org.apache.hadoop.mapred
Class IsolationRunner

java.lang.Object
  org.apache.hadoop.mapred.IsolationRunner

public class IsolationRunner
extends Object

IsolationRunner is intended to facilitate debugging by re-running a specific task, given left-over task files for a (typically failed) past job. Currently, it is limited to re-running map tasks. Users may coerce MapReduce to keep task files around by setting keep.failed.task.files. See mapred_tutorial.xml for more documentation.

Constructor Summary

IsolationRunner()

Method Summary

static void

main(String[] args) Run a single task.

Methods inherited from class java.lang.Object

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

Constructor Detail

IsolationRunner

public IsolationRunner()

Method Detail

main

public static void main(String[] args)
                 throws ClassNotFoundException,
                        IOException,
                        InterruptedException

Run a single task.

Parameters:

args - the first argument is the task directory

Throws:

ClassNotFoundException

IOException

InterruptedException