns an exit code and prints one of the
following messages to the output file in corresponding to the above exit
reasons:
<ol>
<li>The cluster is balanced. Exiting
<li>No block can be moved. Exiting...
<li>No block has been moved for 3 iterations. Exiting...
<li>Received an IO exception: failure reason. Exiting...
<li>Another balancer is running. Exiting...
</ol>
<p>The administrator can interrupt the execution of the balancer at any
time by running the command "stop-balancer.sh" on the machine where the
balancer is running.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.balancer.Balancer -->
</package>
<package name="org.apache.hadoop.hdfs.server.common">
<!-- start class org.apache.hadoop.hdfs.server.common.GenerationStamp -->
<class name="GenerationStamp" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.lang.Comparable"/>
<constructor name="GenerationStamp"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create a new instance, initialized to FIRST_VALID_STAMP.]]>
</doc>
</constructor>
<method name="getStamp" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the current generation stamp]]>
</doc>
</method>
<method name="setStamp"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="stamp" type="long"/>
<doc>
<![CDATA[Sets the current generation stamp]]>
</doc>
</method>
<method name="nextStamp" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[First increments the counter and then returns the stamp]]>
</doc>
</method>
<method name="compareTo" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="that" type="org.apache.hadoop.hdfs.server.common.GenerationStamp"/>
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="FIRST_VALID_STAMP" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The first valid generation stamp.]]>
</doc>
</field>
<field name="GRANDFATHER_GENERATION_STAMP" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Generation stamp of blocks that pre-date the introduction
of a generation stamp.]]>
</doc>
</field>
<doc>
<![CDATA[A GenerationStamp is a Hadoop FS primitive, identified by a long.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.GenerationStamp -->
<!-- start interface org.apache.hadoop.hdfs.server.common.HdfsConstants -->
<interface name="HdfsConstants" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<field name="READ_TIMEOUT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="READ_TIMEOUT_EXTENSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="WRITE_TIMEOUT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="WRITE_TIMEOUT_EXTENSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DN_KEEPALIVE_TIMEOUT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Some handy internal HDFS constants]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.common.HdfsConstants -->
<!-- start class org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState -->
<class name="HdfsConstants.BlockUCState" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="COMPLETE" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Block construction completed.<br>
The block has at least one {@link ReplicaState#FINALIZED} replica,
and is not going to be modified.]]>
</doc>
</field>
<field name="UNDER_CONSTRUCTION" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The block is under construction.<br>
It has been recently allocated for write or append.]]>
</doc>
</field>
<field name="UNDER_RECOVERY" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The block is under recovery.<br>
When a file lease expires its last block may not be {@link #COMPLETE}
and needs to go through a recovery procedure,
which synchronizes the existing replicas contents.]]>
</doc>
</field>
<field name="COMMITTED" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The block is committed.<br>
The client reported that all bytes are written to data-nodes
with the given generation stamp and block length, but no
{@link ReplicaState#FINALIZED}
replicas has yet been reported by data-nodes themselves.]]>
</doc>
</field>
<doc>
<![CDATA[States, which a block can go through while it is under construction.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.HdfsConstants.BlockUCState -->
<!-- start class org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole -->
<class name="HdfsConstants.NamenodeRole" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="ACTIVE" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BACKUP" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="CHECKPOINT" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="STANDBY" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Defines the NameNode role.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole -->
<!-- start class org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType -->
<class name="HdfsConstants.NodeType" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="NAME_NODE" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DATA_NODE" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Type of the node]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType -->
<!-- start class org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState -->
<class name="HdfsConstants.ReplicaState" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="getValue" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getState" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="v" type="int"/>
</method>
<method name="read" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read from in]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write to out]]>
</doc>
</method>
<field name="FINALIZED" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Replica is finalized. The state when replica is not modified.]]>
</doc>
</field>
<field name="RBW" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Replica is being written to.]]>
</doc>
</field>
<field name="RWR" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Replica is waiting to be recovered.]]>
</doc>
</field>
<field name="RUR" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Replica is under recovery.]]>
</doc>
</field>
<field name="TEMPORARY" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Temporary replica: created for replication and relocation only.]]>
</doc>
</field>
<doc>
<![CDATA[Block replica states, which it can go through while being constructed.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState -->
<!-- start class org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption -->
<class name="HdfsConstants.StartupOption" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="getName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toNodeRole" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="FORMAT" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="REGULAR" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="BACKUP" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="CHECKPOINT" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="UPGRADE" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ROLLBACK" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FINALIZE" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="IMPORT" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Startup options]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption -->
<!-- start class org.apache.hadoop.hdfs.server.common.InconsistentFSStateException -->
<class name="InconsistentFSStateException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="InconsistentFSStateException" type="java.io.File, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="InconsistentFSStateException" type="java.io.File, java.lang.String, java.lang.Throwable"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[The exception is thrown when file system state is inconsistent
and is not recoverable.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.InconsistentFSStateException -->
<!-- start class org.apache.hadoop.hdfs.server.common.IncorrectVersionException -->
<class name="IncorrectVersionException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="IncorrectVersionException" type="int, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="IncorrectVersionException" type="int, java.lang.String, int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[The exception is thrown when external version does not match
current version of the application.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.IncorrectVersionException -->
<!-- start class org.apache.hadoop.hdfs.server.common.JspHelper -->
<class name="JspHelper" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="bestNode" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="blks" type="org.apache.hadoop.hdfs.protocol.LocatedBlocks"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="bestNode" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="blk" type="org.apache.hadoop.hdfs.protocol.LocatedBlock"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="bestNode" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodes" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"/>
<param name="doRandom" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="streamBlockInAscii"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="addr" type="java.net.InetSocketAddress"/>
<param name="blockId" type="long"/>
<param name="blockToken" type="org.apache.hadoop.security.token.Token"/>
<param name="genStamp" type="long"/>
<param name="blockSize" type="long"/>
<param name="offsetIntoBlock" type="long"/>
<param name="chunkSizeToView" type="long"/>
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="addTableHeader"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="addTableRow"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<param name="columns" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="addTableRow"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<param name="columns" type="java.lang.String[]"/>
<param name="row" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="addTableFooter"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="sortNodeList"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodes" type="java.util.ArrayList"/>
<param name="field" type="java.lang.String"/>
<param name="order" type="java.lang.String"/>
</method>
<method name="printPathWithLinks"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="dir" type="java.lang.String"/>
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<param name="namenodeInfoPort" type="int"/>
<param name="tokenString" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="printGotoForm"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<param name="namenodeInfoPort" type="int"/>
<param name="tokenString" type="java.lang.String"/>
<param name="file" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="createTitle"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="javax.servlet.jsp.JspWriter"/>
<param name="req" type="javax.servlet.http.HttpServletRequest"/>
<param name="file" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="string2ChunkSizeToView" return="int"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="s" type="java.lang.String"/>
<param name="defaultValue" type="int"/>
<doc>
<![CDATA[Convert a String to chunk-size-to-view.]]>
</doc>
</method>
<method name="getVersionTable" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return a table containing version information.]]>
</doc>
</method>
<method name="validatePath" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="p" type="java.lang.String"/>
<doc>
<![CDATA[Validate filename.
@return null if the filename is invalid.
Otherwise, return the validated filename.]]>
</doc>
</method>
<method name="validateLong" return="java.lang.Long"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="value" type="java.lang.String"/>
<doc>
<![CDATA[Validate a long value.
@return null if the value is invalid.
Otherwise, return the validated Long object.]]>
</doc>
</method>
<method name="validateURL" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="value" type="java.lang.String"/>
<doc>
<![CDATA[Validate a URL.
@return null if the value is invalid.
Otherwise, return the validated URL String.]]>
</doc>
</method>
<method name="getDefaultWebUser" return="org.apache.hadoop.security.UserGroupInformation"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[If security is turned off, what is the default web user?
@param conf the configuration to look in
@return the remote user that was configuration]]>
</doc>
</method>
<method name="getUGI" return="org.apache.hadoop.security.UserGroupInformation"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get {@link UserGroupInformation} and possibly the delegation token out of
the request.
@param request the http request
@return a new user from the request
@throws AccessControlException if the request has no token]]>
</doc>
</method>
<method name="getDelegationTokenUrlParam" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="tokenString" type="java.lang.String"/>
<doc>
<![CDATA[Returns the url parameter for the given token string.
@param tokenString
@return url parameter]]>
</doc>
</method>
<method name="getUrlParam" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
<param name="val" type="java.lang.String"/>
<param name="paramSeparator" type="java.lang.String"/>
<doc>
<![CDATA[Returns the url parameter for the given string, prefixed with
paramSeparator.
@param name parameter name
@param val parameter value
@param paramSeparator URL parameter prefix, i.e. either '?' or '&'
@return url parameter]]>
</doc>
</method>
<method name="getUrlParam" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
<param name="val" type="java.lang.String"/>
<param name="firstParam" type="boolean"/>
<doc>
<![CDATA[Returns the url parameter for the given string, prefixed with '?' if
firstParam is true, prefixed with '&' if firstParam is false.
@param name parameter name
@param val parameter value
@param firstParam true if this is the first parameter in the list, false otherwise
@return url parameter]]>
</doc>
</method>
<method name="getUrlParam" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
<param name="val" type="java.lang.String"/>
<doc>
<![CDATA[Returns the url parameter for the given string, prefixed with '&'.
@param name parameter name
@param val parameter value
@return url parameter]]>
</doc>
</method>
<field name="CURRENT_CONF" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="WEB_UGI_PROPERTY_NAME" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DELEGATION_PARAMETER_NAME" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.JspHelper -->
<!-- start class org.apache.hadoop.hdfs.server.common.Storage -->
<class name="Storage" extends="org.apache.hadoop.hdfs.server.common.StorageInfo"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="Storage" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[Create empty storage info of the specified type]]>
</doc>
</constructor>
<constructor name="Storage" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType, int, long"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<constructor name="Storage" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType, org.apache.hadoop.hdfs.server.common.StorageInfo"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<method name="dirIterator" return="java.util.Iterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return default iterator
This iterator returns all entries in storageDirs]]>
</doc>
</method>
<method name="dirIterator" return="java.util.Iterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="dirType" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirType"/>
<doc>
<![CDATA[Return iterator based on Storage Directory Type
This iterator selects entries in storageDirs of type dirType and returns
them via the Iterator]]>
</doc>
</method>
<method name="listStorageDirectories" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[generate storage list (debug line)]]>
</doc>
</method>
<method name="getNumStorageDirs" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getStorageDir" return="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="idx" type="int"/>
</method>
<method name="addStorageDir"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
</method>
<method name="isPreUpgradableLayout" return="boolean"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return true if the layout of the given storage directory is from a version
of Hadoop prior to the introduction of the "current" and "previous"
directories which allow upgrade and rollback.]]>
</doc>
</method>
<method name="checkVersionUpgradable"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="protected"
deprecated="not deprecated">
<param name="oldVersion" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Checks if the upgrade from the given old version is supported. If
no upgrade is supported, it throws IncorrectVersionException.
@param oldVersion]]>
</doc>
</method>
<method name="getFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="props" type="java.util.Properties"/>
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get common storage fields.
Should be overloaded if additional fields need to be get.
@param props
@throws IOException]]>
</doc>
</method>
<method name="setFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="props" type="java.util.Properties"/>
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set common storage fields.
Should be overloaded if additional fields need to be set.
@param props
@throws IOException]]>
</doc>
</method>
<method name="rename"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="from" type="java.io.File"/>
<param name="to" type="java.io.File"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="deleteDir"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="protected"
deprecated="not deprecated">
<param name="dir" type="java.io.File"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="writeAll"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write all data storage files.
@throws IOException]]>
</doc>
</method>
<method name="unlockAll"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Unlock all storage directories.
@throws IOException]]>
</doc>
</method>
<method name="isLockSupported" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="idx" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Check whether underlying file system supports file locking.
@return <code>true</code> if exclusive locks are supported or
<code>false</code> otherwise.
@throws IOException
@see StorageDirectory#lock()]]>
</doc>
</method>
<method name="getBuildVersion" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getRegistrationID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="storage" type="org.apache.hadoop.hdfs.server.common.StorageInfo"/>
</method>
<method name="is203LayoutVersion" return="boolean"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="layoutVersion" type="int"/>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LAST_PRE_UPGRADE_LAYOUT_VERSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
<field name="LAST_UPGRADABLE_LAYOUT_VERSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LAST_UPGRADABLE_HADOOP_VERSION" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
<field name="PRE_GENERATIONSTAMP_LAYOUT_VERSION" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LAYOUT_VERSIONS_203" type="int[]"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Layout versions of 0.20.203 release]]>
</doc>
</field>
<field name="STORAGE_FILE_VERSION" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="protected"
deprecated="not deprecated">
</field>
<field name="STORAGE_DIR_CURRENT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="storageDirs" type="java.util.List"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Storage information file.
<p>
Local storage information is stored in a separate file VERSION.
It contains type of the node,
the storage layout version, the namespace id, and
the fs state creation time.
<p>
Local storage can reside in multiple directories.
Each directory should contain the same VERSION file as the others.
During startup Hadoop servers (name-node and data-nodes) read their local
storage information from them.
<p>
The servers hold a lock for each storage directory while they run so that
other nodes were not able to startup sharing the same storage.
The locks are released when the servers stop (normally or abnormally).]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.Storage -->
<!-- start class org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory -->
<class name="Storage.StorageDirectory" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="Storage.StorageDirectory" type="java.io.File"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="Storage.StorageDirectory" type="java.io.File, org.apache.hadoop.hdfs.server.common.Storage.StorageDirType"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getRoot" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get root directory of this storage]]>
</doc>
</method>
<method name="getStorageDirType" return="org.apache.hadoop.hdfs.server.common.Storage.StorageDirType"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get storage directory type]]>
</doc>
</method>
<method name="read"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Read version file.
@throws IOException if file cannot be read or contains inconsistent data]]>
</doc>
</method>
<method name="read"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="from" type="java.io.File"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write version file.
@throws IOException]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="to" type="java.io.File"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="clearDirectory"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Clear and re-create storage directory.
<p>
Removes contents of the current directory and creates an empty directory.
This does not fully format storage directory.
It cannot write the version file since it should be written last after
all other storage type dependent files are written.
Derived storage is responsible for setting specific storage values and
writing the version file to disk.
@throws IOException]]>
</doc>
</method>
<method name="getCurrentDir" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Directory {@code current} contains latest files defining
the file system meta-data.
@return the directory path]]>
</doc>
</method>
<method name="getVersionFile" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[File {@code VERSION} contains the following fields:
<ol>
<li>node type</li>
<li>layout version</li>
<li>namespaceID</li>
<li>fs state creation time</li>
<li>other fields specific for this node type</li>
</ol>
The version file is always written last during storage directory updates.
The existence of the version file indicates that all other files have
been successfully written in the storage directory, the storage is valid
and does not need to be recovered.
@return the version file path]]>
</doc>
</method>
<method name="getPreviousVersionFile" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[File {@code VERSION} from the {@code previous} directory.
@return the previous version file path]]>
</doc>
</method>
<method name="getPreviousDir" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Directory {@code previous} contains the previous file system state,
which the system can be rolled back to.
@return the directory path]]>
</doc>
</method>
<method name="getPreviousTmp" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@code previous.tmp} is a transient directory, which holds
current file system state while the new state is saved into the new
{@code current} during upgrade.
If the saving succeeds {@code previous.tmp} will be moved to
{@code previous}, otherwise it will be renamed back to
{@code current} by the recovery procedure during startup.
@return the directory path]]>
</doc>
</method>
<method name="getRemovedTmp" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@code removed.tmp} is a transient directory, which holds
current file system state while the previous state is moved into
{@code current} during rollback.
If the moving succeeds {@code removed.tmp} will be removed,
otherwise it will be renamed back to
{@code current} by the recovery procedure during startup.
@return the directory path]]>
</doc>
</method>
<method name="getFinalizedTmp" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@code finalized.tmp} is a transient directory, which holds
the {@code previous} file system state while it is being removed
in response to the finalize request.
Finalize operation will remove {@code finalized.tmp} when completed,
otherwise the removal will resume upon the system startup.
@return the directory path]]>
</doc>
</method>
<method name="getLastCheckpointTmp" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@code lastcheckpoint.tmp} is a transient directory, which holds
current file system state while the new state is saved into the new
{@code current} during regular namespace updates.
If the saving succeeds {@code lastcheckpoint.tmp} will be moved to
{@code previous.checkpoint}, otherwise it will be renamed back to
{@code current} by the recovery procedure during startup.
@return the directory path]]>
</doc>
</method>
<method name="getPreviousCheckpoint" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@code previous.checkpoint} is a directory, which holds the previous
(before the last save) state of the storage directory.
The directory is created as a reference only, it does not play role
in state recovery procedures, and is recycled automatically,
but it may be useful for manual recovery of a stale state of the system.
@return the directory path]]>
</doc>
</method>
<method name="analyzeStorage" return="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="startOpt" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Check consistency of the storage directory
@param startOpt a startup option.
@return state {@link StorageState} of the storage directory
@throws InconsistentFSStateException if directory state is not
consistent and cannot be recovered.
@throws IOException]]>
</doc>
</method>
<method name="doRecover"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="curState" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Complete or recover storage state from previously failed transition.
@param curState specifies what/how the state should be recovered
@throws IOException]]>
</doc>
</method>
<method name="lock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Lock storage to provide exclusive access.
<p> Locking is not supported by all file systems.
E.g., NFS does not consistently support exclusive locks.
<p> If locking is supported we guarantee exculsive access to the
storage directory. Otherwise, no guarantee is given.
@throws IOException if locking fails]]>
</doc>
</method>
<method name="unlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Unlock storage.
@throws IOException]]>
</doc>
</method>
<doc>
<![CDATA[One of the storage directories.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory -->
<!-- start interface org.apache.hadoop.hdfs.server.common.Storage.StorageDirType -->
<interface name="Storage.StorageDirType" abstract="true"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<method name="getStorageDirType" return="org.apache.hadoop.hdfs.server.common.Storage.StorageDirType"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isOfType" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="type" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirType"/>
</method>
<doc>
<![CDATA[An interface to denote storage directory type
Implementations can define a type for storage directory by implementing
this interface.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.common.Storage.StorageDirType -->
<!-- start class org.apache.hadoop.hdfs.server.common.Storage.StorageState -->
<class name="Storage.StorageState" extends="java.lang.Enum"
abstract="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<method name="values" return="org.apache.hadoop.hdfs.server.common.Storage.StorageState[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="valueOf" return="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<field name="NON_EXISTENT" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="NOT_FORMATTED" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="COMPLETE_UPGRADE" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RECOVER_UPGRADE" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="COMPLETE_FINALIZE" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="COMPLETE_ROLLBACK" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RECOVER_ROLLBACK" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="COMPLETE_CHECKPOINT" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RECOVER_CHECKPOINT" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="NORMAL" type="org.apache.hadoop.hdfs.server.common.Storage.StorageState"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.Storage.StorageState -->
<!-- start class org.apache.hadoop.hdfs.server.common.StorageInfo -->
<class name="StorageInfo" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="StorageInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="StorageInfo" type="int, int, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="StorageInfo" type="org.apache.hadoop.hdfs.server.common.StorageInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getLayoutVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Layout version of the storage data.]]>
</doc>
</method>
<method name="getNamespaceID" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Namespace id of the file system.<p>
Assigned to the file system at formatting and never changes after that.
