[jira] [Updated] (HIVE-20547) HS2: support Tez sessions started by someone else (part 1)

["Sergey Shelukhin (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-20547?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Shelukhin updated HIVE-20547:
------------------------------------
    Attachment: HIVE-20547.patch

> 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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