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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4299) Terasort hangs with MR2 FifoScheduler
Date Wed, 11 Jul 2012 04:46:35 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13411231#comment-13411231
] 

Hadoop QA commented on MAPREDUCE-4299:
--------------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12535965/MAPREDUCE-4299.patch
  against trunk revision .

    -1 patch.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2570//console

This message is automatically generated.
                
> Terasort hangs with MR2 FifoScheduler
> -------------------------------------
>
>                 Key: MAPREDUCE-4299
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4299
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.0.0-alpha
>            Reporter: Tom White
>            Assignee: Tom White
>         Attachments: MAPREDUCE-4299.patch
>
>
> What happens is that the number of reducers ramp up until they occupy all of the job's
containers, at which point the maps no longer make any progress and the job hangs.
> When the same job is run with the CapacityScheduler it succeeds, so this looks like a
FifoScheduler bug.

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