Shared by all file system components.]]>
</doc>
</method>
<method name="getCTime" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Creation time of the file system state.<p>
Modified during upgrades.]]>
</doc>
</method>
<method name="setStorageInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="from" type="org.apache.hadoop.hdfs.server.common.StorageInfo"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="layoutVersion" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="namespaceID" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="cTime" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Common class for storage information.
TODO namespaceID should be long and computed as hash(address + port)]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.StorageInfo -->
<!-- start interface org.apache.hadoop.hdfs.server.common.Upgradeable -->
<interface name="Upgradeable" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.lang.Comparable"/>
<method name="getVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the layout version of the upgrade object.
@return layout version]]>
</doc>
</method>
<method name="getType" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the type of the software component, which this object is upgrading.
@return type]]>
</doc>
</method>
<method name="getDescription" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Description of the upgrade object for displaying.
@return description]]>
</doc>
</method>
<method name="getUpgradeStatus" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Upgrade status determines a percentage of the work done out of the total
amount required by the upgrade.
100% means that the upgrade is completed.
Any value < 100 means it is not complete.
The return value should provide at least 2 values, e.g. 0 and 100.
@return integer value in the range [0, 100].]]>
</doc>
</method>
<method name="startUpgrade" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Prepare for the upgrade.
E.g. initialize upgrade data structures and set status to 0.
Returns an upgrade command that is used for broadcasting to other cluster
components.
E.g. name-node informs data-nodes that they must perform a distributed upgrade.
@return an UpgradeCommand for broadcasting.
@throws IOException]]>
</doc>
</method>
<method name="completeUpgrade" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Complete upgrade.
E.g. cleanup upgrade data structures or write metadata to disk.
Returns an upgrade command that is used for broadcasting to other cluster
components.
E.g. data-nodes inform the name-node that they completed the upgrade
while other data-nodes are still upgrading.
@throws IOException]]>
</doc>
</method>
<method name="getUpgradeStatusReport" return="org.apache.hadoop.hdfs.server.common.UpgradeStatusReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="details" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get status report for the upgrade.
@param details true if upgradeStatus details need to be included,
false otherwise
@return {@link UpgradeStatusReport}
@throws IOException]]>
</doc>
</method>
<doc>
<![CDATA[Common interface for distributed upgrade objects.
Each upgrade object corresponds to a layout version,
which is the latest version that should be upgraded using this object.
That is all components whose layout version is greater or equal to the
one returned by {@link #getVersion()} must be upgraded with this object.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.common.Upgradeable -->
<!-- start class org.apache.hadoop.hdfs.server.common.UpgradeManager -->
<class name="UpgradeManager" extends="java.lang.Object"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="UpgradeManager"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getBroadcastCommand" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getUpgradeState" return="boolean"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getUpgradeVersion" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setUpgradeState"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="uState" type="boolean"/>
<param name="uVersion" type="int"/>
</method>
<method name="getDistributedUpgrades" return="java.util.SortedSet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getUpgradeStatus" return="short"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="initializeUpgrade" return="boolean"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="isUpgradeCompleted" return="boolean"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getType" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="startUpgrade" return="boolean"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="completeUpgrade"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="currentUpgrades" type="java.util.SortedSet"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="upgradeState" type="boolean"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="upgradeVersion" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="broadcastCommand" type="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Generic upgrade manager.
{@link #broadcastCommand} is the command that should be]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.UpgradeManager -->
<!-- start class org.apache.hadoop.hdfs.server.common.UpgradeObject -->
<class name="UpgradeObject" extends="java.lang.Object"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.server.common.Upgradeable"/>
<constructor name="UpgradeObject"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getUpgradeStatus" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDescription" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getUpgradeStatusReport" return="org.apache.hadoop.hdfs.server.common.UpgradeStatusReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="details" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="compareTo" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="org.apache.hadoop.hdfs.server.common.Upgradeable"/>
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="status" type="short"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Abstract upgrade object.
Contains default implementation of common methods of {@link Upgradeable}
interface.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.UpgradeObject -->
<!-- start class org.apache.hadoop.hdfs.server.common.UpgradeObjectCollection -->
<class name="UpgradeObjectCollection" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="UpgradeObjectCollection"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getDistributedUpgrades" return="java.util.SortedSet"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="versionFrom" type="int"/>
<param name="type" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Collection of upgrade objects.
Upgrade objects should be registered here before they can be used.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.UpgradeObjectCollection -->
<!-- start class org.apache.hadoop.hdfs.server.common.UpgradeStatusReport -->
<class name="UpgradeStatusReport" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="UpgradeStatusReport"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="UpgradeStatusReport" type="int, short, boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the layout version of the currently running upgrade.
@return layout version]]>
</doc>
</method>
<method name="getUpgradeStatus" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get upgrade upgradeStatus as a percentage of the total upgrade done.
@see Upgradeable#getUpgradeStatus()]]>
</doc>
</method>
<method name="isFinalized" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Is current upgrade finalized.
@return true if finalized or false otherwise.]]>
</doc>
</method>
<method name="getStatusText" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="details" type="boolean"/>
<doc>
<![CDATA[Get upgradeStatus data as a text for reporting.
Should be overloaded for a particular upgrade specific upgradeStatus data.
@param details true if upgradeStatus details need to be included,
false otherwise
@return text]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Print basic upgradeStatus details.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="version" type="int"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="upgradeStatus" type="short"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="finalized" type="boolean"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Base upgrade upgradeStatus class.
Overload this class if specific status fields need to be reported.
Describes status of current upgrade.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.UpgradeStatusReport -->
<!-- start class org.apache.hadoop.hdfs.server.common.Util -->
<class name="Util" extends="java.lang.Object"
abstract="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
<constructor name="Util"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="now" return="long"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Current system time.
@return current time in msec.]]>
</doc>
</method>
<method name="stringAsURI" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="s" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Interprets the passed string as a URI. In case of error it
assumes the specified string is a file.
@param s the string to interpret
@return the resulting URI
@throws IOException]]>
</doc>
</method>
<method name="fileAsURI" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="f" type="java.io.File"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Converts the passed File to a URI.
@param f the file to convert
@return the resulting URI
@throws IOException]]>
</doc>
</method>
<method name="stringCollectionAsURIs" return="java.util.Collection"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="names" type="java.util.Collection"/>
<doc>
<![CDATA[Converts a collection of strings into a collection of URIs.
@param names collection of strings to convert to URIs
@return collection of URIs]]>
</doc>
</method>
</class>
<!-- end class org.apache.hadoop.hdfs.server.common.Util -->
</package>
<package name="org.apache.hadoop.hdfs.server.datanode">
<!-- start class org.apache.hadoop.hdfs.server.datanode.DataNode -->
<class name="DataNode" extends="org.apache.hadoop.conf.Configured"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol"/>
<implements name="org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol"/>
<implements name="org.apache.hadoop.hdfs.protocol.FSConstants"/>
<implements name="java.lang.Runnable"/>
<implements name="org.apache.hadoop.hdfs.server.datanode.DataNodeMXBean"/>
<method name="createSocketAddr" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Use {@link NetUtils#createSocketAddr(String)} instead.]]>
</doc>
</method>
<method name="getInfoAddr" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<doc>
<![CDATA[Determine the http server's effective addr]]>
</doc>
</method>
<method name="newSocket" return="java.net.Socket"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Creates either NIO or regular depending on socketWriteTimeout.]]>
</doc>
</method>
<method name="getDataNode" return="org.apache.hadoop.hdfs.server.datanode.DataNode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return the DataNode object]]>
</doc>
</method>
<method name="createInterDataNodeProtocolProxy" return="org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="datanodeid" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="socketTimeout" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getNameNodeAddr" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getNameNodeAddrForClient" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getSelfAddr" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDatanodeRegistration" return="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return DatanodeRegistration]]>
</doc>
</method>
<method name="setNewStorageID"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="dnReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
</method>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Shut down this instance of the datanode.
Returns only after shutdown is complete.
This method can only be called by the offerService thread.
Otherwise, deadlock might occur.]]>
</doc>
</method>
<method name="checkDiskError"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="e" type="java.lang.Exception"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Check if there is no space in disk
@param e that caused this checkDiskError call]]>
</doc>
</method>
<method name="checkDiskError"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[Check if there is a disk failure and if so, handle the error]]>
</doc>
</method>
<method name="offerService"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[Main loop for the DataNode. Runs until shutdown,
forever calling remote NameNode functions.]]>
</doc>
</method>
<method name="notifyNamenodeReceivedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="delHint" type="java.lang.String"/>
</method>
<method name="run"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[No matter what kind of exception we get, keep retrying to offerService().
That's the loop that connects to the NameNode and provides basic DataNode
functionality.
Only stop when "shouldRun" is turned off (which can only happen at shutdown).]]>
</doc>
</method>
<method name="runDatanodeDaemon"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="dn" type="org.apache.hadoop.hdfs.server.datanode.DataNode"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Start a single datanode daemon and wait for it to finish.
If this thread is specifically interrupted, it will stop waiting.]]>
</doc>
</method>
<method name="instantiateDataNode" return="org.apache.hadoop.hdfs.server.datanode.DataNode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Instantiate a single datanode object. This must be run by invoking
{@link DataNode#runDatanodeDaemon(DataNode)} subsequently.]]>
</doc>
</method>
<method name="instantiateDataNode" return="org.apache.hadoop.hdfs.server.datanode.DataNode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="resources" type="org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Instantiate a single datanode object, along with its secure resources.
This must be run by invoking{@link DataNode#runDatanodeDaemon(DataNode)}
subsequently.]]>
</doc>
</method>
<method name="createDataNode" return="org.apache.hadoop.hdfs.server.datanode.DataNode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Instantiate & Start a single datanode daemon and wait for it to finish.
If this thread is specifically interrupted, it will stop waiting.]]>
</doc>
</method>
<method name="createDataNode" return="org.apache.hadoop.hdfs.server.datanode.DataNode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="resources" type="org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Instantiate & Start a single datanode daemon and wait for it to finish.
If this thread is specifically interrupted, it will stop waiting.]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="scheduleBlockReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="delay" type="long"/>
<doc>
<![CDATA[This methods arranges for the data node to send the block report at the next heartbeat.]]>
</doc>
</method>
<method name="getFSDataset" return="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[This method is used for testing.
Examples are adding and deleting blocks directly.
The most common usage will be when the data node's storage is similated.
@return the fsdataset that stores the blocks]]>
</doc>
</method>
<method name="secureMain"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<param name="resources" type="org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources"/>
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
</method>
<method name="recoverBlocks" return="org.apache.hadoop.util.Daemon"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blocks" type="java.util.Collection"/>
</method>
<method name="initReplicaRecovery" return="org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="rBlock" type="org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="updateReplicaUnderRecovery" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="oldBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="recoveryId" type="long"/>
<param name="newLength" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update replica with the new generation stamp and length.]]>
</doc>
</method>
<method name="getProtocolVersion" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="protocol" type="java.lang.String"/>
<param name="clientVersion" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getReplicaVisibleLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getStreamingAddr" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="getVersion" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getRpcPort" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getHttpPort" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getInfoPort" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getNamenodeAddress" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getVolumeInfo" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returned information is a JSON representation of a map with
volume name as the key and value is a map of volume attribute
keys to its values]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DN_CLIENTTRACE_FORMAT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="namenode" type="org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="data" type="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="dnRegistration" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="EMPTY_DEL_HINT" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockScanner" type="org.apache.hadoop.hdfs.server.datanode.DataBlockScanner"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockScannerThread" type="org.apache.hadoop.util.Daemon"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="ipcServer" type="org.apache.hadoop.ipc.Server"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[DataNode is a class (and program) that stores a set of
blocks for a DFS deployment. A single deployment can
have one or many DataNodes. Each DataNode communicates
regularly with a single NameNode. It also communicates
with client code and other DataNodes from time to time.
DataNodes store a series of named blocks. The DataNode
allows client code to read these blocks, or to write new
block data. The DataNode may also, in response to instructions
from its NameNode, delete blocks or copy blocks to/from other
DataNodes.
The DataNode maintains just one critical table:
block-> stream of bytes (of BLOCK_SIZE or less)
This info is stored on a local disk. The DataNode
reports the table's contents to the NameNode upon startup
and every so often afterwards.
DataNodes spend their lives in an endless loop of asking
the NameNode for something to do. A NameNode cannot connect
to a DataNode directly; a NameNode simply returns values from
functions invoked by a DataNode.
DataNodes maintain an open server socket so that client code
or other DataNodes can read/write data. The host/port for
this server is reported to the NameNode, which then sends that
information to clients or other DataNodes that might be interested.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.DataNode -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.DatanodeJspHelper -->
<class name="DatanodeJspHelper" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DatanodeJspHelper"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.DatanodeJspHelper -->
<!-- start interface org.apache.hadoop.hdfs.server.datanode.DataNodeMXBean -->
<interface name="DataNodeMXBean" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getVersion" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the version of Hadoop.
@return the version of Hadoop]]>
</doc>
</method>
<method name="getRpcPort" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the rpc port.
@return the rpc port]]>
</doc>
</method>
<method name="getHttpPort" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the http port.
@return the http port]]>
</doc>
</method>
<method name="getNamenodeAddress" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the namenode IP address.
@return the namenode IP address]]>
</doc>
</method>
<method name="getVolumeInfo" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the information of each volume on the Datanode. Please
see the implementation for the format of returned information.
@return the volume info]]>
</doc>
</method>
<doc>
<![CDATA[This is the JMX management interface for data node information]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.datanode.DataNodeMXBean -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.DataStorage -->
<class name="DataStorage" extends="org.apache.hadoop.hdfs.server.common.Storage"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DataStorage" type="org.apache.hadoop.hdfs.server.common.StorageInfo, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getStorageID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="props" type="java.util.Properties"/>
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="props" type="java.util.Properties"/>
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="isPreUpgradableLayout" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Data storage information file.
<p>
@see Storage]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.DataStorage -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.DirectoryScanner -->
<class name="DirectoryScanner" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Periodically scans the data directories for block and block metadata files.
Reconciles the differences with block information maintained in
{@link FSDataset}]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.DirectoryScanner -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.FSDataset -->
<class name="FSDataset" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.protocol.FSConstants"/>
<implements name="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface"/>
<constructor name="FSDataset" type="org.apache.hadoop.hdfs.server.datanode.DataStorage, org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[An FSDataset has a directory where it loads its data files.]]>
</doc>
</constructor>
<method name="getMetaFile" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="findBlockFile" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blockId" type="long"/>
<doc>
<![CDATA[Return the block file for the given ID]]>
</doc>
</method>
<method name="getStoredBlock" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blkid" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="metaFileExists" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getMetaDataLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getMetaDataInputStream" return="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.MetaDataInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getDfsUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return the total space used by dfs datanode]]>
</doc>
</method>
<method name="hasEnoughResource" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return true - if there are still valid volumes on the DataNode.]]>
</doc>
</method>
<method name="getCapacity" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return total capacity, used and unused]]>
</doc>
</method>
<method name="getRemaining" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Return how many bytes can still be stored in the FSDataset]]>
</doc>
</method>
<method name="getNumFailedVolumes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return the number of failed volumes in the FSDataset.]]>
</doc>
</method>
<method name="getLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Find the block's on-disk length]]>
</doc>
</method>
<method name="getBlockFile" return="java.io.File"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get File name for a given block.]]>
</doc>
</method>
<method name="getBlockInputStream" return="java.io.InputStream"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getBlockInputStream" return="java.io.InputStream"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="seekOffset" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getTmpInputStreams" return="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockInputStreams"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blkOffset" type="long"/>
<param name="ckoff" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns handles to the block file and its metadata file]]>
</doc>
</method>
<method name="unlinkBlock" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="numLinks" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Make a copy of the block if this block is linked to an existing
snapshot. This ensures that modifying this block does not modify
data in any existing snapshots.
@param block Block
@param numLinks Unlink if the number of links exceed this value
@throws IOException
@return - true if the specified block was unlinked or the block
is not in any snapshot.]]>
</doc>
</method>
<method name="append" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="expectedBlockLen" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="recoverAppend" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="expectedBlockLen" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="recoverClose"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="expectedBlockLen" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="createRbw" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="recoverRbw" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="minBytesRcvd" type="long"/>
<param name="maxBytesRcvd" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="createTemporary" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="adjustCrcChannelPosition"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="streams" type="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockWriteStreams"/>
<param name="checksumSize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Sets the offset in the meta file so that the
last checksum will be overwritten.]]>
</doc>
</method>
<method name="finalizeBlock"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Complete the block write!]]>
</doc>
</method>
<method name="unfinalizeBlock"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Remove the temporary block file (if any)]]>
</doc>
</method>
<method name="getBlockReport" return="org.apache.hadoop.hdfs.protocol.BlockListAsLongs"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Generates a block report from the in-memory block map.]]>
</doc>
</method>
<method name="isValidBlock" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<doc>
<![CDATA[Check whether the given block is a valid one.
valid means finalized]]>
</doc>
</method>
<method name="invalidate"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="invalidBlks" type="org.apache.hadoop.hdfs.protocol.Block[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[We're informed that a block is no longer valid. We
could lazily garbage-collect the block, but why bother?
just get rid of it.]]>
</doc>
</method>
<method name="getFile" return="java.io.File"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<doc>
<![CDATA[Turn the block identifier into a filename; ignore generation stamp!!!]]>
</doc>
</method>
<method name="checkDataDir"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="DiskChecker.DiskErrorException" type="org.apache.hadoop.util.DiskChecker.DiskErrorException"/>
<doc>
<![CDATA[check if a data directory is healthy
if some volumes failed - make sure to remove all the blocks that belong
to these volumes
@throws DiskErrorException]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getStorageInfo" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="checkAndUpdate"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blockId" type="long"/>
<param name="diskFile" type="java.io.File"/>
<param name="diskMetaFile" type="java.io.File"/>
<param name="vol" type="org.apache.hadoop.hdfs.server.datanode.FSDataset.FSVolume"/>
<doc>
<![CDATA[Reconcile the difference between blocks on the disk and blocks in
volumeMap
Check the given block for inconsistencies. Look at the
current state of the block and reconcile the differences as follows:
<ul>
<li>If the block file is missing, delete the block from volumeMap</li>
<li>If the block file exists and the block is missing in volumeMap,
add the block to volumeMap <li>
<li>If generation stamp does not match, then update the block with right
generation stamp</li>
<li>If the block length in memory does not match the actual block file length
then mark the block as corrupt and update the block length in memory</li>
<li>If the file in {@link ReplicaInfo} does not match the file on
the disk, update {@link ReplicaInfo} with the correct file</li>
</ul>
@param blockId Block that differs
@param diskFile Block file on the disk
@param diskMetaFile Metadata file from on the disk
@param vol Volume of the block file]]>
</doc>
</method>
<method name="getReplica" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="use {@link #fetchReplicaInfo(long)} instead.">
<param name="blockId" type="long"/>
<doc>
<![CDATA[@deprecated use {@link #fetchReplicaInfo(long)} instead.]]>
</doc>
</method>
<method name="initReplicaRecovery" return="org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="rBlock" type="org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="updateReplicaUnderRecovery" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInfo"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="oldBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="recoveryId" type="long"/>
<param name="newlength" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getReplicaVisibleLength" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="METADATA_EXTENSION" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="METADATA_VERSION" type="short"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[FSDataset manages a set of data blocks. Each block
has a unique name and an extent on disk.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.FSDataset -->
<!-- start interface org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface -->
<interface name="FSDatasetInterface" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.server.datanode.metrics.FSDatasetMBean"/>
<method name="getMetaDataLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the length of the metadata file of the specified block
@param b - the block for which the metadata length is desired
@return the length of the metadata file for the specified block.
