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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-13415) Decouple Sessions from thrift binary transport
Date Sat, 16 Apr 2016 08:29:25 GMT

    [ https://issues.apache.org/jira/browse/HIVE-13415?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15244090#comment-15244090
] 

Lefty Leverenz commented on HIVE-13415:
---------------------------------------

Doc note:  Added a TODOC2.1 label so that *hive.server2.close.session.on.disconnect* will
be documented in the HiveServer2 section of Configuration Properties for the 2.1.0 release.
 (If more explanation is needed, it should go in Setting Up HiveServer2.)

* [Configuration Properties -- HiveServer2 | https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-HiveServer2]
* [Setting Up HiveServer2 | https://cwiki.apache.org/confluence/display/Hive/Setting+Up+HiveServer2]

> Decouple Sessions from thrift binary transport
> ----------------------------------------------
>
>                 Key: HIVE-13415
>                 URL: https://issues.apache.org/jira/browse/HIVE-13415
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>    Affects Versions: 1.2.0
>            Reporter: Rajat Khandelwal
>            Assignee: Rajat Khandelwal
>              Labels: TODOC2.1
>             Fix For: 2.1.0
>
>         Attachments: HIVE-13415.01.patch, HIVE-13415.04.patch, HIVE-13415.05.patch
>
>
> Current behaviour is:
> * Open a thrift binary transport
> * create a session
> * close the transport
> Then the session gets closed. Consequently, all the operations running in the session
also get killed.
> Whereas, if you open an HTTP transport, and close, the enclosing sessions are not closed.

> This seems like a bad design, having transport and sessions tightly coupled. I'd like
to fix this. 
> The issue that introduced it is [HIVE-9601|https://github.com/apache/hive/commit/48bea00c48853459af64b4ca9bfdc3e821c4ed82]
Relevant discussions at [here|https://issues.apache.org/jira/browse/HIVE-11485?focusedCommentId=15223546&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15223546],
[here|https://issues.apache.org/jira/browse/HIVE-11485?focusedCommentId=15223827&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15223827]
and mentioned links on those comments. 
> Another thing that seems like a slightly bad design is this line of code in ThriftBinaryCLIService:
> {noformat}
> server.setServerEventHandler(serverEventHandler);
> {noformat}
> Whereas serverEventHandler is defined by the base class, with no users except one sub-class(ThriftBinaryCLIService),
violating the separation of concerns. 



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