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Posted to mapreduce-issues@hadoop.apache.org by "Harsh J (JIRA)" <ji...@apache.org> on 2012/05/30 09:52:24 UTC
[jira] [Commented] (MAPREDUCE-4292) Job is hanging forever when
some maps are failing always
[ https://issues.apache.org/jira/browse/MAPREDUCE-4292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285476#comment-13285476 ]
Harsh J commented on MAPREDUCE-4292:
------------------------------------
What exactly was the failed map's cause? Did the job not fail after 4x map fails? (Note: Reducers may fail and retrigger maps if they can't get its outputs in good time.)
Logs of the MR AM would be good to have.
> Job is hanging forever when some maps are failing always
> --------------------------------------------------------
>
> Key: MAPREDUCE-4292
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4292
> Project: Hadoop Map/Reduce
> Issue Type: Bug
> Components: mrv2
> Affects Versions: 2.0.0-alpha
> Reporter: Nishan Shetty
> Priority: Critical
>
> Set property "mapred.reduce.tasks" to some value greater than zero
> I have a job in which some maps are failing always.
> Observations:
> 1.Map phase is completing with 100%(with succeeded and failed maps).
> 2.Reduce phase is not progressing further after 32%.
> 3.After map phase is completed job is hanging forever.
> Expected that job should be failed after waiting for some time.
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