@throws IOException]]>
</doc>
</method>
<method name="getMetaDataInputStream" return="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.MetaDataInputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns metaData of block b as an input stream (and its length)
@param b - the block
@return the metadata input stream;
@throws IOException]]>
</doc>
</method>
<method name="metaFileExists" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Does the meta file exist for this block?
@param b - the block
@return true of the metafile for specified block exits
@throws IOException]]>
</doc>
</method>
<method name="getLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the specified block's on-disk length (excluding metadata)
@param b
@return the specified block's on-disk length (excluding metadta)
@throws IOException]]>
</doc>
</method>
<method name="getReplica" return="org.apache.hadoop.hdfs.server.datanode.Replica"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blockId" type="long"/>
<doc>
<![CDATA[Get reference to the replica meta info in the replicasMap.
To be called from methods that are synchronized on {@link FSDataset}
@param blockId
@return replica from the replicas map]]>
</doc>
</method>
<method name="getStoredBlock" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blkid" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@return the generation stamp stored with the block.]]>
</doc>
</method>
<method name="getBlockInputStream" return="java.io.InputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns an input stream to read the contents of the specified block
@param b
@return an input stream to read the contents of the specified block
@throws IOException]]>
</doc>
</method>
<method name="getBlockInputStream" return="java.io.InputStream"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="seekOffset" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns an input stream at specified offset of the specified block
@param b
@param seekOffset
@return an input stream to read the contents of the specified block,
starting at the offset
@throws IOException]]>
</doc>
</method>
<method name="getTmpInputStreams" return="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockInputStreams"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="blkoff" type="long"/>
<param name="ckoff" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns an input stream at specified offset of the specified block
The block is still in the tmp directory and is not finalized
@param b
@param blkoff
@param ckoff
@return an input stream to read the contents of the specified block,
starting at the offset
@throws IOException]]>
</doc>
</method>
<method name="createTemporary" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Creates a temporary replica and returns the meta information of the replica
@param b block
@return the meta info of the replica which is being written to
@throws IOException if an error occurs]]>
</doc>
</method>
<method name="createRbw" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Creates a RBW replica and returns the meta info of the replica
@param b block
@return the meta info of the replica which is being written to
@throws IOException if an error occurs]]>
</doc>
</method>
<method name="recoverRbw" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="minBytesRcvd" type="long"/>
<param name="maxBytesRcvd" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Recovers a RBW replica and returns the meta info of the replica
@param b block
@param newGS the new generation stamp for the replica
@param minBytesRcvd the minimum number of bytes that the replica could have
@param maxBytesRcvd the maximum number of bytes that the replica could have
@return the meta info of the replica which is being written to
@throws IOException if an error occurs]]>
</doc>
</method>
<method name="append" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="expectedBlockLen" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Append to a finalized replica and returns the meta info of the replica
@param b block
@param newGS the new generation stamp for the replica
@param expectedBlockLen the number of bytes the replica is expected to have
@return the meata info of the replica which is being written to
@throws IOException]]>
</doc>
</method>
<method name="recoverAppend" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInPipelineInterface"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="expectedBlockLen" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Recover a failed append to a finalized replica
and returns the meta info of the replica
@param b block
@param newGS the new generation stamp for the replica
@param expectedBlockLen the number of bytes the replica is expected to have
@return the meta info of the replica which is being written to
@throws IOException]]>
</doc>
</method>
<method name="recoverClose"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newGS" type="long"/>
<param name="expectedBlockLen" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Recover a failed pipeline close
It bumps the replica's generation stamp and finalize it if RBW replica
@param b block
@param newGS the new generation stamp for the replica
@param expectedBlockLen the number of bytes the replica is expected to have
@throws IOException]]>
</doc>
</method>
<method name="finalizeBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Finalizes the block previously opened for writing using writeToBlock.
The block size is what is in the parameter b and it must match the amount
of data written
@param b
@throws IOException]]>
</doc>
</method>
<method name="unfinalizeBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Unfinalizes the block previously opened for writing using writeToBlock.
The temporary file associated with this block is deleted.
@param b
@throws IOException]]>
</doc>
</method>
<method name="getBlockReport" return="org.apache.hadoop.hdfs.protocol.BlockListAsLongs"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the block report - the full list of blocks stored
@return - the block report - the full list of blocks stored]]>
</doc>
</method>
<method name="isValidBlock" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<doc>
<![CDATA[Is the block valid?
@param b
@return - true if the specified block is valid]]>
</doc>
</method>
<method name="invalidate"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="invalidBlks" type="org.apache.hadoop.hdfs.protocol.Block[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Invalidates the specified blocks
@param invalidBlks - the blocks to be invalidated
@throws IOException]]>
</doc>
</method>
<method name="checkDataDir"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="DiskChecker.DiskErrorException" type="org.apache.hadoop.util.DiskChecker.DiskErrorException"/>
<doc>
<![CDATA[Check if all the data directories are healthy
@throws DiskErrorException]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Stringifies the name of the storage]]>
</doc>
</method>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Shutdown the FSDataset]]>
</doc>
</method>
<method name="adjustCrcChannelPosition"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="stream" type="org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockWriteStreams"/>
<param name="checksumSize" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Sets the file pointer of the checksum stream so that the last checksum
will be overwritten
@param b block
@param stream The stream for the data file and checksum file
@param checksumSize number of bytes each checksum has
@throws IOException]]>
</doc>
</method>
<method name="hasEnoughResource" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Checks how many valid storage volumes there are in the DataNode.
@return true if more than the minimum number of valid volumes are left
in the FSDataSet.]]>
</doc>
</method>
<method name="getReplicaVisibleLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get visible length of the specified replica.]]>
</doc>
</method>
<method name="initReplicaRecovery" return="org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="rBlock" type="org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Initialize a replica recovery.
@return actual state of the replica on this data-node or
null if data-node does not have the replica.]]>
</doc>
</method>
<method name="updateReplicaUnderRecovery" return="org.apache.hadoop.hdfs.server.datanode.ReplicaInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="oldBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="recoveryId" type="long"/>
<param name="newLength" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update replica's generation stamp and length and finalize it.]]>
</doc>
</method>
<doc>
<![CDATA[This is an interface for the underlying storage that stores blocks for
a data node.
Examples are the FSDataset (which stores blocks on dirs) and
SimulatedFSDataset (which simulates data).]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockInputStreams -->
<class name="FSDatasetInterface.BlockInputStreams" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.io.Closeable"/>
<method name="close"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[This class contains the input streams for the data and checksum
of a block]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockInputStreams -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockWriteStreams -->
<class name="FSDatasetInterface.BlockWriteStreams" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[This class contains the output streams for the data and checksum
of a block]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.BlockWriteStreams -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.MetaDataInputStream -->
<class name="FSDatasetInterface.MetaDataInputStream" extends="java.io.FilterInputStream"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<method name="getLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[This class provides the input stream and length of the metadata
of a block]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.FSDatasetInterface.MetaDataInputStream -->
<!-- start interface org.apache.hadoop.hdfs.server.datanode.Replica -->
<interface name="Replica" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getBlockId" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the block ID]]>
</doc>
</method>
<method name="getGenerationStamp" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the generation stamp]]>
</doc>
</method>
<method name="getState" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the replica state
@return the replica state]]>
</doc>
</method>
<method name="getNumBytes" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the number of bytes received
@return the number of bytes that have been received]]>
</doc>
</method>
<method name="getBytesOnDisk" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the number of bytes that have written to disk
@return the number of bytes that have written to disk]]>
</doc>
</method>
<method name="getVisibleLength" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the number of bytes that are visible to readers
@return the number of bytes that are visible to readers]]>
</doc>
</method>
<doc>
<![CDATA[This represents block replicas which are stored in DataNode.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.datanode.Replica -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.ReplicaInfo -->
<class name="ReplicaInfo" extends="org.apache.hadoop.hdfs.protocol.Block"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.server.datanode.Replica"/>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[This class is used by datanodes to maintain meta data of its replicas.
It provides a general interface for meta information of a replica.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.ReplicaInfo -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException -->
<class name="ReplicaNotFoundException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="ReplicaNotFoundException"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="ReplicaNotFoundException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[Exception indicating that DataNode does not have a replica
that matches the target block.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter -->
<class name="SecureDataNodeStarter" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.commons.daemon.Daemon"/>
<constructor name="SecureDataNodeStarter"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="init"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="context" type="org.apache.commons.daemon.DaemonContext"/>
<exception name="Exception" type="java.lang.Exception"/>
</method>
<method name="start"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="Exception" type="java.lang.Exception"/>
</method>
<method name="destroy"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="stop"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="Exception" type="java.lang.Exception"/>
</method>
<doc>
<![CDATA[Utility class to start a datanode in a secure cluster, first obtaining
privileged resources before main startup and handing them to the datanode.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources -->
<class name="SecureDataNodeStarter.SecureResources" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="SecureDataNodeStarter.SecureResources" type="java.net.ServerSocket, org.mortbay.jetty.nio.SelectChannelConnector"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getStreamingSocket" return="java.net.ServerSocket"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getListener" return="org.mortbay.jetty.nio.SelectChannelConnector"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[Stash necessary resources needed for datanode operation in a secure env.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.UpgradeObjectDatanode -->
<class name="UpgradeObjectDatanode" extends="org.apache.hadoop.hdfs.server.common.UpgradeObject"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.lang.Runnable"/>
<constructor name="UpgradeObjectDatanode"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getType" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDatanode" return="org.apache.hadoop.hdfs.server.datanode.DataNode"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</method>
<method name="doUpgrade"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Specifies how the upgrade is performed.
@throws IOException]]>
</doc>
</method>
<method name="run"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="completeUpgrade" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Complete upgrade and return a status complete command for broadcasting.
Data-nodes finish upgrade at different times.
The data-node needs to re-confirm with the name-node that the upgrade
is complete while other nodes are still upgrading.]]>
</doc>
</method>
<doc>
<![CDATA[Base class for data-node upgrade objects.
Data-node upgrades are run in separate threads.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.UpgradeObjectDatanode -->
</package>
<package name="org.apache.hadoop.hdfs.server.datanode.metrics">
<!-- start class org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeActivityMBean -->
<class name="DataNodeActivityMBean" extends="org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DataNodeActivityMBean" type="org.apache.hadoop.metrics.util.MetricsRegistry, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[This is the JMX MBean for reporting the DataNode Activity.
The MBean is register using the name
"hadoop:service=DataNode,name=DataNodeActivity-<hostname>-<portNumber>"
Many of the activity metrics are sampled and averaged on an interval
which can be specified in the metrics config file.
<p>
For the metrics that are sampled and averaged, one must specify
a metrics context that does periodic update calls. Most metrics contexts do.
The default Null metrics context however does NOT. So if you aren't
using any other metrics context then you can turn on the viewing and averaging
of sampled metrics by specifying the following two lines
in the hadoop-meterics.properties file:
<pre>
dfs.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread
dfs.period=10
</pre>
<p>
Note that the metrics are collected regardless of the context used.
The context with the update thread is used to average the data periodically
Impl details: We use a dynamic mbean that gets the list of the metrics
from the metrics registry passed as an argument to the constructor]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeActivityMBean -->
<!-- start class org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeMetrics -->
<class name="DataNodeMetrics" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.metrics.Updater"/>
<constructor name="DataNodeMetrics" type="org.apache.hadoop.conf.Configuration, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="doUpdates"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="unused" type="org.apache.hadoop.metrics.MetricsContext"/>
<doc>
<![CDATA[Since this object is a registered updater, this method will be called
periodically, e.g. every 5 seconds.]]>
</doc>
</method>
<method name="resetAllMinMax"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="registry" type="org.apache.hadoop.metrics.util.MetricsRegistry"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="bytesWritten" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingLong"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="bytesRead" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingLong"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blocksWritten" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blocksRead" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blocksReplicated" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blocksRemoved" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blocksVerified" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockVerificationFailures" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="readsFromLocalClient" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="readsFromRemoteClient" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="writesFromLocalClient" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="writesFromRemoteClient" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="volumeFailures" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="readBlockOp" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="writeBlockOp" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockChecksumOp" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="copyBlockOp" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="replaceBlockOp" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="heartbeats" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockReports" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[This class is for maintaining the various DataNode statistics
and publishing them through the metrics interfaces.
This also registers the JMX MBean for RPC.
<p>
This class has a number of metrics variables that are publicly accessible;
these variables (objects) have methods to update their values;
for example:
<p> {@link #blocksRead}.inc()]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeMetrics -->
<!-- start interface org.apache.hadoop.hdfs.server.datanode.metrics.FSDatasetMBean -->
<interface name="FSDatasetMBean" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getDfsUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the total space (in bytes) used by dfs datanode
@return the total space used by dfs datanode
@throws IOException]]>
</doc>
</method>
<method name="getCapacity" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns total capacity (in bytes) of storage (used and unused)
@return total capacity of storage (used and unused)
@throws IOException]]>
</doc>
</method>
<method name="getRemaining" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the amount of free storage space (in bytes)
@return The amount of free storage space
@throws IOException]]>
</doc>
</method>
<method name="getStorageInfo" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the storage id of the underlying storage]]>
</doc>
</method>
<method name="getNumFailedVolumes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the number of failed volumes in the datanode.
@return The number of failed volumes in the datanode.]]>
</doc>
</method>
<doc>
<![CDATA[This Interface defines the methods to get the status of a the FSDataset of
a data node.
It is also used for publishing via JMX (hence we follow the JMX naming
convention.)
* Note we have not used the MetricsDynamicMBeanBase to implement this
because the interface for the FSDatasetMBean is stable and should
be published as an interface.
<p>
Data Node runtime statistic info is report in another MBean
@see org.apache.hadoop.hdfs.server.datanode.metrics.DataNodeActivityMBean]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.datanode.metrics.FSDatasetMBean -->
</package>
<package name="org.apache.hadoop.hdfs.server.namenode">
<!-- start class org.apache.hadoop.hdfs.server.namenode.BackupNode -->
<class name="BackupNode" extends="org.apache.hadoop.hdfs.server.namenode.NameNode"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getRpcServerAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getServiceRpcServerAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setRpcServerAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="setRpcServiceServerAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="getHttpServerAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="setHttpServerAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="loadNamesystem"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="initialize"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="stop"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="setSafeMode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getBlocks" return="org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="datanode" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="size" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="register" return="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="startCheckpoint" return="org.apache.hadoop.hdfs.server.protocol.NamenodeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="endCheckpoint"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="sig" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="journal"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nnReg" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="jAction" type="int"/>
<param name="length" type="int"/>
<param name="args" type="byte[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[BackupNode.
<p>
Backup node can play two roles.
<ol>
<li>{@link NamenodeRole#CHECKPOINT} node periodically creates checkpoints,
that is downloads image and edits from the active node, merges them, and
uploads the new image back to the active.</li>
<li>{@link NamenodeRole#BACKUP} node keeps its namespace in sync with the
active node, and periodically creates checkpoints by simply saving the
namespace image to local disk(s).</li>
</ol>]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.BackupNode -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.BackupStorage -->
<class name="BackupStorage" extends="org.apache.hadoop.hdfs.server.namenode.FSImage"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="isPreUpgradableLayout" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.BackupStorage -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.BlockManager -->
<class name="BlockManager" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="processReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="node" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"/>
<param name="report" type="org.apache.hadoop.hdfs.protocol.BlockListAsLongs"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The given node is reporting all its blocks. Use this info to
update the (machine-->blocklist) and (block-->machinelist) tables.]]>
</doc>
</method>
<field name="DEFAULT_INITIAL_MAP_CAPACITY" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_MAP_LOAD_FACTOR" type="float"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DEFAULT_MAX_CORRUPT_FILES_RETURNED" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Keeps information related to the blocks stored in the Hadoop cluster.
This class is a helper class for {@link FSNamesystem} and requires several
methods to be called with lock held on {@link FSNamesystem}.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.BlockManager -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy -->
<class name="BlockPlacementPolicy" extends="java.lang.Object"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockPlacementPolicy"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="verifyBlockPlacement" return="int"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="srcPath" type="java.lang.String"/>
<param name="lBlk" type="org.apache.hadoop.hdfs.protocol.LocatedBlock"/>
<param name="minRacks" type="int"/>
<doc>
<![CDATA[Verify that the block is replicated on at least minRacks different racks
if there is more than minRacks rack in the system.
@param srcPath the full pathname of the file to be verified
@param lBlk block with locations
@param minRacks number of racks the block should be replicated to
@return the difference between the required and the actual number of racks
the block is replicated to.]]>
</doc>
</method>
<method name="chooseReplicaToDelete" return="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="srcInode" type="org.apache.hadoop.hdfs.server.namenode.FSInodeInfo"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="replicationFactor" type="short"/>
<param name="existingReplicas" type="java.util.Collection"/>
<param name="moreExistingReplicas" type="java.util.Collection"/>
<doc>
<![CDATA[Decide whether deleting the specified replica of the block still makes
the block conform to the configured block placement policy.
@param srcInode The inode of the file to which the block-to-be-deleted belongs
@param block The block to be deleted
@param replicationFactor The required number of replicas for this block
@param existingReplicas The replica locations of this block that are present
on at least two unique racks.
@param moreExistingReplicas Replica locations of this block that are not
listed in the previous parameter.
@return the replica that is the best candidate for deletion]]>
</doc>
</method>
<method name="initialize"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="stats" type="org.apache.hadoop.hdfs.server.namenode.FSClusterStats"/>
<param name="clusterMap" type="org.apache.hadoop.net.NetworkTopology"/>
<doc>
<![CDATA[Used to setup a BlockPlacementPolicy object. This should be defined by
all implementations of a BlockPlacementPolicy.
@param conf the configuration object
@param stats retrieve cluster status from here
@param clusterMap cluster topology]]>
</doc>
</method>
<method name="getInstance" return="org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="stats" type="org.apache.hadoop.hdfs.server.namenode.FSClusterStats"/>
<param name="clusterMap" type="org.apache.hadoop.net.NetworkTopology"/>
<doc>
<![CDATA[Get an instance of the configured Block Placement Policy based on the
value of the configuration paramater dfs.block.replicator.classname.
