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https://issues.apache.org/jira/browse/HIVE-24467?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17242067#comment-17242067
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guojh commented on HIVE-24467:
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[HIVE-21638|https://issues.apache.org/jira/browse/HIVE-21638]
> ConditionalTask remove tasks that not selected exists thread safety problem
> ---------------------------------------------------------------------------
>
> Key: HIVE-24467
> URL: https://issues.apache.org/jira/browse/HIVE-24467
> Project: Hive
> Issue Type: Bug
> Components: Hive
> Affects Versions: 2.3.4
> Reporter: guojh
> Priority: Major
>
> When hive execute jobs in parallel(control by “hive.exec.parallel”
> parameter), ConditionalTasks remove the tasks that not selected in parallel,
> because there are thread safety issues, some task may not remove from the
> dependent task tree. This is a very serious bug, which causes some stage task
> not trigger execution.
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