Package org.apache.hadoop.mapreduce.v2.app

Interface TaskAttemptListener

All Known Implementing Classes:

TaskAttemptListenerImpl

public interface TaskAttemptListener

This class listens for changes to the state of a Task.

Method Summary

Modifier and Type	Method	Description
java.net.InetSocketAddress	getAddress()
void	registerLaunchedTask(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID, WrappedJvmID jvmID)	Register task attempt.
void	registerPendingTask(org.apache.hadoop.mapred.Task task, WrappedJvmID jvmID)	Register a JVM with the listener.
void	unregister(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID, WrappedJvmID jvmID)	Unregister the JVM and the attempt associated with it.

Method Detail

getAddress

java.net.InetSocketAddress getAddress()

registerPendingTask

void registerPendingTask(org.apache.hadoop.mapred.Task task,
                         WrappedJvmID jvmID)

Register a JVM with the listener. This should be called as soon as a JVM ID is assigned to a task attempt, before it has been launched.

Parameters:

task - the task itself for this JVM.

jvmID - The ID of the JVM .

registerLaunchedTask

void registerLaunchedTask(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID,
                          WrappedJvmID jvmID)

Register task attempt. This should be called when the JVM has been launched.

Parameters:

attemptID - the id of the attempt for this JVM.

jvmID - the ID of the JVM.

unregister

void unregister(org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId attemptID,
                WrappedJvmID jvmID)

Unregister the JVM and the attempt associated with it. This should be called when the attempt/JVM has finished executing and is being cleaned up.

Parameters:

attemptID - the ID of the attempt.

jvmID - the ID of the JVM for that attempt.