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https://issues.apache.org/jira/browse/TAJO-1113?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14168525#comment-14168525
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ASF GitHub Bot commented on TAJO-1113:
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Github user hyunsik commented on the pull request:
https://github.com/apache/tajo/pull/199#issuecomment-58773588
Thanks!
> SubQuery in KILLED state should handle unexpected events.
> ---------------------------------------------------------
>
> Key: TAJO-1113
> URL: https://issues.apache.org/jira/browse/TAJO-1113
> Project: Tajo
> Issue Type: Bug
> Components: query master
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Priority: Blocker
> Fix For: 0.9.0
>
>
> Currently, {{KILLED}} state in SubQuery does not handle any event. As I
> mentioned in TAJO-1111, {{QueryUnit}} in even terminal states may receive
> additional unexpected events from a running tasks because a running task
> reporter sends a progress periodically; that is the report is not
> synchronized with a task life cycle. As a result, When a killed {{QueryUnit}}
> receives unexpected events, it can cause some event towards {{SubQuery}}.
> But, {{SubQuery}} does not handle any addition events if {{SubQuery}} is
> already in {{KILLED}}.
> This patch adds some transitions to SubQuery in order to fix the above
> problem.
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