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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