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https://issues.apache.org/jira/browse/DRILL-3190?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14565369#comment-14565369
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Sudheesh Katkam commented on DRILL-3190:
----------------------------------------
Review board: https://reviews.apache.org/r/34829/
> 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
>
> Attachments: DRILL-3190.1.patch.txt
>
>
> 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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