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https://issues.apache.org/jira/browse/HIVE-26104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17518180#comment-17518180
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Stamatis Zampetakis commented on HIVE-26104:
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[~liuyan] Can you clarify if we are talking about queries in the same session
or different sessions?
> HIVE-19138 May block queries to compile
> ---------------------------------------
>
> Key: HIVE-26104
> URL: https://issues.apache.org/jira/browse/HIVE-26104
> Project: Hive
> Issue Type: Bug
> Components: CBO
> Affects Versions: 3.0.0, 3.1.2
> Reporter: liuyan
> Priority: Critical
>
> HIVE-19138 introduce a way to allow other queries to stay in compilation
> state while there are placeholder for the same query in result cache.
> However, multiple queires may enter the same state and hence used all the
> avaliable parallel compilation limit via
> hive.driver.parallel.compilation.global.limit. Althought we can turn off
> this feature by setting hive.query.results.cache.wait.for.pending.results =
> false, but seems this negelects all the efforts that Hive-19138 trying to
> reslove. We need a better solution for such situation
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