Package org.apache.hadoop.mapred

Class TaskCompletionEvent

java.lang.Object

org.apache.hadoop.mapreduce.TaskCompletionEvent

org.apache.hadoop.mapred.TaskCompletionEvent

All Implemented Interfaces:

Writable

@Public
@Stable
public class TaskCompletionEvent
extends TaskCompletionEvent

This is used to track task completion events on job tracker.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	TaskCompletionEvent.Status

Field Summary

Fields

Modifier and Type	Field	Description
static final TaskCompletionEvent[]	EMPTY_ARRAY

Constructor Summary

Constructors

Constructor	Description
TaskCompletionEvent()	Default constructor for Writable.
TaskCompletionEvent(int eventId, TaskAttemptID taskId, int idWithinJob, boolean isMap, TaskCompletionEvent.Status status, String taskTrackerHttp)	Constructor. eventId should be created externally and incremented per event for each job.

Method Summary

Modifier and Type	Method	Description
static TaskCompletionEvent	downgrade(TaskCompletionEvent event)
TaskAttemptID	getTaskAttemptId()	Returns task id.
String	getTaskId()	Deprecated. use getTaskAttemptId() instead.
TaskCompletionEvent.Status	getTaskStatus()	Returns TaskCompletionEvent.Status
void	setEventId(int eventId)	set event Id. should be assigned incrementally starting from 0.
protected void	setTaskAttemptId(TaskAttemptID taskId)	Sets task id.
void	setTaskId(String taskId)	Deprecated. use setTaskAttemptId(TaskAttemptID) instead.
void	setTaskID(TaskAttemptID taskId)	Deprecated. use setTaskAttemptId(TaskAttemptID) instead.
void	setTaskRunTime(int taskCompletionTime)	Set the task completion time
void	setTaskStatus(TaskCompletionEvent.Status status)	Set task status.
void	setTaskTrackerHttp(String taskTrackerHttp)	Set task tracker http location.

Methods inherited from class org.apache.hadoop.mapreduce.TaskCompletionEvent

equals, getEventId, getStatus, getTaskRunTime, getTaskTrackerHttp, hashCode, idWithinJob, isMapTask, readFields, setTaskAttemptId, setTaskStatus, toString, write

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

EMPTY_ARRAY

public static final TaskCompletionEvent[] EMPTY_ARRAY

Constructor Details

TaskCompletionEvent

public TaskCompletionEvent()

Default constructor for Writable.

TaskCompletionEvent

public TaskCompletionEvent(int eventId,
 TaskAttemptID taskId,
 int idWithinJob,
 boolean isMap,
 TaskCompletionEvent.Status status,
 String taskTrackerHttp)

Constructor. eventId should be created externally and incremented per event for each job.

Parameters:

eventId - event id, event id should be unique and assigned in incrementally, starting from 0.

taskId - task id

status - task's status

taskTrackerHttp - task tracker's host:port for http.

Method Details

downgrade

@Private
public static TaskCompletionEvent downgrade(TaskCompletionEvent event)

getTaskId

@Deprecated
public String getTaskId()

Deprecated.

use getTaskAttemptId() instead.

Returns task id.

Returns:

task id

getTaskAttemptId

public TaskAttemptID getTaskAttemptId()

Returns task id.

Overrides:

getTaskAttemptId in class TaskCompletionEvent

Returns:

task id

getTaskStatus

public TaskCompletionEvent.Status getTaskStatus()

Returns TaskCompletionEvent.Status

Returns:

task completion status

setTaskId

@Deprecated
public void setTaskId(String taskId)

Deprecated.

use setTaskAttemptId(TaskAttemptID) instead.

Sets task id.

Parameters:

taskId -

setTaskID

@Deprecated
public void setTaskID(TaskAttemptID taskId)

Deprecated.

use setTaskAttemptId(TaskAttemptID) instead.

Sets task id.

Parameters:

taskId -

setTaskAttemptId

protected void setTaskAttemptId(TaskAttemptID taskId)

Sets task id.

Parameters:

taskId -

setTaskStatus

@Private
public void setTaskStatus(TaskCompletionEvent.Status status)

Set task status.

Parameters:

status -

setTaskRunTime

@Private
public void setTaskRunTime(int taskCompletionTime)

Set the task completion time

Overrides:

setTaskRunTime in class TaskCompletionEvent

Parameters:

taskCompletionTime - time (in millisec) the task took to complete

setEventId

@Private
public void setEventId(int eventId)

set event Id. should be assigned incrementally starting from 0.

Overrides:

setEventId in class TaskCompletionEvent

Parameters:

eventId -

setTaskTrackerHttp

@Private
public void setTaskTrackerHttp(String taskTrackerHttp)

Set task tracker http location.

Overrides:

setTaskTrackerHttp in class TaskCompletionEvent

Parameters:

taskTrackerHttp -