@param conf the configuration to be used
@param stats an object that is used to retrieve the load on the cluster
@param clusterMap the network topology of the cluster
@return an instance of BlockPlacementPolicy]]>
</doc>
</method>
<doc>
<![CDATA[This interface is used for choosing the desired number of targets
for placing block replicas.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy.NotEnoughReplicasException -->
<class name="BlockPlacementPolicy.NotEnoughReplicasException" extends="java.lang.Exception"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy.NotEnoughReplicasException -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicyDefault -->
<class name="BlockPlacementPolicyDefault" extends="org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicy"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="initialize"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="stats" type="org.apache.hadoop.hdfs.server.namenode.FSClusterStats"/>
<param name="clusterMap" type="org.apache.hadoop.net.NetworkTopology"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="chooseTarget" return="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="srcPath" type="java.lang.String"/>
<param name="numOfReplicas" type="int"/>
<param name="writer" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"/>
<param name="chosenNodes" type="java.util.List"/>
<param name="blocksize" type="long"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="chooseTarget" return="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="srcPath" type="java.lang.String"/>
<param name="numOfReplicas" type="int"/>
<param name="writer" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"/>
<param name="chosenNodes" type="java.util.List"/>
<param name="excludedNodes" type="java.util.HashMap"/>
<param name="blocksize" type="long"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="chooseTarget" return="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="srcInode" type="org.apache.hadoop.hdfs.server.namenode.FSInodeInfo"/>
<param name="numOfReplicas" type="int"/>
<param name="writer" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"/>
<param name="chosenNodes" type="java.util.List"/>
<param name="blocksize" type="long"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="verifyBlockPlacement" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="srcPath" type="java.lang.String"/>
<param name="lBlk" type="org.apache.hadoop.hdfs.protocol.LocatedBlock"/>
<param name="minRacks" type="int"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="chooseReplicaToDelete" return="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="inode" type="org.apache.hadoop.hdfs.server.namenode.FSInodeInfo"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="replicationFactor" type="short"/>
<param name="first" type="java.util.Collection"/>
<param name="second" type="java.util.Collection"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[The class is responsible for choosing the desired number of targets
for placing block replicas.
The replica placement strategy is that if the writer is on a datanode,
the 1st replica is placed on the local machine,
otherwise a random datanode. The 2nd replica is placed on a datanode
that is on a different rack. The 3rd replica is placed on a datanode
which is on a different node of the rack as the second replica.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.BlockPlacementPolicyDefault -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.CancelDelegationTokenServlet -->
<class name="CancelDelegationTokenServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="CancelDelegationTokenServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="req" type="javax.servlet.http.HttpServletRequest"/>
<param name="resp" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="PATH_SPEC" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="TOKEN" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Cancel delegation tokens over http for use in hftp.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.CancelDelegationTokenServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.CheckpointSignature -->
<class name="CheckpointSignature" extends="org.apache.hadoop.hdfs.server.common.StorageInfo"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.WritableComparable"/>
<constructor name="CheckpointSignature"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="compareTo" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"/>
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[A unique signature intended to identify checkpoint transactions.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.CheckpointSignature -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.ContentSummaryServlet -->
<class name="ContentSummaryServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="ContentSummaryServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[Servlets for file checksum]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.ContentSummaryServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.CorruptReplicasMap -->
<class name="CorruptReplicasMap" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="CorruptReplicasMap"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="addToCorruptReplicasMap"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="dn" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"/>
<doc>
<![CDATA[Mark the block belonging to datanode as corrupt.
@param blk Block to be added to CorruptReplicasMap
@param dn DatanodeDescriptor which holds the corrupt replica]]>
</doc>
</method>
<method name="numCorruptReplicas" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
</method>
<method name="size" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[Stores information about all corrupt blocks in the File System.
A Block is considered corrupt only if all of its replicas are
corrupt. While reporting replicas of a Block, we hide any corrupt
copies. These copies are removed once Block is found to have
expected number of good replicas.
Mapping: Block -> TreeSet<DatanodeDescriptor>]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.CorruptReplicasMap -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor -->
<class name="DatanodeDescriptor" extends="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DatanodeDescriptor"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Default constructor]]>
</doc>
</constructor>
<constructor name="DatanodeDescriptor" type="org.apache.hadoop.hdfs.protocol.DatanodeID"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[DatanodeDescriptor constructor
@param nodeID id of the data node]]>
</doc>
</constructor>
<constructor name="DatanodeDescriptor" type="org.apache.hadoop.hdfs.protocol.DatanodeID, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[DatanodeDescriptor constructor
@param nodeID id of the data node
@param networkLocation location of the data node in network]]>
</doc>
</constructor>
<constructor name="DatanodeDescriptor" type="org.apache.hadoop.hdfs.protocol.DatanodeID, java.lang.String, java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[DatanodeDescriptor constructor
@param nodeID id of the data node
@param networkLocation location of the data node in network
@param hostName it could be different from host specified for DatanodeID]]>
</doc>
</constructor>
<constructor name="DatanodeDescriptor" type="org.apache.hadoop.hdfs.protocol.DatanodeID, long, long, long, int, int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[DatanodeDescriptor constructor
@param nodeID id of the data node
@param capacity capacity of the data node
@param dfsUsed space used by the data node
@param remaining remaing capacity of the data node
@param xceiverCount # of data transfers at the data node]]>
</doc>
</constructor>
<constructor name="DatanodeDescriptor" type="org.apache.hadoop.hdfs.protocol.DatanodeID, java.lang.String, java.lang.String, long, long, long, int, int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[DatanodeDescriptor constructor
@param nodeID id of the data node
@param networkLocation location of the data node in network
@param capacity capacity of the data node, including space used by non-dfs
@param dfsUsed the used space by dfs datanode
@param remaining remaining capacity of the data node
@param xceiverCount # of data transfers at the data node]]>
</doc>
</constructor>
<method name="numBlocks" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getBlocksScheduled" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return Approximate number of blocks currently scheduled to be written
to this datanode.]]>
</doc>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="obj" type="java.lang.Object"/>
</method>
<method name="getVolumeFailures" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return number of failed volumes in the datanode.]]>
</doc>
</method>
<method name="updateRegInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<doc>
<![CDATA[@param nodeReg DatanodeID to update registration for.]]>
</doc>
</method>
<field name="isAlive" type="boolean"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="needKeyUpdate" type="boolean"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[DatanodeDescriptor tracks stats on a given DataNode, such as
available storage capacity, last update time, etc., and maintains a
set of blocks stored on the datanode.
This data structure is internal to the namenode. It is *not* sent
over-the-wire to the Client or the Datanodes. Neither is it stored
persistently in the fsImage.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor.BlockTargetPair -->
<class name="DatanodeDescriptor.BlockTargetPair" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<field name="block" type="org.apache.hadoop.hdfs.protocol.Block"
transient="false" volatile="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="targets" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor[]"
transient="false" volatile="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Block and targets pair]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor.BlockTargetPair -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets -->
<class name="FileChecksumServlets" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FileChecksumServlets"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[Servlets for file checksum]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets.GetServlet -->
<class name="FileChecksumServlets.GetServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FileChecksumServlets.GetServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[Get FileChecksum]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets.GetServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets.RedirectServlet -->
<class name="FileChecksumServlets.RedirectServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FileChecksumServlets.RedirectServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<doc>
<![CDATA[Redirect file checksum queries to an appropriate datanode.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FileChecksumServlets.RedirectServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FileDataServlet -->
<class name="FileDataServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FileDataServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="createUri" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="parent" type="java.lang.String"/>
<param name="i" type="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"/>
<param name="ugi" type="org.apache.hadoop.security.UserGroupInformation"/>
<param name="nnproxy" type="org.apache.hadoop.hdfs.protocol.ClientProtocol"/>
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="dt" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="URISyntaxException" type="java.net.URISyntaxException"/>
<doc>
<![CDATA[Create a redirection URI]]>
</doc>
</method>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Service a GET request as described below.
Request:
{@code
GET http://<nn>:<port>/data[/<path>] HTTP/1.1
}]]>
</doc>
</method>
<doc>
<![CDATA[Redirect queries about the hosted filesystem to an appropriate datanode.
@see org.apache.hadoop.hdfs.HftpFileSystem]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FileDataServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FsckServlet -->
<class name="FsckServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FsckServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Handle fsck request]]>
</doc>
</method>
<doc>
<![CDATA[This class is used in Namesystem's web server to do fsck on namenode.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FsckServlet -->
<!-- start interface org.apache.hadoop.hdfs.server.namenode.FSClusterStats -->
<interface name="FSClusterStats" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getTotalLoad" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[an indication of the total load of the cluster.
@return a count of the total number of block transfers and block
writes that are currently occuring on the cluster.]]>
</doc>
</method>
<doc>
<![CDATA[This interface is used for retrieving the load related statistics of
the cluster.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.namenode.FSClusterStats -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FSEditLog -->
<class name="FSEditLog" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="logSync"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Sync all modifications done by this thread.
The internal concurrency design of this class is as follows:
- Log items are written synchronized into an in-memory buffer,
and each assigned a transaction ID.
- When a thread (client) would like to sync all of its edits, logSync()
uses a ThreadLocal transaction ID to determine what edit number must
be synced to.
- The isSyncRunning volatile boolean tracks whether a sync is currently
under progress.
The data is double-buffered within each edit log implementation so that
in-memory writing can occur in parallel with the on-disk writing.
Each sync occurs in three steps:
1. synchronized, it swaps the double buffer and sets the isSyncRunning
flag.
2. unsynchronized, it flushes the data to storage
3. synchronized, it resets the flag and notifies anyone waiting on the
sync.
The lack of synchronization on step 2 allows other threads to continue
to write into the memory buffer while the sync is in progress.
Because this step is unsynchronized, actions that need to avoid
concurrency with sync() should be synchronized and also call
waitForSyncToFinish() before assuming they are running alone.]]>
</doc>
</method>
<method name="logOpenFile"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="newNode" type="org.apache.hadoop.hdfs.server.namenode.INodeFileUnderConstruction"/>
<doc>
<![CDATA[Add open lease record to edit log.
Records the block locations of the last block.]]>
</doc>
</method>
<method name="logCloseFile"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="newNode" type="org.apache.hadoop.hdfs.server.namenode.INodeFile"/>
<doc>
<![CDATA[Add close lease record to edit log.]]>
</doc>
</method>
<method name="logMkDir"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="newNode" type="org.apache.hadoop.hdfs.server.namenode.INode"/>
<doc>
<![CDATA[Add create directory record to edit log]]>
</doc>
</method>
<method name="setBufferCapacity"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="size" type="int"/>
</method>
<method name="getOutputStreamIterator" return="java.util.Iterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="streamType" type="org.apache.hadoop.hdfs.server.namenode.JournalStream.JournalType"/>
<doc>
<![CDATA[Get stream iterator for the specified type.]]>
</doc>
</method>
<doc>
<![CDATA[FSEditLog maintains a log of the namespace modifications.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FSEditLog -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader -->
<class name="FSEditLogLoader" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FSEditLogLoader" type="org.apache.hadoop.hdfs.server.namenode.FSNamesystem"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FSEditLogLoader -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FSImage -->
<class name="FSImage" extends="org.apache.hadoop.hdfs.server.common.Storage"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="FSImage" type="org.apache.hadoop.hdfs.server.common.StorageInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getFSNamesystem" return="org.apache.hadoop.hdfs.server.namenode.FSNamesystem"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</method>
<method name="setRestoreFailedStorage"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="val" type="boolean"/>
</method>
<method name="getRestoreFailedStorage" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="props" type="java.util.Properties"/>
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="props" type="java.util.Properties"/>
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Write last checkpoint time and version file into the storage directory.
The version file should always be written last.
Missing or corrupted version file indicates that
the checkpoint is not valid.
@param sd storage directory
@throws IOException]]>
</doc>
</method>
<method name="getEditLog" return="org.apache.hadoop.hdfs.server.namenode.FSEditLog"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isPreUpgradableLayout" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setImageDigest"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="digest" type="org.apache.hadoop.io.MD5Hash"/>
</method>
<method name="saveCurrent"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Save current image and empty journal into {@code current} directory.]]>
</doc>
</method>
<method name="moveCurrent"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Move {@code current} to {@code lastcheckpoint.tmp} and
recreate empty {@code current}.
{@code current} is moved only if it is well formatted,
that is contains VERSION file.
@see org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#getLastCheckpointTmp()
@see org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#getPreviousCheckpoint()]]>
</doc>
</method>
<method name="moveLastCheckpoint"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="sd" type="org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Move {@code lastcheckpoint.tmp} to {@code previous.checkpoint}
@see org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#getPreviousCheckpoint()
@see org.apache.hadoop.hdfs.server.common.Storage.StorageDirectory#getLastCheckpointTmp()]]>
</doc>
</method>
<method name="format"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getFsEditName" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="namesystem" type="org.apache.hadoop.hdfs.server.namenode.FSNamesystem"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="checkpointTime" type="long"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="editLog" type="org.apache.hadoop.hdfs.server.namenode.FSEditLog"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="imageDigest" type="org.apache.hadoop.io.MD5Hash"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="newImageDigest" type="org.apache.hadoop.io.MD5Hash"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="removedStorageDirs" type="java.util.List"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[list of failed (and thus removed) storages]]>
</doc>
</field>
<field name="ckptState" type="org.apache.hadoop.hdfs.server.namenode.FSImage.CheckpointStates"
transient="false" volatile="true"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[Can fs-image be rolled?]]>
</doc>
</field>
<doc>
<![CDATA[FSImage handles checkpointing and logging of the namespace edits.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FSImage -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FSImageSerialization -->
<class name="FSImageSerialization" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="readString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readBytes" return="byte[]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readPathComponents" return="byte[][]"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInputStream"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Reading the path from the image and converting it to byte[][] directly
this saves us an array copy and conversions to and from String
@param in
@return the array each element of which is a byte[] representation
of a path component
@throws IOException]]>
</doc>
</method>
<doc>
<![CDATA[Static utility functions for serializing various pieces of data in the correct
format for the FSImage file.
Some members are currently public for the benefit of the Offline Image Viewer
which is located outside of this package. These members should be made
package-protected when the OIV is refactored.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FSImageSerialization -->
<!-- start interface org.apache.hadoop.hdfs.server.namenode.FSInodeInfo -->
<interface name="FSInodeInfo" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getFullPathName" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[a string representation of an inode
@return the full pathname (from root) that this inode represents]]>
</doc>
</method>
<doc>
<![CDATA[This interface is used used the pluggable block placement policy
to expose a few characteristics of an Inode.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.namenode.FSInodeInfo -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.FSNamesystem -->
<class name="FSNamesystem" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.protocol.FSConstants"/>
<implements name="org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMBean"/>
<implements name="org.apache.hadoop.hdfs.server.namenode.FSClusterStats"/>
<implements name="org.apache.hadoop.hdfs.server.namenode.NameNodeMXBean"/>
<method name="getNamespaceDirs" return="java.util.Collection"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="getStorageDirs" return="java.util.Collection"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="propertyName" type="java.lang.String"/>
</method>
<method name="getNamespaceEditsDirs" return="java.util.Collection"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="getUpgradePermission" return="org.apache.hadoop.fs.permission.PermissionStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[Return the default path permission when upgrading from releases with no
permissions (<=0.15) to releases with permissions (>=0.16)]]>
</doc>
</method>
<method name="close"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Close down this file system manager.
Causes heartbeat and lease daemons to stop; waits briefly for
them to finish, but a short timeout returns control back to caller.]]>
</doc>
</method>
<method name="setPermission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permission" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set permissions for an existing file.
@throws IOException]]>
</doc>
</method>
<method name="setOwner"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="username" type="java.lang.String"/>
<param name="group" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Set owner for an existing file.
@throws IOException]]>
</doc>
</method>
<method name="concat"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="java.lang.String"/>
<param name="srcs" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Moves all the blocks from srcs and appends them to trg
To avoid rollbacks we will verify validitity of ALL of the args
before we start actual move.
@param target
@param srcs
@throws IOException]]>
</doc>
</method>
<method name="setTimes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="mtime" type="long"/>
<param name="atime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[stores the modification and access time for this inode.
The access time is precise upto an hour. The transaction, if needed, is
written to the edits log but is not flushed.]]>
</doc>
</method>
<method name="createSymlink"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="java.lang.String"/>
<param name="link" type="java.lang.String"/>
<param name="dirPerms" type="org.apache.hadoop.fs.permission.PermissionStatus"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Create a symbolic link.]]>
</doc>
</method>
<method name="setReplication" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="replication" type="short"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Set replication for an existing file.
The NameNode sets new replication and schedules either replication of
under-replicated data blocks or removal of the excessive block copies
if the blocks are over-replicated.
@see ClientProtocol#setReplication(String, short)
@param src file name
@param replication new replication
@return true if successful;
false if file does not exist or is a directory]]>
</doc>
</method>
<method name="getAdditionalBlock" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<param name="previous" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="excludedNodes" type="java.util.HashMap"/>
<exception name="LeaseExpiredException" type="org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException"/>
<exception name="NotReplicatedYetException" type="org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException"/>
<exception name="QuotaExceededException" type="org.apache.hadoop.hdfs.protocol.QuotaExceededException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client would like to obtain an additional block for the indicated
filename (which is being written-to). Return an array that consists
of the block, plus a set of machines. The first on this list should
be where the client writes data. Subsequent items in the list must
be provided in the connection to the first datanode.
Make sure the previous blocks have been reported by datanodes and
are replicated. Will return an empty 2-elt array if we want the
client to "try again later".]]>
</doc>
</method>
<method name="abandonBlock" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="src" type="java.lang.String"/>
<param name="holder" type="java.lang.String"/>
<exception name="LeaseExpiredException" type="org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException"/>
<exception name="FileNotFoundException" type="java.io.FileNotFoundException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client would like to let go of the given block]]>
</doc>
</method>
<method name="completeFile" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="holder" type="java.lang.String"/>
<param name="last" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Complete in-progress write to the given file.
@return true if successful, false if the client should continue to retry
(e.g if not all blocks have reached minimum replication yet)
@throws IOException on error (eg lease mismatch, file not open, file deleted)]]>
</doc>
</method>
<method name="markBlockAsCorrupt"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="dn" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Mark the block belonging to datanode as corrupt
@param blk Block to be marked as corrupt
@param dn Datanode which holds the corrupt replica]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="recursive" type="boolean"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="SafeModeException" type="org.apache.hadoop.hdfs.server.namenode.SafeModeException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Remove the indicated file from namespace.
