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Posted to mapreduce-issues@hadoop.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2013/02/06 20:27:15 UTC

[jira] [Created] (MAPREDUCE-4982) AM hung with one pending map task

Jason Lowe created MAPREDUCE-4982:
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             Summary: AM hung with one pending map task
                 Key: MAPREDUCE-4982
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4982
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: mr-am
    Affects Versions: 2.0.3-alpha, 0.23.6
            Reporter: Jason Lowe


Saw a job that hung with one pending map task that never ran.  The task was in the SCHEDULED state with a single attempt that was in the UNASSIGNED state.  The AM looked like it was waiting for a container from the RM, but the RM was never granting it the one container it needed.

I suspect the AM botched the container request bookkeeping somehow.  More details to follow.

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