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hadoop.cmd
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Tue, Feb 25, 11:25

hadoop.cmd
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@echo off
@rem Licensed to the Apache Software Foundation (ASF) under one or more
@rem contributor license agreements. See the NOTICE file distributed with
@rem this work for additional information regarding copyright ownership.
@rem The ASF licenses this file to You under the Apache License, Version 2.0
@rem (the "License"); you may not use this file except in compliance with
@rem the License. You may obtain a copy of the License at
@rem
@rem http://www.apache.org/licenses/LICENSE-2.0
@rem
@rem Unless required by applicable law or agreed to in writing, software
@rem distributed under the License is distributed on an "AS IS" BASIS,
@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
@rem See the License for the specific language governing permissions and
@rem limitations under the License.
@rem This script runs the hadoop core commands.
@rem Environment Variables
@rem
@rem JAVA_HOME The java implementation to use. Overrides JAVA_HOME.
@rem
@rem HADOOP_CLASSPATH Extra Java CLASSPATH entries.
@rem
@rem HADOOP_USER_CLASSPATH_FIRST When defined, the HADOOP_CLASSPATH is
@rem added in the beginning of the global
@rem classpath. Can be defined, for example,
@rem by doing
@rem export HADOOP_USER_CLASSPATH_FIRST=true
@rem
@rem HADOOP_HEAPSIZE The maximum amount of heap to use, in MB.
@rem Default is 1000.
@rem
@rem HADOOP_OPTS Extra Java runtime options.
@rem
@rem HADOOP_CLIENT_OPTS when the respective command is run.
@rem HADOOP_{COMMAND}_OPTS etc HADOOP_JT_OPTS applies to JobTracker
@rem for e.g. HADOOP_CLIENT_OPTS applies to
@rem more than one command (fs, dfs, fsck,
@rem dfsadmin etc)
@rem
@rem HADOOP_CONF_DIR Alternate conf dir. Default is ${HADOOP_HOME}/conf.
@rem
@rem HADOOP_ROOT_LOGGER The root appender. Default is INFO,console
@rem
if not defined HADOOP_BIN_PATH (
set HADOOP_BIN_PATH=%~dp0
)
if "%HADOOP_BIN_PATH:~-1%" == "\" (
set HADOOP_BIN_PATH=%HADOOP_BIN_PATH:~0,-1%
)
call :updatepath %HADOOP_BIN_PATH%
:main
setlocal enabledelayedexpansion
set DEFAULT_LIBEXEC_DIR=%HADOOP_BIN_PATH%\..\libexec
if not defined HADOOP_LIBEXEC_DIR (
set HADOOP_LIBEXEC_DIR=%DEFAULT_LIBEXEC_DIR%
)
call %HADOOP_LIBEXEC_DIR%\hadoop-config.cmd %*
if "%1" == "--config" (
shift
shift
)
set hadoop-command=%1
if not defined hadoop-command (
goto print_usage
)
call :make_command_arguments %*
set hdfscommands=namenode secondarynamenode datanode dfs dfsadmin fsck balancer fetchdt oiv dfsgroups
for %%i in ( %hdfscommands% ) do (
if %hadoop-command% == %%i set hdfscommand=true
)
if defined hdfscommand (
@echo DEPRECATED: Use of this script to execute hdfs command is deprecated. 1>&2
@echo Instead use the hdfs command for it. 1>&2
if exist %HADOOP_HDFS_HOME%\bin\hdfs.cmd (
call %HADOOP_HDFS_HOME%\bin\hdfs.cmd %*
goto :eof
) else if exist %HADOOP_HOME%\bin\hdfs.cmd (
call %HADOOP_HOME%\bin\hdfs.cmd %*
goto :eof
) else (
echo HADOOP_HDFS_HOME not found!
goto :eof
)
)
set mapredcommands=pipes job queue mrgroups mradmin jobtracker tasktracker
for %%i in ( %mapredcommands% ) do (
if %hadoop-command% == %%i set mapredcommand=true
)
if defined mapredcommand (
@echo DEPRECATED: Use of this script to execute mapred command is deprecated. 1>&2
@echo Instead use the mapred command for it. 1>&2
if exist %HADOOP_MAPRED_HOME%\bin\mapred.cmd (
call %HADOOP_MAPRED_HOME%\bin\mapred.cmd %*
goto :eof
) else if exist %HADOOP_HOME%\bin\mapred.cmd (
call %HADOOP_HOME%\bin\mapred.cmd %*
goto :eof
) else (
echo HADOOP_MAPRED_HOME not found!
