org.apache.hadoop.mapred
Interface AdminOperationsProtocol

All Superinterfaces:

VersionedProtocol

All Known Implementing Classes:

JobTracker

public interface AdminOperationsProtocol
extends VersionedProtocol

Protocol for admin operations. This is a framework-public interface and is NOT_TO_BE_USED_BY_USERS_DIRECTLY.

Field Summary

static long

versionID Version 1: Initial version.

Method Summary

void	refreshNodes() Refresh the node list at the JobTracker
void	refreshQueues() Refresh the queue acls in use currently.
boolean	setSafeMode(JobTracker.SafeModeAction safeModeAction) Set safe mode for the JobTracker.

Methods inherited from interface org.apache.hadoop.ipc.VersionedProtocol

getProtocolVersion

Field Detail

versionID

static final long versionID

Version 1: Initial version. Added refreshQueueAcls. Version 2: Added node refresh facility Version 3: Changed refreshQueueAcls to refreshQueues

See Also:

Constant Field Values

Method Detail

refreshQueues

void refreshQueues()
                   throws IOException

Refresh the queue acls in use currently. Refresh the queues used by the jobtracker and scheduler. Access control lists and queue states are refreshed.

Throws:

IOException

refreshNodes

void refreshNodes()
                  throws IOException

Refresh the node list at the JobTracker

Throws:

IOException

setSafeMode

boolean setSafeMode(JobTracker.SafeModeAction safeModeAction)
                    throws IOException

Set safe mode for the JobTracker.

Parameters:

safeModeAction - safe mode action

Returns:

current safemode

Throws:

IOException