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https://issues.apache.org/jira/browse/HIVE-21646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16845483#comment-16845483
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Gopal V commented on HIVE-21646:
--------------------------------
Both failures look like timeouts of different kinds and flaky.
> Tez: Prevent TezTasks from escaping thread logging context
> ----------------------------------------------------------
>
> Key: HIVE-21646
> URL: https://issues.apache.org/jira/browse/HIVE-21646
> Project: Hive
> Issue Type: Bug
> Components: Tez
> Reporter: Gopal V
> Assignee: Gopal V
> Priority: Major
> Attachments: HIVE-21646.1.patch, HIVE-21646.1.patch
>
>
> If hive.exec.parallel is set to true to parallelize MoveTasks or StatsTasks,
> the Tez task does not benefit from a new thread and will lose all the thread
> context of the current query.
> Multiple threads even if they are spawned, will lock on SyncDagClient & make
> progress sequentially.
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