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Posted to issues@tez.apache.org by "Jason Lowe (JIRA)" <ji...@apache.org> on 2016/02/11 16:20:18 UTC

[jira] [Created] (TEZ-3114) Shuffle OOM due to EventMetaData flood

Jason Lowe created TEZ-3114:
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             Summary: Shuffle OOM due to EventMetaData flood
                 Key: TEZ-3114
                 URL: https://issues.apache.org/jira/browse/TEZ-3114
             Project: Apache Tez
          Issue Type: Bug
    Affects Versions: 0.7.0
            Reporter: Jason Lowe


A task encountered an OOM during shuffle, and investigation of the heap dump showed a lot of memory being consumed by almost 3.5 million EventMetaData objects.  Auto-parallelism had reduced the number of tasks in the vertex to 1 and there were 2000 upstream tasks to shuffle.



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