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https://issues.apache.org/jira/browse/HIVE-4239?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13615900#comment-13615900
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Carl Steinbach commented on HIVE-4239:
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Code was added in HIVE-2935 that serializes access to the compilation stage.
This was done because it looked like the compiler was not thread safe. We
should fix these concurrency problems if they still exist and remove this lock.
> Remove lock on compilation stage
> --------------------------------
>
> Key: HIVE-4239
> URL: https://issues.apache.org/jira/browse/HIVE-4239
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2, Query Processor
> Reporter: Carl Steinbach
>
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