@see ClientProtocol#delete(String, boolean) for detailed descriptoin and
description of exceptions]]>
</doc>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permissions" type="org.apache.hadoop.fs.permission.PermissionStatus"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<doc>
<![CDATA[Create all the necessary directories]]>
</doc>
</method>
<method name="getListing" return="org.apache.hadoop.hdfs.protocol.DirectoryListing"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="startAfter" type="byte[]"/>
<param name="needLocation" type="boolean"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="UnresolvedLinkException" type="org.apache.hadoop.fs.UnresolvedLinkException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a partial listing of the indicated directory
@param src the directory name
@param startAfter the name to start after
@param needLocation if blockLocations need to be returned
@return a partial listing starting after startAfter
@throws AccessControlException if access is denied
@throws UnresolvedLinkException if symbolic link is encountered
@throws IOException if other I/O error occurred]]>
</doc>
</method>
<method name="registerDatanode"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Register Datanode.
<p>
The purpose of registration is to identify whether the new datanode
serves a new data storage, and will report new data block copies,
which the namenode was not aware of; or the datanode is a replacement
node for the data storage that was previously served by a different
or the same (in terms of host:port) datanode.
The data storages are distinguished by their storageIDs. When a new
data storage is reported the namenode issues a new unique storageID.
<p>
Finally, the namenode returns its namespaceID as the registrationID
for the datanodes.
namespaceID is a persistent attribute of the name space.
The registrationID is checked every time the datanode is communicating
with the namenode.
Datanodes with inappropriate registrationID are rejected.
If the namenode stops, and then restarts it can restore its
namespaceID and will continue serving the datanodes that has previously
registered with the namenode without restarting the whole cluster.
@see org.apache.hadoop.hdfs.server.datanode.DataNode#register()]]>
</doc>
</method>
<method name="getRegistrationID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get registrationID for datanodes based on the namespaceID.
@see #registerDatanode(DatanodeRegistration)
@see FSImage#newNamespaceID()
@return registration ID]]>
</doc>
</method>
<method name="computeDatanodeWork" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Compute block replication and block invalidation work
that can be scheduled on data-nodes.
The datanode will be informed of this work at the next heartbeat.
@return number of blocks scheduled for replication or removal.
@throws IOException]]>
</doc>
</method>
<method name="setNodeReplicationLimit"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="limit" type="int"/>
</method>
<method name="removeDatanode"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeID" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Remove a datanode descriptor.
@param nodeID datanode ID.
@throws IOException]]>
</doc>
</method>
<method name="processReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeID" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<param name="newReport" type="org.apache.hadoop.hdfs.protocol.BlockListAsLongs"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The given node is reporting all its blocks. Use this info to
update the (machine-->blocklist) and (block-->machinelist) tables.]]>
</doc>
</method>
<method name="blockReceived"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeID" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="delHint" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The given node is reporting that it received a certain block.]]>
</doc>
</method>
<method name="getMissingBlocksCount" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getCapacityTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total raw bytes including non-dfs used space.]]>
</doc>
</method>
<method name="getCapacityUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total used space by data nodes]]>
</doc>
</method>
<method name="getCapacityUsedPercent" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total used space by data nodes as percentage of total capacity]]>
</doc>
</method>
<method name="getCapacityUsedNonDFS" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total used space by data nodes for non DFS purposes such
as storing temporary files on the local file system]]>
</doc>
</method>
<method name="getCapacityRemaining" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total non-used raw bytes.]]>
</doc>
</method>
<method name="getCapacityRemainingPercent" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total remaining space by data nodes as percentage of total capacity]]>
</doc>
</method>
<method name="getTotalLoad" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total number of connections.]]>
</doc>
</method>
<method name="datanodeReport" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="type" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
</method>
<method name="DFSNodesStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="live" type="java.util.ArrayList"/>
<param name="dead" type="java.util.ArrayList"/>
</method>
<method name="stopDecommission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="node" type="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Stop decommissioning the specified datanodes.]]>
</doc>
</method>
<method name="getDataNodeInfo" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="getStartTime" return="java.util.Date"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="refreshNodes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Rereads the config to get hosts and exclude list file names.
Rereads the files to update the hosts and exclude lists. It
checks if any of the hosts have changed states:
1. Added to hosts --> no further work needed here.
2. Removed from hosts --> mark AdminState as decommissioned.
3. Added to exclude --> start decommission.
4. Removed from exclude --> stop decommission.]]>
</doc>
</method>
<method name="getDatanode" return="org.apache.hadoop.hdfs.server.namenode.DatanodeDescriptor"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeID" type="org.apache.hadoop.hdfs.protocol.DatanodeID"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get data node by storage ID.
@param nodeID
@return DatanodeDescriptor or null if the node is not found.
@throws IOException]]>
</doc>
</method>
<method name="getBlocksTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the total number of blocks in the system.]]>
</doc>
</method>
<method name="getFilesTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getPendingReplicationBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getUnderReplicatedBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getCorruptReplicaBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns number of blocks with corrupt replicas]]>
</doc>
</method>
<method name="getScheduledReplicationBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getPendingDeletionBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getExcessBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getBlockCapacity" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getFSState" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getFSNamesystemMetrics" return="org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMetrics"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[get FSNamesystemMetrics]]>
</doc>
</method>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[shutdown FSNamesystem]]>
</doc>
</method>
<method name="getNumLiveDataNodes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Number of live data nodes
@return Number of live data nodes]]>
</doc>
</method>
<method name="getNumDeadDataNodes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Number of dead data nodes
@return Number of dead data nodes]]>
</doc>
</method>
<method name="setGenerationStamp"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="stamp" type="long"/>
<doc>
<![CDATA[Sets the generation stamp for this filesystem]]>
</doc>
</method>
<method name="getGenerationStamp" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the generation stamp for this filesystem]]>
</doc>
</method>
<method name="numCorruptReplicas" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blk" type="org.apache.hadoop.hdfs.protocol.Block"/>
</method>
<method name="getDecommissioningNodes" return="java.util.ArrayList"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDelegationTokenSecretManager" return="org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenSecretManager"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the DelegationTokenSecretManager instance in the namesystem.
@return delegation token secret manager object]]>
</doc>
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="renewer" type="org.apache.hadoop.io.Text"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@param renewer
@return Token<DelegationTokenIdentifier>
@throws IOException]]>
</doc>
</method>
<method name="renewDelegationToken" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@param token
@return New expiryTime of the token
@throws InvalidToken
@throws IOException]]>
</doc>
</method>
<method name="cancelDelegationToken"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@param token
@throws IOException]]>
</doc>
</method>
<method name="logUpdateMasterKey"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="org.apache.hadoop.security.token.delegation.DelegationKey"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Log the updateMasterKey operation to edit logs
@param key new delegation key.]]>
</doc>
</method>
<method name="getVersion" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Class representing Namenode information for JMX interfaces]]>
</doc>
</method>
<method name="getUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getFree" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getSafemode" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isUpgradeFinalized" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getNonDfsUsedSpace" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getPercentUsed" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getPercentRemaining" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getTotalBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getTotalFiles" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getThreads" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getLiveNodes" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returned information is a JSON representation of map with host name as the
key and value is a map of live node attribute keys to its values]]>
</doc>
</method>
<method name="getDeadNodes" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returned information is a JSON representation of map with host name as the
key and value is a map of dead node attribute keys to its values]]>
</doc>
</method>
<method name="getDecomNodes" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returned information is a JSON representation of map with host name as the
key and value is a map of decomisioning node attribute keys to its values]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="auditLog" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Logger for audit events, noting successful FSNamesystem operations. Emits
to FSNamesystem.audit at INFO. Each event causes a set of tab-separated
<code>key=value</code> pairs to be written for the following properties:
<code>
ugi=&lt;ugi in RPC&gt;
ip=&lt;remote IP&gt;
cmd=&lt;command&gt;
src=&lt;src path&gt;
dst=&lt;dst path (optional)&gt;
perm=&lt;permissions (optional)&gt;
</code>]]>
</doc>
</field>
<field name="dir" type="org.apache.hadoop.hdfs.server.namenode.FSDirectory"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="leaseManager" type="org.apache.hadoop.hdfs.server.namenode.LeaseManager"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="lmthread" type="org.apache.hadoop.util.Daemon"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="replthread" type="org.apache.hadoop.util.Daemon"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[FSNamesystem does the actual bookkeeping work for the
DataNode.
It tracks several important tables.
1) valid fsname --> blocklist (kept on disk, logged)
2) Set of all valid blocks (inverted #1)
3) block --> machinelist (kept in memory, rebuilt dynamically from reports)
4) machine --> blocklist (inverted #2)
5) LRU cache of updated-heartbeat machines]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.FSNamesystem -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.GetDelegationTokenServlet -->
<class name="GetDelegationTokenServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="GetDelegationTokenServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="req" type="javax.servlet.http.HttpServletRequest"/>
<param name="resp" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="PATH_SPEC" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="RENEWER" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Serve delegation tokens over http for use in hftp.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.GetDelegationTokenServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.GetImageServlet -->
<class name="GetImageServlet" extends="javax.servlet.http.HttpServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="GetImageServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="isValidRequestor" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="remoteUser" type="java.lang.String"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[This class is used in Namesystem's jetty to retrieve a file.
Typically used by the Secondary NameNode to retrieve image and
edit file for periodic checkpointing.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.GetImageServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.INodeSymlink -->
<class name="INodeSymlink" extends="org.apache.hadoop.hdfs.server.namenode.INode"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="isLink" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getLinkValue" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getSymlink" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="isDirectory" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[An INode representing a symbolic link.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.INodeSymlink -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException -->
<class name="LeaseExpiredException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="LeaseExpiredException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[The lease that was being used to create this file has expired.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.LeaseManager -->
<class name="LeaseManager" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getLeaseByPath" return="org.apache.hadoop.hdfs.server.namenode.LeaseManager.Lease"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<doc>
<![CDATA[@return the lease containing src]]>
</doc>
</method>
<method name="countLease" return="int"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return the number of leases currently in the system]]>
</doc>
</method>
<method name="setLeasePeriod"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="softLimit" type="long"/>
<param name="hardLimit" type="long"/>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[LeaseManager does the lease housekeeping for writing on files.
This class also provides useful static methods for lease recovery.
Lease Recovery Algorithm
1) Namenode retrieves lease information
2) For each file f in the lease, consider the last block b of f
2.1) Get the datanodes which contains b
2.2) Assign one of the datanodes as the primary datanode p
2.3) p obtains a new generation stamp form the namenode
2.4) p get the block info from each datanode
2.5) p computes the minimum block length
2.6) p updates the datanodes, which have a valid generation stamp,
with the new generation stamp and the minimum block length
2.7) p acknowledges the namenode the update results
2.8) Namenode updates the BlockInfo
2.9) Namenode removes f from the lease
and removes the lease once all files have been removed
2.10) Namenode commit changes to edit log]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.LeaseManager -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.ListPathsServlet -->
<class name="ListPathsServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="ListPathsServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="buildRoot" return="java.util.Map"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="doc" type="org.znerd.xmlenc.XMLOutputter"/>
<doc>
<![CDATA[Build a map from the query string, setting values and defaults.]]>
</doc>
</method>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Service a GET request as described below.
Request:
{@code
GET http://<nn>:<port>/listPaths[/<path>][<?option>[&option]*] HTTP/1.1
}
Where <i>option</i> (default) in:
recursive (&quot;no&quot;)
filter (&quot;.*&quot;)
exclude (&quot;\..*\.crc&quot;)
Response: A flat list of files/directories in the following format:
{@code
<listing path="..." recursive="(yes|no)" filter="..."
time="yyyy-MM-dd hh:mm:ss UTC" version="...">
<directory path="..." modified="yyyy-MM-dd hh:mm:ss"/>
<file path="..." modified="yyyy-MM-dd'T'hh:mm:ssZ" accesstime="yyyy-MM-dd'T'hh:mm:ssZ"
blocksize="..."
replication="..." size="..."/>
</listing>
}]]>
</doc>
</method>
<field name="df" type="java.lang.ThreadLocal"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Obtain meta-information about a filesystem.
@see org.apache.hadoop.hdfs.HftpFileSystem]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.ListPathsServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.NameNode -->
<class name="NameNode" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols"/>
<implements name="org.apache.hadoop.hdfs.protocol.FSConstants"/>
<constructor name="NameNode" type="org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Start NameNode.
<p>
The name-node can be started with one of the following startup options:
<ul>
<li>{@link StartupOption#REGULAR REGULAR} - normal name node startup</li>
<li>{@link StartupOption#FORMAT FORMAT} - format name node</li>
<li>{@link StartupOption#BACKUP BACKUP} - start backup node</li>
<li>{@link StartupOption#CHECKPOINT CHECKPOINT} - start checkpoint node</li>
<li>{@link StartupOption#UPGRADE UPGRADE} - start the cluster
upgrade and create a snapshot of the current file system state</li>
<li>{@link StartupOption#ROLLBACK ROLLBACK} - roll the
cluster back to the previous state</li>
<li>{@link StartupOption#FINALIZE FINALIZE} - finalize
previous upgrade</li>
<li>{@link StartupOption#IMPORT IMPORT} - import checkpoint</li>
</ul>
The option is passed via configuration field:
<tt>dfs.namenode.startup</tt>
The conf will be modified to reflect the actual ports on which
the NameNode is up and running if the user passes the port as
<code>zero</code> in the conf.
@param conf confirguration
@throws IOException]]>
</doc>
</constructor>
<constructor name="NameNode" type="org.apache.hadoop.conf.Configuration, org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</constructor>
<method name="getProtocolVersion" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="protocol" type="java.lang.String"/>
<param name="clientVersion" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="format"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Format a new filesystem. Destroys any filesystem that may already
exist at this location.]]>
</doc>
</method>
<method name="getNameNodeMetrics" return="org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="address" type="java.lang.String"/>
</method>
<method name="setServiceAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="address" type="java.lang.String"/>
<doc>
<![CDATA[Set the configuration property for the service rpc address
to address]]>
</doc>
</method>
<method name="getServiceAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<param name="fallback" type="boolean"/>
<doc>
<![CDATA[Fetches the address for services to use when connecting to namenode
based on the value of fallback returns null if the special
address is not specified or returns the default namenode address
to be used by both clients and services.
Services here are datanodes, backup node, any non client connection]]>
</doc>
</method>
<method name="getAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="getUri" return="java.net.URI"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="namenode" type="java.net.InetSocketAddress"/>
</method>
<method name="getHostPortString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="addr" type="java.net.InetSocketAddress"/>
<doc>
<![CDATA[Compose a "host:port" string from the address.]]>
</doc>
</method>
<method name="getRole" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getServiceRpcServerAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Given a configuration get the address of the service rpc server
If the service rpc is not configured returns null]]>
</doc>
</method>
<method name="getRpcServerAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setRpcServiceServerAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<doc>
<![CDATA[Modifies the configuration passed to contain the service rpc address setting]]>
</doc>
</method>
<method name="setRpcServerAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="getHttpServerAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="setHttpServerAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="loadNamesystem"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="initialize"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Initialize name-node.
@param conf the configuration]]>
</doc>
</method>
<method name="getInfoServer" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="join"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Wait for service to finish.
(Normally, it runs forever.)]]>
</doc>
</method>
<method name="stop"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Stop all NameNode threads and wait for all to finish.]]>
</doc>
</method>
<method name="getBlocks" return="org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="datanode" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="size" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getBlockKeys" return="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="errorReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="errorCode" type="int"/>
<param name="msg" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="register" return="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="startCheckpoint" return="org.apache.hadoop.hdfs.server.protocol.NamenodeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="endCheckpoint"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="sig" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="journalSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="journal"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="jAction" type="int"/>
<param name="length" type="int"/>
<param name="args" type="byte[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getDelegationToken" return="org.apache.hadoop.security.token.Token"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="renewer" type="org.apache.hadoop.io.Text"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="renewDelegationToken" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="SecretManager.InvalidToken" type="org.apache.hadoop.security.token.SecretManager.InvalidToken"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="cancelDelegationToken"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="token" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getBlockLocations" return="org.apache.hadoop.hdfs.protocol.LocatedBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="offset" type="long"/>
<param name="length" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getServerDefaults" return="org.apache.hadoop.fs.FsServerDefaults"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="create"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="masked" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="clientName" type="java.lang.String"/>
<param name="flag" type="org.apache.hadoop.io.EnumSetWritable"/>
<param name="createParent" type="boolean"/>
<param name="replication" type="short"/>
<param name="blockSize" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="append" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="recoverLease" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setReplication" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="replication" type="short"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setPermission"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="permissions" type="org.apache.hadoop.fs.permission.FsPermission"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setOwner"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="username" type="java.lang.String"/>
<param name="groupname" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="addBlock" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<param name="previous" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="excludedNodes" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="abandonBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="b" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="src" type="java.lang.String"/>
<param name="holder" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client needs to give up on the block.]]>
</doc>
</method>
<method name="complete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<param name="last" type="org.apache.hadoop.hdfs.protocol.Block"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="reportBadBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.LocatedBlock[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[The client has detected an error on the specified located blocks
and is reporting them to the server. For now, the namenode will
mark the block as corrupt. In the future we might
check the blocks are actually corrupt.]]>
</doc>
</method>
<method name="updateBlockForPipeline" return="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="updatePipeline"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="clientName" type="java.lang.String"/>
<param name="oldBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newNodes" type="org.apache.hadoop.hdfs.protocol.DatanodeID[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="commitBlockSynchronization"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newgenerationstamp" type="long"/>
<param name="newlength" type="long"/>
<param name="closeFile" type="boolean"/>
<param name="deleteblock" type="boolean"/>
<param name="newtargets" type="org.apache.hadoop.hdfs.protocol.DatanodeID[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getPreferredBlockSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="filename" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="rename" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="dst" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="concat"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="trg" type="java.lang.String"/>
<param name="src" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="rename"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="dst" type="java.lang.String"/>
<param name="options" type="org.apache.hadoop.fs.Options.Rename[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="delete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="recursive" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="mkdirs" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="masked" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="renewLease"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getListing" return="org.apache.hadoop.hdfs.protocol.DirectoryListing"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="startAfter" type="byte[]"/>
<param name="needLocation" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="getFileInfo" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the file info for a specific file.
@param src The string representation of the path to the file
@return object containing information regarding the file
or null if file not found]]>
</doc>
</method>
<method name="getFileLinkInfo" return="org.apache.hadoop.hdfs.protocol.HdfsFileStatus"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the file info for a specific file. If the path refers to a
symlink then the FileStatus of the symlink is returned.
