[jira] [Created] (HIVE-9976) Possible race condition in DynamicPartitionPruner for <200ms tasks

["Gopal V (JIRA)" <ji...@apache.org>]

Gopal V created HIVE-9976:
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             Summary: Possible race condition in DynamicPartitionPruner for <200ms tasks
                 Key: HIVE-9976
                 URL: https://issues.apache.org/jira/browse/HIVE-9976
             Project: Hive
          Issue Type: Bug
          Components: Tez
    Affects Versions: llap
            Reporter: Gopal V
            Assignee: Gunther Hagleitner


Race condition in the DynamicPartitionPruner between DynamicPartitionPruner::processVertex() and DynamicPartitionpruner::addEvent() for tasks which respond with both the result and success in a single heartbeat sequence.

{code}
2015-03-16 07:05:01,589 ERROR [InputInitializer [Map 1] #0] tez.DynamicPartitionPruner: Expecting: 1, received: 0
2015-03-16 07:05:01,590 ERROR [Dispatcher thread: Central] impl.VertexImpl: Vertex Input: store_sales initializer failed, vertex=vertex_1424502260528_1113_4_04 [Map 1]
org.apache.tez.dag.app.dag.impl.AMUserCodeException: org.apache.hadoop.hive.ql.metadata.HiveException: Incorrect event count in dynamic parition pruning
{code}

All 4 upstream vertices of Map 1 need to finish within ~200ms to trigger this, which seems to be happening with LLAP.



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