Jason Lowe created MAPREDUCE-4842:
-------------------------------------
Summary: Shuffle race can hang reducer
Key: MAPREDUCE-4842
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4842
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: mrv2
Affects Versions: 0.23.5, 2.0.3-alpha
Reporter: Jason Lowe
Saw an instance where the shuffle caused multiple reducers in a job to hang.
It looked similar to the problem described in MAPREDUCE-3721, where the
fetchers were all being told to WAIT by the MergeManager but no merge was
taking place.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
