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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