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https://issues.apache.org/jira/browse/HIVE-4638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13723510#comment-13723510
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Prasad Mujumdar commented on HIVE-4638:
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[~ashutoshc] my apologies for missing the comment earlier.
We found the issue in one of our internal integration tests with Cloudera
Manager. The exec hook retrieves the query start time
hookContext.getQueryPlan().getQueryStartTime()which sometimes used to return
bogus timestamp values. The problem didn't reproduce with the patch.
> Thread local PerfLog can get shared by multiple hiveserver2 sessions
> --------------------------------------------------------------------
>
> Key: HIVE-4638
> URL: https://issues.apache.org/jira/browse/HIVE-4638
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2, Query Processor
> Affects Versions: 0.11.0
> Reporter: Prasad Mujumdar
> Assignee: Prasad Mujumdar
> Fix For: 0.12.0
>
> Attachments: HIVE-4638-1.patch
>
>
> The PerfLog is accessed as thread local which can be shared by multiple
> hiveserver2 session, overwriting query runtime information.
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