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https://issues.apache.org/jira/browse/MAPREDUCE-5?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13194590#comment-13194590
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divya commented on MAPREDUCE-5:
-------------------------------
We get the above exception on a cluster set up and not on single node . Due to
this the performance of the map/reduce job goes down (from 1mins, 35sec to
4mins, 24sec ).
But one change in the exception the cause .
org.mortbay.jetty.EofException
Caused by: java.io.IOException: Connection reset by peer
at sun.nio.ch.FileDispatcher.write0(Native Method)
Does it happen due to connectivity issue among the nodes ?
> 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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