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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Updated: (MAPREDUCE-5) Shuffle's getMapOutput() fails with EofException, followed by IllegalStateException
Date Tue, 06 Apr 2010 23:54:33 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-5?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer updated MAPREDUCE-5:
-------------------------------------

    Affects Version/s: 0.20.2

> Shuffle's getMapOutput() fails with EofException, followed by IllegalStateException
> -----------------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>    Affects Versions: 0.20.2
>         Environment: Sun Java 1.6.0_13, OpenSolaris, running on a SunFire 4150 (x64)
10 node cluster
>            Reporter: George Porter
>
> During the shuffle phase, I'm seeing a large sequence of the following actions:
> 1) WARN org.apache.hadoop.mapred.TaskTracker: getMapOutput(attempt_200905181452_0002_m_000010_0,0)
failed : org.mortbay.jetty.EofException
> 2) WARN org.mortbay.log: Committed before 410 getMapOutput(attempt_200905181452_0002_m_000010_0,0)
failed : org.mortbay.jetty.EofException
> 3) ERROR org.mortbay.log: /mapOutput java.lang.IllegalStateException: Committed
> The map phase completes with 100%, and then the reduce phase crawls along with the above
errors in each of the TaskTracker logs.  None of the tasktrackers get lost.  When I run non-data
jobs like the 'pi' test from the example jar, everything works fine.

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