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https://issues.apache.org/jira/browse/HIVE-12528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15053984#comment-15053984
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Sergey Shelukhin commented on HIVE-12528:
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Well patch fails with an NPE because SessionState is not attached on new
threads. It's used in exactly one place so I think I will just remove its usage
from TezSessionState init.
> don't start HS2 Tez sessions in a single thread
> -----------------------------------------------
>
> Key: HIVE-12528
> URL: https://issues.apache.org/jira/browse/HIVE-12528
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-12528.patch
>
>
> Starting sessions in parallel would improve the startup time.
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