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https://issues.apache.org/jira/browse/HIVE-12777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15114338#comment-15114338
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Xuefu Zhang commented on HIVE-12777:
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Thanks for the explanation. Hive session has a large state. Once a session is
opened, its state can be changed, such as configuration, delegation token, temp
functions, added jars, etc. However, the implementation here is only restore
the session handle (basically an identifier). Thus, I'm in serious doubt of its
usefulness. Clearly, restoreSession() should mean more than just that.
> Add capability to restore session in CLIService and SessionManager
> ------------------------------------------------------------------
>
> Key: HIVE-12777
> URL: https://issues.apache.org/jira/browse/HIVE-12777
> Project: Hive
> Issue Type: Improvement
> Reporter: Rajat Khandelwal
> Assignee: Rajat Khandelwal
> Attachments: HIVE-12777.04.patch, HIVE-12777.08.patch,
> HIVE-12777.09.patch, HIVE-12777.11.patch, HIVE-12777.12.patch,
> HIVE-12777.13.patch, HIVE-12777.15.patch, HIVE-12777.16.patch,
> HIVE-12777.17.patch
>
>
> Extensions using CLIService session handles should be able to restore the
> session from the handle.
> Apache Lens depends on a fork of hive and that fork has such a capability.
> Functionality added: Restoring a session. A session opened once is lost once
> the cli service is re-created. There may be some operation going on in that
> session at the time the service is restarted. It's useful to be able to
> restore a previously existing session.
> Have added code in CLIService for that effect. Have also added a test class.
> Relevant commit:
> https://github.com/InMobi/hive/commit/931fe9116161a18952c082c14223ad6745fefe00#diff-0acb35f7cab7492f522b0c40ce3ce1be
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