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From "Doug Cutting (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-313) A stand alone driver for individual tasks
Date Mon, 10 Jul 2006 11:22:31 GMT
    [ http://issues.apache.org/jira/browse/HADOOP-313?page=comments#action_12420028 ] 

Doug Cutting commented on HADOOP-313:

This looks good, except I think you forgot to add IsolationRunner.java.

> A stand alone driver for individual tasks
> -----------------------------------------
>          Key: HADOOP-313
>          URL: http://issues.apache.org/jira/browse/HADOOP-313
>      Project: Hadoop
>         Type: Bug

>     Reporter: Michel Tourn
>     Assignee: Michel Tourn
>  Attachments: sareduce.patch, stand-alone-task.patch
> This is a tool to reproduce problems and to run unit tests involving either a map or
reduce task.
> You just give it a reduce directory on the command line.
> Usage: java org.apache.hadoop.mapred.StandaloneReduceTask <taskdir> [<limitmaps>]
> taskdir name encodes: task_<jobid>_r_<partition>_<attempt>
> taskdir contains job.xml and one or more input files named: map_<dddd>.out
> You should run with the same -Xmx option as the TaskTracker child JVM

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