@param src The string representation of the path to the file
@return object containing information regarding the file
or null if file not found]]>
</doc>
</method>
<method name="getStats" return="long[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@inheritDoc]]>
</doc>
</method>
<method name="getDatanodeReport" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="type" type="org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="setSafeMode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.SafeModeAction"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@inheritDoc]]>
</doc>
</method>
<method name="isInSafeMode" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Is the cluster currently in safe mode?]]>
</doc>
</method>
<method name="restoreFailedStorage" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="arg" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<doc>
<![CDATA[@throws AccessControlException
@inheritDoc]]>
</doc>
</method>
<method name="saveNamespace"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@inheritDoc]]>
</doc>
</method>
<method name="refreshNodes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Refresh the list of datanodes that the namenode should allow to
connect. Re-reads conf by creating new HdfsConfiguration object and
uses the files list in the configuration to update the list.]]>
</doc>
</method>
<method name="getEditLogSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the size of the current edit log.]]>
</doc>
</method>
<method name="rollEditLog" return="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Roll the edit log.]]>
</doc>
</method>
<method name="rollFsImage"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="sig" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Roll the image]]>
</doc>
</method>
<method name="finalizeUpgrade"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="distributedUpgradeProgress" return="org.apache.hadoop.hdfs.server.common.UpgradeStatusReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="action" type="org.apache.hadoop.hdfs.protocol.FSConstants.UpgradeAction"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="metaSave"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="filename" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Dumps namenode state into specified file]]>
</doc>
</method>
<method name="listCorruptFileBlocks" return="java.util.Collection"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="startBlockAfter" type="java.lang.String"/>
<exception name="AccessControlException" type="org.apache.hadoop.security.AccessControlException"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@param path
Sub-tree used in querying corrupt files
@param startBlockAfter
Paging support---pass in the last block returned from the previous
call and some # of corrupt blocks after that point are returned
@return a list in which each entry describes a corrupt file/block
@throws AccessControlException
@throws IOException]]>
</doc>
</method>
<method name="getContentSummary" return="org.apache.hadoop.fs.ContentSummary"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setQuota"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<param name="namespaceQuota" type="long"/>
<param name="diskspaceQuota" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="fsync"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="clientName" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="setTimes"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="src" type="java.lang.String"/>
<param name="mtime" type="long"/>
<param name="atime" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@inheritDoc]]>
</doc>
</method>
<method name="createSymlink"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="target" type="java.lang.String"/>
<param name="link" type="java.lang.String"/>
<param name="dirPerms" type="org.apache.hadoop.fs.permission.FsPermission"/>
<param name="createParent" type="boolean"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@inheritDoc]]>
</doc>
</method>
<method name="getLinkTarget" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="path" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@inheritDoc]]>
</doc>
</method>
<method name="registerDatanode" return="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="sendHeartbeat" return="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="capacity" type="long"/>
<param name="dfsUsed" type="long"/>
<param name="remaining" type="long"/>
<param name="xmitsInProgress" type="int"/>
<param name="xceiverCount" type="int"/>
<param name="failedVolumes" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Data node notify the name node that it is alive
Return an array of block-oriented commands for the datanode to execute.
This will be either a transfer or a delete operation.]]>
</doc>
</method>
<method name="blockReport" return="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="blocks" type="long[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="blockReceived"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.Block[]"/>
<param name="delHints" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="errorReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="errorCode" type="int"/>
<param name="msg" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Handle an error report from a datanode.]]>
</doc>
</method>
<method name="versionRequest" return="org.apache.hadoop.hdfs.server.protocol.NamespaceInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="processUpgradeCommand" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="comm" type="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="verifyRequest"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="nodeReg" type="org.apache.hadoop.hdfs.server.protocol.NodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Verify request.
Verifies correctness of the datanode version, registration ID, and
if the datanode does not need to be shutdown.
@param nodeReg data node registration
@throws IOException]]>
</doc>
</method>
<method name="verifyVersion"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="version" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Verify version.
@param version
@throws IOException]]>
</doc>
</method>
<method name="getFsImageName" return="java.io.File"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the name of the fsImage file]]>
</doc>
</method>
<method name="getFSImage" return="org.apache.hadoop.hdfs.server.namenode.FSImage"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getFsImageNameCheckpoint" return="java.io.File[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Returns the name of the fsImage file uploaded by periodic
checkpointing]]>
</doc>
</method>
<method name="getNameNodeAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the address on which the NameNodes is listening to.
@return the address on which the NameNodes is listening to.]]>
</doc>
</method>
<method name="getHttpAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Returns the address of the NameNodes http server,
which is used to access the name-node web UI.
@return the http address.]]>
</doc>
</method>
<method name="refreshServiceAcl"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="refreshUserToGroupsMappings"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="refreshSuperUserGroupsConfiguration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="createNameNode" return="org.apache.hadoop.hdfs.server.namenode.NameNode"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
</method>
<field name="DEFAULT_PORT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="stateChangeLog" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="namesystem" type="org.apache.hadoop.hdfs.server.namenode.FSNamesystem"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="role" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</field>
<field name="serviceRpcServer" type="org.apache.hadoop.ipc.Server"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[RPC server for HDFS Services communication.
BackupNode, Datanodes and all other services
should be connecting to this server if it is
configured. Clients should only go to NameNode#server]]>
</doc>
</field>
<field name="rpcAddress" type="java.net.InetSocketAddress"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[RPC server address]]>
</doc>
</field>
<field name="serviceRPCAddress" type="java.net.InetSocketAddress"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[RPC server for DN address]]>
</doc>
</field>
<field name="httpServer" type="org.apache.hadoop.http.HttpServer"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[httpServer]]>
</doc>
</field>
<field name="httpAddress" type="java.net.InetSocketAddress"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[HTTP server address]]>
</doc>
</field>
<field name="stopRequested" type="boolean"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[only used for testing purposes]]>
</doc>
</field>
<field name="nodeRegistration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"
transient="false" volatile="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<doc>
<![CDATA[Registration information of this name-node]]>
</doc>
</field>
<doc>
<![CDATA[NameNode serves as both directory namespace manager and
"inode table" for the Hadoop DFS. There is a single NameNode
running in any DFS deployment. (Well, except when there
is a second backup/failover NameNode.)
The NameNode controls two critical tables:
1) filename->blocksequence (namespace)
2) block->machinelist ("inodes")
The first table is stored on disk and is very precious.
The second table is rebuilt every time the NameNode comes
up.
'NameNode' refers to both this class as well as the 'NameNode server'.
The 'FSNamesystem' class actually performs most of the filesystem
management. The majority of the 'NameNode' class itself is concerned
with exposing the IPC interface and the http server to the outside world,
plus some configuration management.
NameNode implements the ClientProtocol interface, which allows
clients to ask for DFS services. ClientProtocol is not
designed for direct use by authors of DFS client code. End-users
should instead use the org.apache.nutch.hadoop.fs.FileSystem class.
NameNode also implements the DatanodeProtocol interface, used by
DataNode programs that actually store DFS data blocks. These
methods are invoked repeatedly and automatically by all the
DataNodes in a DFS deployment.
NameNode also implements the NamenodeProtocol interface, used by
secondary namenodes or rebalancing processes to get partial namenode's
state, for example partial blocksMap etc.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.NameNode -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.NamenodeFsck -->
<class name="NamenodeFsck" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="fsck"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Check files on DFS, starting from the indicated path.]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="CORRUPT_STATUS" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="HEALTHY_STATUS" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="NONEXISTENT_STATUS" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FAILURE_STATUS" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FIXING_NONE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Don't attempt any fixing .]]>
</doc>
</field>
<field name="FIXING_MOVE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Move corrupted files to /lost+found .]]>
</doc>
</field>
<field name="FIXING_DELETE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Delete corrupted files.]]>
</doc>
</field>
<doc>
<![CDATA[This class provides rudimentary checking of DFS volumes for errors and
sub-optimal conditions.
<p>The tool scans all files and directories, starting from an indicated
root path. The following abnormal conditions are detected and handled:</p>
<ul>
<li>files with blocks that are completely missing from all datanodes.<br/>
In this case the tool can perform one of the following actions:
<ul>
<li>none ({@link #FIXING_NONE})</li>
<li>move corrupted files to /lost+found directory on DFS
({@link #FIXING_MOVE}). Remaining data blocks are saved as a
block chains, representing longest consecutive series of valid blocks.</li>
<li>delete corrupted files ({@link #FIXING_DELETE})</li>
</ul>
</li>
<li>detect files with under-replicated or over-replicated blocks</li>
</ul>
Additionally, the tool collects a detailed overall DFS statistics, and
optionally can print detailed statistics on block locations and replication
factors of each file.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.NamenodeFsck -->
<!-- start interface org.apache.hadoop.hdfs.server.namenode.NameNodeMXBean -->
<interface name="NameNodeMXBean" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getVersion" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the version of Hadoop.
@return the version]]>
</doc>
</method>
<method name="getUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the used space by data nodes.
@return the used space by data nodes]]>
</doc>
</method>
<method name="getFree" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets total non-used raw bytes.
@return total non-used raw bytes]]>
</doc>
</method>
<method name="getTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets total raw bytes including non-dfs used space.
@return the total raw bytes including non-dfs used space]]>
</doc>
</method>
<method name="getSafemode" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the safemode status
@return the safemode status]]>
</doc>
</method>
<method name="isUpgradeFinalized" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Checks if upgrade is finalized.
@return true, if upgrade is finalized]]>
</doc>
</method>
<method name="getNonDfsUsedSpace" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets total used space by data nodes for non DFS purposes such as storing
temporary files on the local file system
@return the non dfs space of the cluster]]>
</doc>
</method>
<method name="getPercentUsed" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the total used space by data nodes as percentage of total capacity
@return the percentage of used space on the cluster.]]>
</doc>
</method>
<method name="getPercentRemaining" return="float"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the total remaining space by data nodes as percentage of total
capacity
@return the percentage of the remaining space on the cluster]]>
</doc>
</method>
<method name="getTotalBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the total numbers of blocks on the cluster.
@return the total number of blocks of the cluster]]>
</doc>
</method>
<method name="getTotalFiles" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the total number of files on the cluster
@return the total number of files on the cluster]]>
</doc>
</method>
<method name="getThreads" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the number of threads.
@return the number of threads]]>
</doc>
</method>
<method name="getLiveNodes" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the live node information of the cluster.
@return the live node information]]>
</doc>
</method>
<method name="getDeadNodes" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the dead node information of the cluster.
@return the dead node information]]>
</doc>
</method>
<method name="getDecomNodes" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Gets the decommissioning node information of the cluster.
@return the decommissioning node information]]>
</doc>
</method>
<doc>
<![CDATA[This is the JMX management interface for namenode information]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.namenode.NameNodeMXBean -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException -->
<class name="NotReplicatedYetException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="NotReplicatedYetException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[The file has not finished being written to enough datanodes yet.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.NotReplicatedYetException -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.RenewDelegationTokenServlet -->
<class name="RenewDelegationTokenServlet" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="RenewDelegationTokenServlet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="req" type="javax.servlet.http.HttpServletRequest"/>
<param name="resp" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="PATH_SPEC" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="TOKEN" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Renew delegation tokens over http for use in hftp.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.RenewDelegationTokenServlet -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.SafeModeException -->
<class name="SafeModeException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="SafeModeException"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="SafeModeException" type="java.lang.String, org.apache.hadoop.hdfs.server.namenode.FSNamesystem.SafeModeInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[This exception is thrown when the name node is in safe mode.
Client cannot modified namespace until the safe mode is off.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.SafeModeException -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode -->
<class name="SecondaryNameNode" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.lang.Runnable"/>
<constructor name="SecondaryNameNode" type="org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Create a connection to the primary namenode.]]>
</doc>
</constructor>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="getHttpAddress" return="java.net.InetSocketAddress"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="conf" type="org.apache.hadoop.conf.Configuration"/>
</method>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Shut down this instance of the datanode.
Returns only after shutdown is complete.]]>
</doc>
</method>
<method name="run"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="doWork"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[main() has some simple utility methods.
@param argv Command line parameters.
@exception Exception if the filesystem does not exist.]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[The Secondary NameNode is a helper to the primary NameNode.
The Secondary is responsible for supporting periodic checkpoints
of the HDFS metadata. The current design allows only one Secondary
NameNode per HDFs cluster.
The Secondary NameNode is a daemon that periodically wakes
up (determined by the schedule specified in the configuration),
triggers a periodic checkpoint and then goes back to sleep.
The Secondary NameNode uses the ClientProtocol to talk to the
primary NameNode.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.StreamFile -->
<class name="StreamFile" extends="org.apache.hadoop.hdfs.server.namenode.DfsServlet"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="StreamFile"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getDFSClient" return="org.apache.hadoop.hdfs.DFSClient"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<exception name="IOException" type="java.io.IOException"/>
<exception name="InterruptedException" type="java.lang.InterruptedException"/>
<doc>
<![CDATA[getting a client for connecting to dfs]]>
</doc>
</method>
<method name="doGet"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="request" type="javax.servlet.http.HttpServletRequest"/>
<param name="response" type="javax.servlet.http.HttpServletResponse"/>
<exception name="ServletException" type="javax.servlet.ServletException"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="CONTENT_LENGTH" type="java.lang.String"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.StreamFile -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.UnsupportedActionException -->
<class name="UnsupportedActionException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="UnsupportedActionException" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[This exception is thrown when an operation is not supported.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.UnsupportedActionException -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.UpgradeObjectNamenode -->
<class name="UpgradeObjectNamenode" extends="org.apache.hadoop.hdfs.server.common.UpgradeObject"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="UpgradeObjectNamenode"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="processUpgradeCommand" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="true" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="command" type="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Process an upgrade command.
RPC has only one very generic command for all upgrade related inter
component communications.
The actual command recognition and execution should be handled here.
The reply is sent back also as an UpgradeCommand.
@param command
@return the reply command which is analyzed on the client side.]]>
</doc>
</method>
<method name="getType" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="startUpgrade" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="forceProceed"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Base class for name-node upgrade objects.
Data-node upgrades are run in separate threads.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.UpgradeObjectNamenode -->
</package>
<package name="org.apache.hadoop.hdfs.server.namenode.metrics">
<!-- start interface org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMBean -->
<interface name="FSNamesystemMBean" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getFSState" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[The state of the file system: Safemode or Operational
@return the state]]>
</doc>
</method>
<method name="getBlocksTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Number of allocated blocks in the system
@return - number of allocated blocks]]>
</doc>
</method>
<method name="getCapacityTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total storage capacity
@return - total capacity in bytes]]>
</doc>
</method>
<method name="getCapacityRemaining" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Free (unused) storage capacity
@return - free capacity in bytes]]>
</doc>
</method>
<method name="getCapacityUsed" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Used storage capacity
@return - used capacity in bytes]]>
</doc>
</method>
<method name="getFilesTotal" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total number of files and directories
@return - num of files and directories]]>
</doc>
</method>
<method name="getPendingReplicationBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Blocks pending to be replicated
@return - num of blocks to be replicated]]>
</doc>
</method>
<method name="getUnderReplicatedBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Blocks under replicated
@return - num of blocks under replicated]]>
</doc>
</method>
<method name="getScheduledReplicationBlocks" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Blocks scheduled for replication
@return - num of blocks scheduled for replication]]>
</doc>
</method>
<method name="getTotalLoad" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Total Load on the FSNamesystem
@return - total load of FSNamesystem]]>
</doc>
</method>
<method name="getNumLiveDataNodes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Number of Live data nodes
@return number of live data nodes]]>
</doc>
</method>
<method name="getNumDeadDataNodes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Number of dead data nodes
@return number of dead data nodes]]>
</doc>
</method>
<doc>
<![CDATA[This Interface defines the methods to get the status of a the FSNamesystem of
a name node.
It is also used for publishing via JMX (hence we follow the JMX naming
convention.)
Note we have not used the MetricsDynamicMBeanBase to implement this
because the interface for the NameNodeStateMBean is stable and should
be published as an interface.
<p>
Name Node runtime activity statistic info is report in another MBean
@see org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeActivityMBean]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMBean -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMetrics -->
<class name="FSNamesystemMetrics" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.metrics.Updater"/>
<constructor name="FSNamesystemMetrics" type="org.apache.hadoop.hdfs.server.namenode.FSNamesystem, org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="doUpdates"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="unused" type="org.apache.hadoop.metrics.MetricsContext"/>
<doc>
<![CDATA[Since this object is a registered updater, this method will be called
periodically, e.g. every 5 seconds.
We set the metrics value within this function before pushing it out.
FSNamesystem updates its own local variables which are
light weight compared to Metrics counters.
Some of the metrics are explicity casted to int. Few metrics collectors
do not handle long values. It is safe to cast to int for now as all these
values fit in int value.
Metrics related to DFS capacity are stored in bytes which do not fit in
int, so they are rounded to GB]]>
</doc>
</method>
<field name="numExpiredHeartbeats" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[This class is for maintaining the various FSNamesystem status metrics
and publishing them through the metrics interfaces.
The SNamesystem creates and registers the JMX MBean.
<p>
This class has a number of metrics variables that are publicly accessible;
these variables (objects) have methods to update their values;
for example:
<p> {@link #filesTotal}.set()]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.metrics.FSNamesystemMetrics -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeActivityMBean -->
<class name="NameNodeActivityMBean" extends="org.apache.hadoop.metrics.util.MetricsDynamicMBeanBase"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="NameNodeActivityMBean" type="org.apache.hadoop.metrics.util.MetricsRegistry"
static="false" final="false" visibility="protected"
deprecated="not deprecated">
</constructor>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[This is the JMX MBean for reporting the NameNode Activity.
The MBean is register using the name
"hadoop:service=NameNode,name=NameNodeActivity"
Many of the activity metrics are sampled and averaged on an interval
which can be specified in the metrics config file.
<p>
For the metrics that are sampled and averaged, one must specify
a metrics context that does periodic update calls. Most metrics contexts do.
The default Null metrics context however does NOT. So if you aren't
using any other metrics context then you can turn on the viewing and averaging
of sampled metrics by specifying the following two lines
in the hadoop-meterics.properties file:
<pre>
dfs.class=org.apache.hadoop.metrics.spi.NullContextWithUpdateThread
dfs.period=10
</pre>
<p>
Note that the metrics are collected regardless of the context used.
The context with the update thread is used to average the data periodically
Impl details: We use a dynamic mbean that gets the list of the metrics
from the metrics registry passed as an argument to the constructor]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeActivityMBean -->
<!-- start class org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics -->
<class name="NameNodeMetrics" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.metrics.Updater"/>
<constructor name="NameNodeMetrics" type="org.apache.hadoop.conf.Configuration, org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="shutdown"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="doUpdates"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="unused" type="org.apache.hadoop.metrics.MetricsContext"/>
<doc>
<![CDATA[Since this object is a registered updater, this method will be called
periodically, e.g. every 5 seconds.]]>
</doc>
</method>
<method name="resetAllMinMax"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="registry" type="org.apache.hadoop.metrics.util.MetricsRegistry"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numCreateFileOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numFilesCreated" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numFilesAppended" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numGetBlockLocations" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numFilesRenamed" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numGetListingOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numDeleteFileOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numFilesDeleted" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numFileInfoOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numAddBlockOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numcreateSymlinkOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numgetLinkTargetOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="transactions" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="syncs" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="transactionsBatchedInSync" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="blockReport" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingRate"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="safeModeTime" type="org.apache.hadoop.metrics.util.MetricsIntValue"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="fsImageLoadTime" type="org.apache.hadoop.metrics.util.MetricsIntValue"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numBlocksCorrupted" type="org.apache.hadoop.metrics.util.MetricsIntValue"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="numFilesInGetListingOps" type="org.apache.hadoop.metrics.util.MetricsTimeVaryingInt"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[This class is for maintaining the various NameNode activity statistics
and publishing them through the metrics interfaces.
