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Posted to dev@hive.apache.org by "liuyan (Jira)" <ji...@apache.org> on 2022/03/31 16:16:00 UTC

[jira] [Created] (HIVE-26104) HIVE-19138 May block queries to compile

liuyan created HIVE-26104:
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             Summary: 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: 3.1.2, 3.0.0
            Reporter: liuyan


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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