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From "Prasanth Jayachandran (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-16546) LLAP: Fail map join tasks if hash table memory exceeds threshold
Date Thu, 27 Apr 2017 02:00:09 GMT
Prasanth Jayachandran created HIVE-16546:
--------------------------------------------

             Summary: LLAP: Fail map join tasks if hash table memory exceeds threshold
                 Key: HIVE-16546
                 URL: https://issues.apache.org/jira/browse/HIVE-16546
             Project: Hive
          Issue Type: Bug
          Components: llap
    Affects Versions: 3.0.0
            Reporter: Prasanth Jayachandran
            Assignee: Prasanth Jayachandran


When map join task is running in llap, it can potentially use lot more memory than its limit
which could be memory per executor or no conditional task size. If it uses more memory, it
can adversely affect other query performance or it can even bring down the daemon. In such
cases, it is better to fail the query than to bring down the daemon. 



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