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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-13858) LLAP: A preempted task can end up waiting on completeInitialization if some part of the executing code suppressed the interrupt
Date Thu, 26 May 2016 01:42:12 GMT
Siddharth Seth created HIVE-13858:
-------------------------------------

             Summary: LLAP: A preempted task can end up waiting on completeInitialization
if some part of the executing code suppressed the interrupt
                 Key: HIVE-13858
                 URL: https://issues.apache.org/jira/browse/HIVE-13858
             Project: Hive
          Issue Type: Bug
            Reporter: Siddharth Seth
            Assignee: Siddharth Seth
            Priority: Critical


An interrupt along with a HiveProcessor.abort call is made when attempting to preempt a task.

In this specific case, the task was in the middle of HDFS IO - which 'handled' the interrupt
by retrying. As a result the interrupt status on the thread was reset - so instead of skipping
the future.get in completeInitialization - the task ended up blocking there.

End result - a single executor slot permanently blocked in LLAP. Depending on what else is
running - this can cause a cluster level deadlock.



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