hadoop-mapreduce-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-5) Shuffle's getMapOutput() fails with EofException, followed by IllegalStateException
Date Tue, 06 Apr 2010 23:56:34 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12854266#action_12854266
] 

Allen Wittenauer commented on MAPREDUCE-5:
------------------------------------------

If these messages are harmful, then we need to give a better message.

If these messages aren't harmful, then we shouldn't be throwing a java exception.

FWIW, we see these all the time at LinkedIn.

> 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.

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message