org.apache.tez.dag.app
Class TaskHeartbeatHandler

java.lang.Object
  org.apache.hadoop.service.AbstractService
      org.apache.tez.dag.app.HeartbeatHandlerBase<org.apache.tez.dag.records.TezTaskAttemptID>
          org.apache.tez.dag.app.TaskHeartbeatHandler

All Implemented Interfaces:

Closeable, org.apache.hadoop.service.Service

public class TaskHeartbeatHandler
extends HeartbeatHandlerBase<org.apache.tez.dag.records.TezTaskAttemptID>

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 class org.apache.tez.dag.app.HeartbeatHandlerBase

HeartbeatHandlerBase.ReportTime

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

org.apache.hadoop.service.Service.STATE

Field Summary

Fields inherited from class org.apache.tez.dag.app.HeartbeatHandlerBase

appContext, clock, eventHandler, timeOut, timeOutCheckerThread, timeOutCheckInterval

Constructor Summary

TaskHeartbeatHandler(AppContext context, int expectedConcurrency)

Method Summary

protected int	getConfiguredTimeout(org.apache.hadoop.conf.Configuration conf)
protected int	getConfiguredTimeoutCheckInterval(org.apache.hadoop.conf.Configuration conf)
protected void	handleTimeOut(org.apache.tez.dag.records.TezTaskAttemptID attemptId)
protected boolean	hasTimedOut(HeartbeatHandlerBase.ReportTime report, long currentTime)

Methods inherited from class org.apache.tez.dag.app.HeartbeatHandlerBase

createPingChecker, pinged, progressing, register, serviceInit, serviceStart, serviceStop, unregister

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(AppContext context,
                            int expectedConcurrency)

Method Detail

getConfiguredTimeout

protected int getConfiguredTimeout(org.apache.hadoop.conf.Configuration conf)

Specified by:

getConfiguredTimeout in class HeartbeatHandlerBase<org.apache.tez.dag.records.TezTaskAttemptID>

getConfiguredTimeoutCheckInterval

protected int getConfiguredTimeoutCheckInterval(org.apache.hadoop.conf.Configuration conf)

Specified by:

getConfiguredTimeoutCheckInterval in class HeartbeatHandlerBase<org.apache.tez.dag.records.TezTaskAttemptID>

hasTimedOut

protected boolean hasTimedOut(HeartbeatHandlerBase.ReportTime report,
                              long currentTime)

Specified by:

hasTimedOut in class HeartbeatHandlerBase<org.apache.tez.dag.records.TezTaskAttemptID>

handleTimeOut

protected void handleTimeOut(org.apache.tez.dag.records.TezTaskAttemptID attemptId)

Specified by:

handleTimeOut in class HeartbeatHandlerBase<org.apache.tez.dag.records.TezTaskAttemptID>