org.apache.hadoop.mapred.tools
Class MRAdmin

java.lang.Object
  org.apache.hadoop.conf.Configured
      org.apache.hadoop.mapred.tools.MRAdmin

All Implemented Interfaces:

Configurable, Tool

public class MRAdmin
extends Configured
implements Tool

Administrative access to Hadoop Map-Reduce. Currently it only provides the ability to connect to the JobTracker and 1) refresh the service-level authorization policy, 2) refresh queue acl properties.

Constructor Summary

MRAdmin()

MRAdmin(Configuration conf)

Method Summary

static void	main(String[] args)
int	refreshSuperUserGroupsConfiguration() refreshSuperUserGroupsConfiguration JobTracker.
int	run(String[] args) Execute the command with the given arguments.

Methods inherited from class org.apache.hadoop.conf.Configured

getConf, setConf

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.hadoop.conf.Configurable

getConf, setConf

Constructor Detail

MRAdmin

public MRAdmin()

MRAdmin

public MRAdmin(Configuration conf)

Method Detail

refreshSuperUserGroupsConfiguration

public int refreshSuperUserGroupsConfiguration()
                                        throws IOException

refreshSuperUserGroupsConfiguration JobTracker.

Returns:

exitcode 0 on success, non-zero on failure

Throws:

IOException

run

public int run(String[] args)
        throws Exception

Description copied from interface: Tool

Execute the command with the given arguments.

Specified by:

run in interface Tool

Parameters:

args - command specific arguments.

Returns:

exit code.

Throws:

Exception

main

public static void main(String[] args)
                 throws Exception

Throws:

Exception