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From "Sudheesh Katkam (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-3190) Invalid FragmentState transition from CANCELLATION_REQUESTED in QueryManager
Date Tue, 26 May 2015 22:01:17 GMT
Sudheesh Katkam created DRILL-3190:
--------------------------------------

             Summary: Invalid FragmentState transition from CANCELLATION_REQUESTED in QueryManager
                 Key: DRILL-3190
                 URL: https://issues.apache.org/jira/browse/DRILL-3190
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Flow
            Reporter: Sudheesh Katkam
            Assignee: Sudheesh Katkam
             Fix For: 1.1.0


If a fragment is cancelled as soon as it starts running, there are two state change messages
that are reported to the QueryManager: transition to RUNNING and transition to CANCELLATION_REQUESTED.


The order of receiving these messages is not guaranteed because the messages *can be* reported
from different threads. The QueryManager#FragmentStateListener does not check for a transition
from CANCELLATION_REQUESTED to RUNNING. This state change should not happen in FragmentData#setStatus.



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