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https://issues.apache.org/jira/browse/HIVE-20547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin reassigned HIVE-20547:
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> HS2: support Tez sessions started by someone else (part 1)
> ----------------------------------------------------------
>
> Key: HIVE-20547
> URL: https://issues.apache.org/jira/browse/HIVE-20547
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Major
> Attachments: HIVE-20547.patch
>
>
> The registry/configs/some code is based on a private patch by [~prasanth_j].
> The patch refactors tez pool session to use composition instead of
> implementation inheritance from TezSessionState, to allow for two
> implementations of TezSessionState.
> For now it's blocked on getClient API in Tez that will be available after
> 0.9.3 release; however I commented out that path to check that refactoring
> passes tests.
> When 0.9.3 becomes available, we can uncomment and commit.
> In part 2, we may add some tests, and also consider other changes that are
> required for external sessions (e.g. KillQuery, where we cannot assume YARN
> is present).
> We may also consider a WM change that allows for proportional session
> distribution when the number of external sessions and the number of
> admin-specified sessions doesn't match, or at least some validation to see
> that the external sessions are available when applying a RP.
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