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https://issues.apache.org/jira/browse/HIVE-20737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16650474#comment-16650474
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Denys Kuzmenko commented on HIVE-20737:
---------------------------------------

[~stakiar] could you please review the patch. As the separate JIRA we are 
planning to refactor SparkSession open/submit functionality to be an atomic 
unit.

> SparkContext is shared between user sessions and should be closed only when 
> there is no active one
> --------------------------------------------------------------------------------------------------
>
>                 Key: HIVE-20737
>                 URL: https://issues.apache.org/jira/browse/HIVE-20737
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: Denys Kuzmenko
>            Assignee: Denys Kuzmenko
>            Priority: Major
>         Attachments: HIVE-20737.1.patch, HIVE-20737.2.patch, 
> HIVE-20737.5.patch, HIVE-20737.6.patch, HIVE-20737.7.patch
>
>
> 1. SparkContext is shared between user sessions and should be closed only 
> when there is no active one. 
> 2. Possible race condition in SparkSession.open() in case of user queries run 
> in parallel within a single session.



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