org.apache.hadoop.mapred.tools

Class MRAdmin

java.lang.Object

org.apache.hadoop.conf.Configured

org.apache.hadoop.mapred.tools.MRAdmin

All Implemented Interfaces:

org.apache.hadoop.conf.Configurable, org.apache.hadoop.util.Tool

@InterfaceAudience.Private
public class MRAdmin
extends org.apache.hadoop.conf.Configured
implements org.apache.hadoop.util.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

Constructors

Constructor and Description
MRAdmin()
MRAdmin(org.apache.hadoop.conf.Configuration conf)

Method Summary

Methods

Modifier and Type	Method and Description
static void	main(String[] args)
int	refreshSuperUserGroupsConfiguration() refreshSuperUserGroupsConfiguration JobTracker.
int	run(String[] args)
void	setConf(org.apache.hadoop.conf.Configuration conf)

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

getConf

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

Constructor Detail

MRAdmin

public MRAdmin()

MRAdmin

public MRAdmin(org.apache.hadoop.conf.Configuration conf)

Method Detail

setConf

public void setConf(org.apache.hadoop.conf.Configuration conf)

Specified by:

setConf in interface org.apache.hadoop.conf.Configurable

Overrides:

setConf in class org.apache.hadoop.conf.Configured

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

Specified by:

run in interface org.apache.hadoop.util.Tool

Throws:

Exception

main

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

Throws:

Exception