org.apache.hadoop.mapreduce.v2.app
Class TaskHeartbeatHandler

java.lang.Object
  org.apache.hadoop.service.AbstractService
      org.apache.hadoop.mapreduce.v2.app.TaskHeartbeatHandler

All Implemented Interfaces:

Closeable, org.apache.hadoop.service.Service

public class TaskHeartbeatHandler
extends org.apache.hadoop.service.AbstractService

This class keeps track of tasks that have already been launched. It determines if a task is alive and running or marks a task as dead if it does not hear from it for a long time.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.service.Service

org.apache.hadoop.service.Service.STATE

Constructor Summary

TaskHeartbeatHandler(org.apache.hadoop.yarn.event.EventHandler eventHandler, org.apache.hadoop.yarn.util.Clock clock, int numThreads)

Method Summary

void	progressing(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)
void	register(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)
protected void	serviceInit(org.apache.hadoop.conf.Configuration conf)
protected void	serviceStart()
protected void	serviceStop()
void	unregister(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)

Methods inherited from class org.apache.hadoop.service.AbstractService

close, getBlockers, getConfig, getFailureCause, getFailureState, getLifecycleHistory, getName, getServiceState, getStartTime, init, isInState, noteFailure, putBlocker, registerGlobalListener, registerServiceListener, removeBlocker, setConfig, start, stop, toString, unregisterGlobalListener, unregisterServiceListener, waitForServiceToStop

Methods inherited from class java.lang.Object

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

Constructor Detail

TaskHeartbeatHandler

public TaskHeartbeatHandler(org.apache.hadoop.yarn.event.EventHandler eventHandler,
                            org.apache.hadoop.yarn.util.Clock clock,
                            int numThreads)

Method Detail

serviceInit

protected void serviceInit(org.apache.hadoop.conf.Configuration conf)
                    throws Exception

Overrides:

serviceInit in class org.apache.hadoop.service.AbstractService

Throws:

Exception

serviceStart

protected void serviceStart()
                     throws Exception

Overrides:

serviceStart in class org.apache.hadoop.service.AbstractService

Throws:

Exception

serviceStop

protected void serviceStop()
                    throws Exception

Overrides:

serviceStop in class org.apache.hadoop.service.AbstractService

Throws:

Exception

progressing

public void progressing(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)

register

public void register(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)

unregister

public void unregister(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)