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R3704/hadoop-2.3.0-src/hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/hdfs/block_info_xml.jsp
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block_info_xml.jsp
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<?xml version="1.0" encoding="UTF-8"?><%!
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
This script outputs information about a block (as XML). The script accepts a
GET parameter named blockId which should be block id (as a long).
Example output is below (the blockId was 8888705098093096373):
<block_info>
<block_id>8888705098093096373</block_id>
<block_name>blk_8888705098093096373</block_name>
<file>
<local_name>some_file_name</local_name>
<local_directory>/input/</local_directory>
<user_name>user_name</user_name>
<group_name>supergroup</group_name>
<is_directory>false</is_directory>
<access_time>1251166313680</access_time>
<is_under_construction>false</is_under_construction>
<ds_quota>-1</ds_quota>
<permission_status>user_name:supergroup:rw-r--r--</permission_status>
<replication>1</replication>
<disk_space_consumed>2815</disk_space_consumed>
<preferred_block_size>67108864</preferred_block_size>
</file>
<replicas>
<replica>
<host_name>hostname</host_name>
<is_corrupt>false</is_corrupt>
</replica>
</replicas>
</block_info>
Notes:
- block_info/file will only exist if the file can be found
- block_info/replicas can contain 0 or more children
- If an error exists, block_info/error will exist and contain a human
readable error message
*/
%>
<%@ page
contentType="application/xml"
import="org.apache.hadoop.hdfs.server.namenode.NamenodeJspHelper.XMLBlockInfo"
import="org.apache.hadoop.hdfs.server.common.JspHelper"
import="org.znerd.xmlenc.*"
%>
<%!
//for java.io.Serializable
private static final long serialVersionUID = 1L;
%>
<%
NameNode nn = NameNodeHttpServer.getNameNodeFromContext(application);
String namenodeRole = nn.getRole().toString();
FSNamesystem fsn = nn.getNamesystem();
Long blockId = null;
try {
blockId = JspHelper.validateLong(request.getParameter("blockId"));
} catch(NumberFormatException e) {
blockId = null;
}
XMLBlockInfo bi = new XMLBlockInfo(fsn, blockId);
XMLOutputter doc = new XMLOutputter(out, "UTF-8");
bi.toXML(doc);
%>
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