goto :eof
)
)
if %hadoop-command% == classpath (
@echo %CLASSPATH%
goto :eof
)
set corecommands=fs version jar checknative distcp daemonlog archive
for %%i in ( %corecommands% ) do (
if %hadoop-command% == %%i set corecommand=true
)
if defined corecommand (
call :%hadoop-command%
) else (
set CLASSPATH=%CLASSPATH%;%CD%
set CLASS=%hadoop-command%
)
set path=%PATH%;%HADOOP_BIN_PATH%
@rem Always respect HADOOP_OPTS and HADOOP_CLIENT_OPTS
set HADOOP_OPTS=%HADOOP_OPTS% %HADOOP_CLIENT_OPTS%
@rem make sure security appender is turned off
if not defined HADOOP_SECURITY_LOGGER (
set HADOOP_SECURITY_LOGGER=INFO,NullAppender
)
set HADOOP_OPTS=%HADOOP_OPTS% -Dhadoop.security.logger=%HADOOP_SECURITY_LOGGER%
call %JAVA% %JAVA_HEAP_MAX% %HADOOP_OPTS% -classpath %CLASSPATH% %CLASS% %hadoop-command-arguments%
exit /b %ERRORLEVEL%
:fs
set CLASS=org.apache.hadoop.fs.FsShell
goto :eof
:version
set CLASS=org.apache.hadoop.util.VersionInfo
goto :eof
:jar
set CLASS=org.apache.hadoop.util.RunJar
goto :eof
:checknative
set CLASS=org.apache.hadoop.util.NativeLibraryChecker
goto :eof
:distcp
set CLASS=org.apache.hadoop.tools.DistCp
set CLASSPATH=%CLASSPATH%;%TOOL_PATH%
goto :eof
:daemonlog
set CLASS=org.apache.hadoop.log.LogLevel
goto :eof
:archive
set CLASS=org.apache.hadoop.tools.HadoopArchives
set CLASSPATH=%CLASSPATH%;%TOOL_PATH%
goto :eof
:updatepath
set path_to_add=%*
set current_path_comparable=%path%
set current_path_comparable=%current_path_comparable: =_%
set current_path_comparable=%current_path_comparable:(=_%
set current_path_comparable=%current_path_comparable:)=_%
set path_to_add_comparable=%path_to_add%
set path_to_add_comparable=%path_to_add_comparable: =_%
set path_to_add_comparable=%path_to_add_comparable:(=_%
set path_to_add_comparable=%path_to_add_comparable:)=_%
for %%i in ( %current_path_comparable% ) do (
if /i "%%i" == "%path_to_add_comparable%" (
set path_to_add_exist=true
)
)
set system_path_comparable=
set path_to_add_comparable=
if not defined path_to_add_exist path=%path_to_add%;%path%
set path_to_add=
goto :eof
@rem This changes %1, %2 etc. Hence those cannot be used after calling this.
:make_command_arguments
if "%1" == "--config" (
shift
shift
)
if [%2] == [] goto :eof
shift
set _arguments=
:MakeCmdArgsLoop
if [%1]==[] goto :EndLoop
if not defined _arguments (
set _arguments=%1
) else (
set _arguments=!_arguments! %1
)
shift
goto :MakeCmdArgsLoop
:EndLoop
set hadoop-command-arguments=%_arguments%
goto :eof
:print_usage
@echo Usage: hadoop [--config confdir] COMMAND
@echo where COMMAND is one of:
@echo fs run a generic filesystem user client
@echo version print the version
@echo jar ^<jar^> run a jar file
@echo checknative [-a^|-h] check native hadoop and compression libraries availability
@echo distcp ^<srcurl^> ^<desturl^> copy file or directories recursively
@echo archive -archiveName NAME -p ^<parent path^> ^<src^>* ^<dest^> create a hadoop archive
@echo classpath prints the class path needed to get the
@echo Hadoop jar and the required libraries
@echo daemonlog get/set the log level for each daemon
@echo or
@echo CLASSNAME run the class named CLASSNAME
@echo.
@echo Most commands print help when invoked w/o parameters.
endlocal

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