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https://issues.apache.org/jira/browse/HIVE-4239?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HIVE-4239:
-----------------------------------
    Attachment: HIVE-4239.patch

Made it specific to HS2 and configurable in case bugs are found.
The provided unit test passes; I also tried it with explain queries on HS2 on a 
cluster here, submitting from 5-20 threads (same explain), and it appears to 
work; I can also see logs showing compile is parallel, and corresponding 
increase in throughput

> 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
>            Assignee: Sergey Shelukhin
>         Attachments: HIVE-4239.patch
>
>




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