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Posted to mapreduce-dev@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2012/07/13 16:25:35 UTC

[jira] [Created] (MAPREDUCE-4437) Race in MR ApplicationMaster can cause reducers to never be scheduled

Jason Lowe created MAPREDUCE-4437:
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             Summary: Race in MR ApplicationMaster can cause reducers to never be scheduled
                 Key: MAPREDUCE-4437
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4437
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: applicationmaster, mrv2
    Affects Versions: 0.23.3, 2.0.1-alpha
            Reporter: Jason Lowe


If the MR AM is notified of container completion by the RM before the AM receives notification of the container cleanup from the NM then it can fail to schedule reducers indefinitely.  Logs showing the issue to follow.

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