This also registers the JMX MBean for RPC.
<p>
This class has a number of metrics variables that are publicly accessible;
these variables (objects) have methods to update their values;
for example:
<p> {@link #syncs}.inc()]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.namenode.metrics.NameNodeMetrics -->
</package>
<package name="org.apache.hadoop.hdfs.server.protocol">
<!-- start class org.apache.hadoop.hdfs.server.protocol.BlockCommand -->
<class name="BlockCommand" extends="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="BlockCommand" type="int, java.util.List"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create BlockCommand for transferring blocks to another datanode
@param blocktargetlist blocks to be transferred]]>
</doc>
</constructor>
<constructor name="BlockCommand" type="int, org.apache.hadoop.hdfs.protocol.Block[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create BlockCommand for the given action
@param blocks blocks related to the action]]>
</doc>
</constructor>
<method name="getBlocks" return="org.apache.hadoop.hdfs.protocol.Block[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getTargets" return="org.apache.hadoop.hdfs.protocol.DatanodeInfo[][]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[A BlockCommand is an instruction to a datanode
regarding some blocks under its control. It tells
the DataNode to either invalidate a set of indicated
blocks, or to copy a set of indicated blocks to
another DataNode.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.BlockCommand -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand -->
<class name="BlockRecoveryCommand" extends="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockRecoveryCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create empty BlockRecoveryCommand.]]>
</doc>
</constructor>
<constructor name="BlockRecoveryCommand" type="int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create BlockRecoveryCommand with
the specified capacity for recovering blocks.]]>
</doc>
</constructor>
<method name="getRecoveringBlocks" return="java.util.Collection"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return the list of recovering blocks.]]>
</doc>
</method>
<method name="add"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock"/>
<doc>
<![CDATA[Add recovering block to the command.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[BlockRecoveryCommand is an instruction to a data-node to recover
the specified blocks.
The data-node that receives this command treats itself as a primary
data-node in the recover process.
Block recovery is identified by a recoveryId, which is also the new
generation stamp, which the block will have after the recovery succeeds.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock -->
<class name="BlockRecoveryCommand.RecoveringBlock" extends="org.apache.hadoop.hdfs.protocol.LocatedBlock"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="BlockRecoveryCommand.RecoveringBlock"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create empty RecoveringBlock.]]>
</doc>
</constructor>
<constructor name="BlockRecoveryCommand.RecoveringBlock" type="org.apache.hadoop.hdfs.protocol.Block, org.apache.hadoop.hdfs.protocol.DatanodeInfo[], long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create RecoveringBlock.]]>
</doc>
</constructor>
<method name="getNewGenerationStamp" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Return the new generation stamp of the block,
which also plays role of the recovery id.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[This is a block with locations from which it should be recovered
and the new generation stamp, which the block will have after
successful recovery.
The new generation stamp of the block, also plays role of the recovery id.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations -->
<class name="BlocksWithLocations" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="BlocksWithLocations" type="org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations.BlockWithLocations[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor with one parameter]]>
</doc>
</constructor>
<method name="getBlocks" return="org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations.BlockWithLocations[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[getter]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[serialization method]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[deserialization method]]>
</doc>
</method>
<doc>
<![CDATA[A class to implement an array of BlockLocations
It provide efficient customized serialization/deserialization methods
in stead of using the default array (de)serialization provided by RPC]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations.BlockWithLocations -->
<class name="BlocksWithLocations.BlockWithLocations" extends="java.lang.Object"
abstract="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="BlocksWithLocations.BlockWithLocations"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[default constructor]]>
</doc>
</constructor>
<constructor name="BlocksWithLocations.BlockWithLocations" type="org.apache.hadoop.hdfs.protocol.Block, java.lang.String[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[constructor]]>
</doc>
</constructor>
<method name="getBlock" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[get the block]]>
</doc>
</method>
<method name="getDatanodes" return="java.lang.String[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[get the block's locations]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[deserialization method]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[serialization method]]>
</doc>
</method>
<doc>
<![CDATA[A class to keep track of a block and its locations]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations.BlockWithLocations -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.CheckpointCommand -->
<class name="CheckpointCommand" extends="org.apache.hadoop.hdfs.server.protocol.NamenodeCommand"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="CheckpointCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="CheckpointCommand" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature, boolean, boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getSignature" return="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Checkpoint signature is used to ensure
that nodes are talking about the same checkpoint.]]>
</doc>
</method>
<method name="isImageObsolete" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Indicates whether current backup image is obsolete, and therefore
need to be discarded?
@return true if current image should be discarded.]]>
</doc>
</method>
<method name="needToReturnImage" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Indicates whether the new checkpoint image needs to be transfered
back to the name-node after the checkpoint is done.
@return true if the checkpoint should be returned back.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Checkpoint command.
<p>
Returned to the backup node by the name-node as a reply to the
{@link NamenodeProtocol#startCheckpoint(NamenodeRegistration)}
request.<br>
Contains:
<ul>
<li>{@link CheckpointSignature} identifying the particular checkpoint</li>
<li>indicator whether the backup image should be discarded before starting
the checkpoint</li>
<li>indicator whether the image should be transfered back to the name-node
upon completion of the checkpoint.</li>
</ul>]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.CheckpointCommand -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.DatanodeCommand -->
<class name="DatanodeCommand" extends="org.apache.hadoop.hdfs.server.protocol.ServerCommand"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DatanodeCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<field name="REGISTER" type="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FINALIZE" type="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Base class for data-node command.
Issued by the name-node to notify data-nodes what should be done.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.DatanodeCommand -->
<!-- start interface org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol -->
<interface name="DatanodeProtocol" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.ipc.VersionedProtocol"/>
<method name="registerDatanode" return="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Register Datanode.
@see org.apache.hadoop.hdfs.server.datanode.DataNode#dnRegistration
@see org.apache.hadoop.hdfs.server.namenode.FSNamesystem#registerDatanode(DatanodeRegistration)
@return updated {@link org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration}, which contains
new storageID if the datanode did not have one and
registration ID for further communication.]]>
</doc>
</method>
<method name="sendHeartbeat" return="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="capacity" type="long"/>
<param name="dfsUsed" type="long"/>
<param name="remaining" type="long"/>
<param name="xmitsInProgress" type="int"/>
<param name="xceiverCount" type="int"/>
<param name="failedVolumes" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[sendHeartbeat() tells the NameNode that the DataNode is still
alive and well. Includes some status info, too.
It also gives the NameNode a chance to return
an array of "DatanodeCommand" objects.
A DatanodeCommand tells the DataNode to invalidate local block(s),
or to copy them to other DataNodes, etc.]]>
</doc>
</method>
<method name="blockReport" return="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="blocks" type="long[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[blockReport() tells the NameNode about all the locally-stored blocks.
The NameNode returns an array of Blocks that have become obsolete
and should be deleted. This function is meant to upload *all*
the locally-stored blocks. It's invoked upon startup and then
infrequently afterwards.
@param registration
@param blocks - the block list as an array of longs.
Each block is represented as 2 longs.
This is done instead of Block[] to reduce memory used by block reports.
@return - the next command for DN to process.
@throws IOException]]>
</doc>
</method>
<method name="blockReceived"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.Block[]"/>
<param name="delHints" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[blockReceived() allows the DataNode to tell the NameNode about
recently-received block data, with a hint for pereferred replica
to be deleted when there is any excessive blocks.
For example, whenever client code
writes a new Block here, or another DataNode copies a Block to
this DataNode, it will call blockReceived().]]>
</doc>
</method>
<method name="errorReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration"/>
<param name="errorCode" type="int"/>
<param name="msg" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[errorReport() tells the NameNode about something that has gone
awry. Useful for debugging.]]>
</doc>
</method>
<method name="versionRequest" return="org.apache.hadoop.hdfs.server.protocol.NamespaceInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="processUpgradeCommand" return="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="comm" type="org.apache.hadoop.hdfs.server.protocol.UpgradeCommand"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[This is a very general way to send a command to the name-node during
distributed upgrade process.
The generosity is because the variety of upgrade commands is unpredictable.
The reply from the name-node is also received in the form of an upgrade
command.
@return a reply in the form of an upgrade command]]>
</doc>
</method>
<method name="reportBadBlocks"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="blocks" type="org.apache.hadoop.hdfs.protocol.LocatedBlock[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[same as {@link org.apache.hadoop.hdfs.protocol.ClientProtocol#reportBadBlocks(LocatedBlock[])}
}]]>
</doc>
</method>
<method name="commitBlockSynchronization"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="block" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="newgenerationstamp" type="long"/>
<param name="newlength" type="long"/>
<param name="closeFile" type="boolean"/>
<param name="deleteblock" type="boolean"/>
<param name="newtargets" type="org.apache.hadoop.hdfs.protocol.DatanodeID[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Commit block synchronization in lease recovery]]>
</doc>
</method>
<field name="versionID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[26: remove getBlockLocations optimization]]>
</doc>
</field>
<field name="NOTIFY" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DISK_ERROR" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="INVALID_BLOCK" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FATAL_DISK_ERROR" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_UNKNOWN" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Determines actions that data node should perform
when receiving a datanode command.]]>
</doc>
</field>
<field name="DNA_TRANSFER" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_INVALIDATE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_SHUTDOWN" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_REGISTER" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_FINALIZE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_RECOVERBLOCK" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="DNA_ACCESSKEYUPDATE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Protocol that a DFS datanode uses to communicate with the NameNode.
It's used to upload current load information and block reports.
The only way a NameNode can communicate with a DataNode is by
returning values from these functions.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration -->
<class name="DatanodeRegistration" extends="org.apache.hadoop.hdfs.protocol.DatanodeID"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<implements name="org.apache.hadoop.hdfs.server.protocol.NodeRegistration"/>
<constructor name="DatanodeRegistration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Default constructor.]]>
</doc>
</constructor>
<constructor name="DatanodeRegistration" type="java.lang.String"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create DatanodeRegistration]]>
</doc>
</constructor>
<method name="setInfoPort"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="infoPort" type="int"/>
</method>
<method name="setIpcPort"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="ipcPort" type="int"/>
</method>
<method name="setStorageInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="storage" type="org.apache.hadoop.hdfs.server.datanode.DataStorage"/>
</method>
<method name="setName"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="name" type="java.lang.String"/>
</method>
<method name="getVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getRegistrationID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getAddress" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[{@inheritDoc}]]>
</doc>
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="to" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<field name="storageInfo" type="org.apache.hadoop.hdfs.server.common.StorageInfo"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<field name="exportedKeys" type="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
transient="false" volatile="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[DatanodeRegistration class contains all information the name-node needs
to identify and verify a data-node when it contacts the name-node.
This information is sent by data-node with each communication request.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.DatanodeRegistration -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException -->
<class name="DisallowedDatanodeException" extends="java.io.IOException"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DisallowedDatanodeException" type="org.apache.hadoop.hdfs.protocol.DatanodeID"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[This exception is thrown when a datanode tries to register or communicate
with the namenode when it does not appear on the list of included nodes,
or has been specifically excluded.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.DisallowedDatanodeException -->
<!-- start interface org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol -->
<interface name="InterDatanodeProtocol" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.ipc.VersionedProtocol"/>
<method name="initReplicaRecovery" return="org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="rBlock" type="org.apache.hadoop.hdfs.server.protocol.BlockRecoveryCommand.RecoveringBlock"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Initialize a replica recovery.
@return actual state of the replica on this data-node or
null if data-node does not have the replica.]]>
</doc>
</method>
<method name="updateReplicaUnderRecovery" return="org.apache.hadoop.hdfs.protocol.Block"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="oldBlock" type="org.apache.hadoop.hdfs.protocol.Block"/>
<param name="recoveryId" type="long"/>
<param name="newLength" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Update replica with the new generation stamp and length.]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="versionID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[5: getBlockMetaDataInfo(), updateBlock() removed.]]>
</doc>
</field>
<doc>
<![CDATA[An inter-datanode protocol for updating generation stamp]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.KeyUpdateCommand -->
<class name="KeyUpdateCommand" extends="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="KeyUpdateCommand" type="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getExportedKeys" return="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.KeyUpdateCommand -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.NamenodeCommand -->
<class name="NamenodeCommand" extends="org.apache.hadoop.hdfs.server.protocol.ServerCommand"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="NamenodeCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="NamenodeCommand" type="int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<doc>
<![CDATA[Base class for name-node command.
Issued by the name-node to notify other name-nodes what should be done.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.NamenodeCommand -->
<!-- start interface org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol -->
<interface name="NamenodeProtocol" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.ipc.VersionedProtocol"/>
<method name="getBlocks" return="org.apache.hadoop.hdfs.server.protocol.BlocksWithLocations"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="datanode" type="org.apache.hadoop.hdfs.protocol.DatanodeInfo"/>
<param name="size" type="long"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get a list of blocks belonging to <code>datanode</code>
whose total size equals <code>size</code>.
@see org.apache.hadoop.hdfs.server.balancer.Balancer
@param datanode a data node
@param size requested size
@return a list of blocks & their locations
@throws RemoteException if size is less than or equal to 0 or
datanode does not exist]]>
</doc>
</method>
<method name="getBlockKeys" return="org.apache.hadoop.hdfs.security.token.block.ExportedBlockKeys"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the current block keys
@return ExportedBlockKeys containing current block keys
@throws IOException]]>
</doc>
</method>
<method name="getEditLogSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="See {@link org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode}">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the size of the current edit log (in bytes).
@return The number of bytes in the current edit log.
@throws IOException
@deprecated
See {@link org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode}]]>
</doc>
</method>
<method name="rollEditLog" return="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="See {@link org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode}">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Closes the current edit log and opens a new one. The
call fails if the file system is in SafeMode.
@throws IOException
@return a unique token to identify this transaction.
@deprecated
See {@link org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode}]]>
</doc>
</method>
<method name="rollFsImage"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="See {@link org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode}">
<param name="sig" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Rolls the fsImage log. It removes the old fsImage, copies the
new image to fsImage, removes the old edits and renames edits.new
to edits. The call fails if any of the four files are missing.
@param sig the signature of this checkpoint (old fsimage)
@throws IOException
@deprecated
See {@link org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode}]]>
</doc>
</method>
<method name="versionRequest" return="org.apache.hadoop.hdfs.server.protocol.NamespaceInfo"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Request name-node version and storage information.
@return {@link NamespaceInfo} identifying versions and storage information
of the name-node
@throws IOException]]>
</doc>
</method>
<method name="errorReport"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="errorCode" type="int"/>
<param name="msg" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Report to the active name-node an error occurred on a subordinate node.
Depending on the error code the active node may decide to unregister the
reporting node.
@param registration requesting node.
@param errorCode indicates the error
@param msg free text description of the error
@throws IOException]]>
</doc>
</method>
<method name="register" return="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Register a subordinate name-node like backup node.
@return {@link NamenodeRegistration} of the node,
which this node has just registered with.]]>
</doc>
</method>
<method name="startCheckpoint" return="org.apache.hadoop.hdfs.server.protocol.NamenodeCommand"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[A request to the active name-node to start a checkpoint.
The name-node should decide whether to admit it or reject.
The name-node also decides what should be done with the backup node
image before and after the checkpoint.
@see CheckpointCommand
@see NamenodeCommand
@see #ACT_SHUTDOWN
@param registration the requesting node
@return {@link CheckpointCommand} if checkpoint is allowed.
@throws IOException]]>
</doc>
</method>
<method name="endCheckpoint"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="sig" type="org.apache.hadoop.hdfs.server.namenode.CheckpointSignature"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[A request to the active name-node to finalize
previously started checkpoint.
@param registration the requesting node
@param sig {@code CheckpointSignature} which identifies the checkpoint.
@throws IOException]]>
</doc>
</method>
<method name="journalSize" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Get the size of the active name-node journal (edit log) in bytes.
@param registration the requesting node
@return The number of bytes in the journal.
@throws IOException]]>
</doc>
</method>
<method name="journal"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="registration" type="org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration"/>
<param name="jAction" type="int"/>
<param name="length" type="int"/>
<param name="records" type="byte[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Journal edit records.
This message is sent by the active name-node to the backup node
via {@code EditLogBackupOutputStream} in order to synchronize meta-data
changes with the backup namespace image.
@param registration active node registration
@param jAction journal action
@param length length of the byte array
@param records byte array containing serialized journal records
@throws IOException]]>
</doc>
</method>
<field name="versionID" type="long"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Compared to the previous version the following changes have been introduced:
(Only the latest change is reflected.
The log of historical changes can be retrieved from the svn).
5: Added one parameter to rollFSImage() and
changed the definition of CheckpointSignature]]>
</doc>
</field>
<field name="NOTIFY" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="FATAL" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="JA_IS_ALIVE" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="JA_JOURNAL" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="JA_JSPOOL_START" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="JA_CHECKPOINT_TIME" type="byte"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ACT_UNKNOWN" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ACT_SHUTDOWN" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="ACT_CHECKPOINT" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[Protocol that a secondary NameNode uses to communicate with the NameNode.
It's used to get part of the name node state]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol -->
<!-- start interface org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols -->
<interface name="NamenodeProtocols" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.protocol.ClientProtocol"/>
<implements name="org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol"/>
<implements name="org.apache.hadoop.hdfs.server.protocol.NamenodeProtocol"/>
<implements name="org.apache.hadoop.security.authorize.RefreshAuthorizationPolicyProtocol"/>
<implements name="org.apache.hadoop.security.RefreshUserMappingsProtocol"/>
<doc>
<![CDATA[The full set of RPC methods implemented by the Namenode.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.protocol.NamenodeProtocols -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration -->
<class name="NamenodeRegistration" extends="org.apache.hadoop.hdfs.server.common.StorageInfo"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.server.protocol.NodeRegistration"/>
<constructor name="NamenodeRegistration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="NamenodeRegistration" type="java.lang.String, java.lang.String, org.apache.hadoop.hdfs.server.common.StorageInfo, org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getAddress" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getRegistrationID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getRole" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get name-node role.]]>
</doc>
</method>
<method name="isRole" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="that" type="org.apache.hadoop.hdfs.server.common.HdfsConstants.NamenodeRole"/>
</method>
<method name="getCheckpointTime" return="long"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the age of the image.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Information sent by a subordinate name-node to the active name-node
during the registration process.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.NamenodeRegistration -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.NamespaceInfo -->
<class name="NamespaceInfo" extends="org.apache.hadoop.hdfs.server.common.StorageInfo"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="NamespaceInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="NamespaceInfo" type="int, long, int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getBuildVersion" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getDistributedUpgradeVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[NamespaceInfo is returned by the name-node in reply
to a data-node handshake.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.NamespaceInfo -->
<!-- start interface org.apache.hadoop.hdfs.server.protocol.NodeRegistration -->
<interface name="NodeRegistration" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<method name="getAddress" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get address of the server node.
