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https://issues.apache.org/jira/browse/TAJO-1020?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14112140#comment-14112140
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ASF GitHub Bot commented on TAJO-1020:
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Github user babokim commented on the pull request:
https://github.com/apache/tajo/pull/127#issuecomment-53555888
+1
Thanks your contribution, it looks good overall.
I've tested on the real cluster and All tasks run successfully.
> TajoContainerProxy::assignExecutionBlock causes NPE by race condition.
> ----------------------------------------------------------------------
>
> Key: TAJO-1020
> URL: https://issues.apache.org/jira/browse/TAJO-1020
> Project: Tajo
> Issue Type: Bug
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Priority: Critical
> Fix For: 0.9.0
>
>
> When some classes using KeyValueSet is being used for a concurrent manner.
> The member variable 'builder' in KeyValueSet causes race condition. As a
> result, builder can cause NPE.
> This is an urgent issue. Please review it as soon as possible.
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