org.apache.hadoop.mapred
Class IsolationRunner

java.lang.Object
  extended by 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


Copyright © 2009 The Apache Software Foundation