@return hostname:portNumber]]>
</doc>
</method>
<method name="getRegistrationID" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get registration ID of the server node.]]>
</doc>
</method>
<method name="getVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get layout version of the server node.]]>
</doc>
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[Generic class specifying information, which need to be sent to the name-node
during the registration process.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.server.protocol.NodeRegistration -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo -->
<class name="ReplicaRecoveryInfo" extends="org.apache.hadoop.hdfs.protocol.Block"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="ReplicaRecoveryInfo"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="ReplicaRecoveryInfo" type="long, long, long, org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getOriginalReplicaState" return="org.apache.hadoop.hdfs.server.common.HdfsConstants.ReplicaState"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Replica recovery information.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.ReplicaRecoveryInfo -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.ServerCommand -->
<class name="ServerCommand" extends="java.lang.Object"
abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.io.Writable"/>
<constructor name="ServerCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Unknown server command constructor.
Creates a command with action 0.
@see NamenodeProtocol#ACT_UNKNOWN
@see DatanodeProtocol#DNA_UNKNOWN]]>
</doc>
</constructor>
<constructor name="ServerCommand" type="int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Create a command for the specified action.
Actions are protocol specific.
@see DatanodeProtocol
@see NamenodeProtocol
@param action]]>
</doc>
</constructor>
<method name="getAction" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get server command action.
@return action code.]]>
</doc>
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<doc>
<![CDATA[Base class for a server command.
Issued by the name-node to notify other servers what should be done.
Commands are defined by actions defined in respective protocols.
@see DatanodeProtocol
@see NamenodeProtocol]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.ServerCommand -->
<!-- start class org.apache.hadoop.hdfs.server.protocol.UpgradeCommand -->
<class name="UpgradeCommand" extends="org.apache.hadoop.hdfs.server.protocol.DatanodeCommand"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="UpgradeCommand"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<constructor name="UpgradeCommand" type="int, int, short"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getVersion" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="getCurrentStatus" return="short"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="write"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.DataOutput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="readFields"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="in" type="java.io.DataInput"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<field name="UC_ACTION_REPORT_STATUS" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<field name="UC_ACTION_START_UPGRADE" type="int"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[This as a generic distributed upgrade command.
During the upgrade cluster components send upgrade commands to each other
in order to obtain or share information with them.
It is supposed that each upgrade defines specific upgrade command by
deriving them from this class.
The upgrade command contains version of the upgrade, which is verified
on the receiving side and current status of the upgrade.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.server.protocol.UpgradeCommand -->
</package>
<package name="org.apache.hadoop.hdfs.tools">
<!-- start class org.apache.hadoop.hdfs.tools.DelegationTokenFetcher -->
<class name="DelegationTokenFetcher" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DelegationTokenFetcher"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[Command-line interface]]>
</doc>
</method>
<method name="getDTfromRemote" return="org.apache.hadoop.security.Credentials"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="nnAddr" type="java.lang.String"/>
<param name="renewer" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
</method>
<method name="renewDelegationToken" return="long"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="nnAddr" type="java.lang.String"/>
<param name="tok" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Renew a Delegation Token.
@param nnAddr the NameNode's address
@param tok the token to renew
@return the Date that the token will expire next.
@throws IOException]]>
</doc>
</method>
<method name="cancelDelegationToken"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="nnAddr" type="java.lang.String"/>
<param name="tok" type="org.apache.hadoop.security.token.Token"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Cancel a Delegation Token.
@param nnAddr the NameNode's address
@param tok the token to cancel
@throws IOException]]>
</doc>
</method>
<doc>
<![CDATA[Fetch a DelegationToken from the current Namenode and store it in the
specified file.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.DelegationTokenFetcher -->
<!-- start class org.apache.hadoop.hdfs.tools.DFSAdmin -->
<class name="DFSAdmin" extends="org.apache.hadoop.fs.FsShell"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DFSAdmin"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Construct a DFSAdmin object.]]>
</doc>
</constructor>
<constructor name="DFSAdmin" type="org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Construct a DFSAdmin object.]]>
</doc>
</constructor>
<method name="report"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Gives a report on how the FileSystem is doing.
@exception IOException if the filesystem does not exist.]]>
</doc>
</method>
<method name="setSafeMode"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<param name="idx" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Safe mode maintenance command.
Usage: java DFSAdmin -safemode [enter | leave | get]
@param argv List of of command line parameters.
@param idx The index of the command that is being processed.
@exception IOException if the filesystem does not exist.]]>
</doc>
</method>
<method name="saveNamespace" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Command to ask the namenode to save the namespace.
Usage: java DFSAdmin -saveNamespace
@exception IOException
@see org.apache.hadoop.hdfs.protocol.ClientProtocol#saveNamespace()]]>
</doc>
</method>
<method name="restoreFaileStorage" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="arg" type="java.lang.String"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Command to enable/disable/check restoring of failed storage replicas in the namenode.
Usage: java DFSAdmin -restoreFailedStorage true|false|check
@exception IOException
@see org.apache.hadoop.hdfs.protocol.ClientProtocol#restoreFailedStorage(String arg)]]>
</doc>
</method>
<method name="refreshNodes" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Command to ask the namenode to reread the hosts and excluded hosts
file.
Usage: java DFSAdmin -refreshNodes
@exception IOException]]>
</doc>
</method>
<method name="finalizeUpgrade" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Command to ask the namenode to finalize previously performed upgrade.
Usage: java DFSAdmin -finalizeUpgrade
@exception IOException]]>
</doc>
</method>
<method name="upgradeProgress" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<param name="idx" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Command to request current distributed upgrade status,
a detailed status, or to force the upgrade to proceed.
Usage: java DFSAdmin -upgradeProgress [status | details | force]
@exception IOException]]>
</doc>
</method>
<method name="metaSave" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<param name="idx" type="int"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Dumps DFS data structures into specified file.
Usage: java DFSAdmin -metasave filename
@param argv List of of command line parameters.
@param idx The index of the command that is being processed.
@exception IOException if an error accoured wile accessing
the file or path.]]>
</doc>
</method>
<method name="printTopology" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Display each rack and the nodes assigned to that rack, as determined
by the NameNode, in a hierarchical manner. The nodes and racks are
sorted alphabetically.
@throws IOException If an error while getting datanode report]]>
</doc>
</method>
<method name="refreshServiceAcl" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Refresh the authorization policy on the {@link NameNode}.
@return exitcode 0 on success, non-zero on failure
@throws IOException]]>
</doc>
</method>
<method name="refreshUserToGroupsMappings" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Refresh the user-to-groups mappings on the {@link NameNode}.
@return exitcode 0 on success, non-zero on failure
@throws IOException]]>
</doc>
</method>
<method name="refreshSuperUserGroupsConfiguration" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[refreshSuperUserGroupsConfiguration {@link NameNode}.
@return exitcode 0 on success, non-zero on failure
@throws IOException]]>
</doc>
</method>
<method name="run" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[@param argv The parameters passed to this program.
@exception Exception if the filesystem does not exist.
@return 0 on success, non zero on error.]]>
</doc>
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="argv" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[main() has some simple utility methods.
@param argv Command line parameters.
@exception Exception if the filesystem does not exist.]]>
</doc>
</method>
<doc>
<![CDATA[This class provides some DFS administrative access.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.DFSAdmin -->
<!-- start class org.apache.hadoop.hdfs.tools.DFSck -->
<class name="DFSck" extends="org.apache.hadoop.conf.Configured"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.util.Tool"/>
<constructor name="DFSck" type="org.apache.hadoop.conf.Configuration"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Filesystem checker.
@param conf current Configuration]]>
</doc>
</constructor>
<constructor name="DFSck" type="org.apache.hadoop.conf.Configuration, java.io.PrintStream"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</constructor>
<method name="run" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@param args]]>
</doc>
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<exception name="Exception" type="java.lang.Exception"/>
</method>
<doc>
<![CDATA[This class provides rudimentary checking of DFS volumes for errors and
sub-optimal conditions.
<p>The tool scans all files and directories, starting from an indicated
root path. The following abnormal conditions are detected and handled:</p>
<ul>
<li>files with blocks that are completely missing from all datanodes.<br/>
In this case the tool can perform one of the following actions:
<ul>
<li>none ({@link org.apache.hadoop.hdfs.server.namenode.NamenodeFsck#FIXING_NONE})</li>
<li>move corrupted files to /lost+found directory on DFS
({@link org.apache.hadoop.hdfs.server.namenode.NamenodeFsck#FIXING_MOVE}). Remaining data blocks are saved as a
block chains, representing longest consecutive series of valid blocks.</li>
<li>delete corrupted files ({@link org.apache.hadoop.hdfs.server.namenode.NamenodeFsck#FIXING_DELETE})</li>
</ul>
</li>
<li>detect files with under-replicated or over-replicated blocks</li>
</ul>
Additionally, the tool collects a detailed overall DFS statistics, and
optionally can print detailed statistics on block locations and replication
factors of each file.
The tool also provides and option to filter open files during the scan.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.DFSck -->
<!-- start class org.apache.hadoop.hdfs.tools.HDFSConcat -->
<class name="HDFSConcat" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="HDFSConcat"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[@param args]]>
</doc>
</method>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.HDFSConcat -->
<!-- start class org.apache.hadoop.hdfs.tools.JMXGet -->
<class name="JMXGet" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="JMXGet"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="setService"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="service" type="java.lang.String"/>
</method>
<method name="setPort"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="port" type="java.lang.String"/>
</method>
<method name="setServer"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="server" type="java.lang.String"/>
</method>
<method name="setLocalVMUrl"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="url" type="java.lang.String"/>
</method>
<method name="printAllValues"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[print all attributes' values]]>
</doc>
</method>
<method name="getValue" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.String"/>
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[get single value by key]]>
</doc>
</method>
<method name="init"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="Exception" type="java.lang.Exception"/>
<doc>
<![CDATA[@throws Exception
initializes MBeanServer]]>
</doc>
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<doc>
<![CDATA[main
@param args]]>
</doc>
</method>
<doc>
<![CDATA[tool to get data from NameNode or DataNode using MBeans currently the
following MBeans are available (under hadoop domain):
hadoop:service=NameNode,name=FSNamesystemState (static)
hadoop:service=NameNode,name=NameNodeActivity (dynamic)
hadoop:service=NameNode,name=RpcActivityForPort9000 (dynamic)
hadoop:service=DataNode,name=RpcActivityForPort50020 (dynamic)
hadoop:name=service=DataNode,FSDatasetState-UndefinedStorageId663800459
(static)
hadoop:service=DataNode,name=DataNodeActivity-UndefinedStorageId-520845215
(dynamic)
implementation note: all logging is sent to System.err (since it is a command
line tool)]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.JMXGet -->
</package>
<package name="org.apache.hadoop.hdfs.tools.offlineImageViewer">
<!-- start class org.apache.hadoop.hdfs.tools.offlineImageViewer.NameDistributionVisitor -->
<class name="NameDistributionVisitor" extends="org.apache.hadoop.hdfs.tools.offlineImageViewer.TextWriterImageVisitor"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="NameDistributionVisitor" type="java.lang.String, boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
</constructor>
<doc>
<![CDATA[File name distribution visitor.
<p>
It analyzes file names in fsimage and prints the following information:
<li>Number of unique file names</li>
<li>Number file names and the corresponding number range of files that use
these same names</li>
<li>Heap saved if the file name objects are reused</li>]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.offlineImageViewer.NameDistributionVisitor -->
<!-- start class org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer -->
<class name="OfflineImageViewer" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="OfflineImageViewer" type="java.lang.String, org.apache.hadoop.hdfs.tools.offlineImageViewer.ImageVisitor, boolean"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="go"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Process image file.]]>
</doc>
</method>
<method name="buildOptions" return="org.apache.commons.cli.Options"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Build command-line options and descriptions]]>
</doc>
</method>
<method name="main"
abstract="false" native="false" synchronized="false"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<param name="args" type="java.lang.String[]"/>
<exception name="IOException" type="java.io.IOException"/>
<doc>
<![CDATA[Entry point to command-line-driven operation. User may specify
options and start fsimage viewer from the command line. Program
will process image file and exit cleanly or, if an error is
encountered, inform user and exit.
@param args Command line options
@throws IOException]]>
</doc>
</method>
<doc>
<![CDATA[OfflineImageViewer to dump the contents of an Hadoop image file to XML
or the console. Main entry point into utility, either via the
command line or programatically.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer -->
</package>
<package name="org.apache.hadoop.hdfs.util">
<!-- start class org.apache.hadoop.hdfs.util.ByteArray -->
<class name="ByteArray" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="ByteArray" type="byte[]"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="getBytes" return="byte[]"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="hashCode" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="equals" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="o" type="java.lang.Object"/>
</method>
<doc>
<![CDATA[Wrapper for byte[] to use byte[] as key in HashMap]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.util.ByteArray -->
<!-- start class org.apache.hadoop.hdfs.util.DataTransferThrottler -->
<class name="DataTransferThrottler" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<constructor name="DataTransferThrottler" type="long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor
@param bandwidthPerSec bandwidth allowed in bytes per second.]]>
</doc>
</constructor>
<constructor name="DataTransferThrottler" type="long, long"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Constructor
@param period in milliseconds. Bandwidth is enforced over this
period.
@param bandwidthPerSec bandwidth allowed in bytes per second.]]>
</doc>
</constructor>
<method name="getBandwidth" return="long"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return current throttle bandwidth in bytes per second.]]>
</doc>
</method>
<method name="setBandwidth"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="bytesPerSecond" type="long"/>
<doc>
<![CDATA[Sets throttle bandwidth. This takes affect latest by the end of current
period.
@param bytesPerSecond]]>
</doc>
</method>
<method name="throttle"
abstract="false" native="false" synchronized="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="numOfBytes" type="long"/>
<doc>
<![CDATA[Given the numOfBytes sent/received since last time throttle was called,
make the current thread sleep if I/O rate is too fast
compared to the given bandwidth.
@param numOfBytes
number of bytes sent/received since last time throttle was called]]>
</doc>
</method>
<doc>
<![CDATA[a class to throttle the data transfers.
This class is thread safe. It can be shared by multiple threads.
The parameter bandwidthPerSec specifies the total bandwidth shared by
threads.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.util.DataTransferThrottler -->
<!-- start interface org.apache.hadoop.hdfs.util.GSet -->
<interface name="GSet" abstract="true"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="java.lang.Iterable"/>
<method name="size" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@return The size of this set.]]>
</doc>
</method>
<method name="contains" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.Object"/>
<doc>
<![CDATA[Does this set contain an element corresponding to the given key?
@param key The given key.
@return true if the given key equals to a stored element.
Otherwise, return false.
@throws NullPointerException if key == null.]]>
</doc>
</method>
<method name="get" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.Object"/>
<doc>
<![CDATA[Return the stored element which is equal to the given key.
This operation is similar to {@link java.util.Map#get(Object)}.
@param key The given key.
@return The stored element if it exists.
Otherwise, return null.
@throws NullPointerException if key == null.]]>
</doc>
</method>
<method name="put" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="element" type="java.lang.Object"/>
<doc>
<![CDATA[Add/replace an element.
If the element does not exist, add it to the set.
Otherwise, replace the existing element.
Note that this operation
is similar to {@link java.util.Map#put(Object, Object)}
but is different from {@link java.util.Set#add(Object)}
which does not replace the existing element if there is any.
@param element The element being put.
@return the previous stored element if there is any.
Otherwise, return null.
@throws NullPointerException if element == null.]]>
</doc>
</method>
<method name="remove" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.Object"/>
<doc>
<![CDATA[Remove the element corresponding to the given key.
This operation is similar to {@link java.util.Map#remove(Object)}.
@param key The key of the element being removed.
@return If such element exists, return it.
Otherwise, return null.
@throws NullPointerException if key == null.]]>
</doc>
</method>
<doc>
<![CDATA[A {@link GSet} is set,
which supports the {@link #get(Object)} operation.
The {@link #get(Object)} operation uses a key to lookup an element.
Null element is not supported.
@param <K> The type of the keys.
@param <E> The type of the elements, which must be a subclass of the keys.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.util.GSet -->
<!-- start class org.apache.hadoop.hdfs.util.GSetByHashMap -->
<class name="GSetByHashMap" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.util.GSet"/>
<constructor name="GSetByHashMap" type="int, float"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</constructor>
<method name="size" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="contains" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="k" type="java.lang.Object"/>
</method>
<method name="get" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="k" type="java.lang.Object"/>
</method>
<method name="put" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="element" type="java.lang.Object"/>
</method>
<method name="remove" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="k" type="java.lang.Object"/>
</method>
<method name="iterator" return="java.util.Iterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<doc>
<![CDATA[A {@link GSet} implementation by {@link HashMap}.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.util.GSetByHashMap -->
<!-- start class org.apache.hadoop.hdfs.util.LightWeightGSet -->
<class name="LightWeightGSet" extends="java.lang.Object"
abstract="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<implements name="org.apache.hadoop.hdfs.util.GSet"/>
<constructor name="LightWeightGSet" type="int"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[@param recommended_length Recommended size of the internal array.]]>
</doc>
</constructor>
<method name="size" return="int"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="get" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.Object"/>
</method>
<method name="contains" return="boolean"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.Object"/>
</method>
<method name="put" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="element" type="java.lang.Object"/>
</method>
<method name="remove" return="java.lang.Object"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="key" type="java.lang.Object"/>
</method>
<method name="iterator" return="java.util.Iterator"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="toString" return="java.lang.String"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
</method>
<method name="printDetails"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="out" type="java.io.PrintStream"/>
<doc>
<![CDATA[Print detailed information of this object.]]>
</doc>
</method>
<field name="LOG" type="org.apache.commons.logging.Log"
transient="false" volatile="false"
static="true" final="true" visibility="public"
deprecated="not deprecated">
</field>
<doc>
<![CDATA[A low memory footprint {@link GSet} implementation,
which uses an array for storing the elements
and linked lists for collision resolution.
No rehash will be performed.
Therefore, the internal array will never be resized.
This class does not support null element.
This class is not thread safe.
@param <K> Key type for looking up the elements
@param <E> Element type, which must be
(1) a subclass of K, and
(2) implementing {@link LinkedElement} interface.]]>
</doc>
</class>
<!-- end class org.apache.hadoop.hdfs.util.LightWeightGSet -->
<!-- start interface org.apache.hadoop.hdfs.util.LightWeightGSet.LinkedElement -->
<interface name="LightWeightGSet.LinkedElement" abstract="true"
static="true" final="false" visibility="public"
deprecated="not deprecated">
<method name="setNext"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<param name="next" type="org.apache.hadoop.hdfs.util.LightWeightGSet.LinkedElement"/>
<doc>
<![CDATA[Set the next element.]]>
</doc>
</method>
<method name="getNext" return="org.apache.hadoop.hdfs.util.LightWeightGSet.LinkedElement"
abstract="false" native="false" synchronized="false"
static="false" final="false" visibility="public"
deprecated="not deprecated">
<doc>
<![CDATA[Get the next element.]]>
</doc>
</method>
<doc>
<![CDATA[Elements of {@link LightWeightGSet}.]]>
</doc>
</interface>
<!-- end interface org.apache.hadoop.hdfs.util.LightWeightGSet.LinkedElement -->
</package>
</api>
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