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https://issues.apache.org/jira/browse/HIVE-18153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Shelukhin updated HIVE-18153:
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Attachment: HIVE-18153.01.patch
> refactor reopen and file management in TezTask
> ----------------------------------------------
>
> Key: HIVE-18153
> URL: https://issues.apache.org/jira/browse/HIVE-18153
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-18153.01.patch, HIVE-18153.patch
>
>
> TezTask reopen relies on getting the same session object in terms of setup;
> WM reopen returns a new session from the pool.
> The former has the advantage of not having to reupload files and stuff... but
> the object reuse results in a lot of ugly code, and also reopen might be
> slower on average with the session pool than just getting a session from the
> pool. Either WM needs to do the object-preserving reopen, or TezTask needs to
> be refactored. It looks like DAG would have to be rebuilt to do the latter
> because of some paths tied to a directory of the old session. Let me see if I
> can get around that; if not we can do the former; and then if the former
> results in too much ugly code in WM to account for object reuse for different
> Tez client I'd do the latter anyway since it's a failure path :)
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