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

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

All Implemented Interfaces:

org.apache.hadoop.yarn.service.Service

public class TaskHeartbeatHandler
extends org.apache.hadoop.yarn.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.yarn.service.Service

org.apache.hadoop.yarn.service.Service.STATE

Constructor Summary

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

Method Summary

void	init(org.apache.hadoop.conf.Configuration conf)
void	receivedPing(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)
void	register(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)
void	start()
void	stop()
void	unregister(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID)

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

getConfig, getName, getServiceState, getStartTime, register, unregister

Methods inherited from class java.lang.Object

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

Constructor Detail

TaskHeartbeatHandler

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

Method Detail

init

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

Specified by:

init in interface org.apache.hadoop.yarn.service.Service

Overrides:

init in class org.apache.hadoop.yarn.service.AbstractService

start

public void start()

Specified by:

start in interface org.apache.hadoop.yarn.service.Service

Overrides:

start in class org.apache.hadoop.yarn.service.AbstractService

stop

public void stop()

Specified by:

stop in interface org.apache.hadoop.yarn.service.Service

Overrides:

stop in class org.apache.hadoop.yarn.service.AbstractService

receivedPing

public void receivedPing(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)