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From "Jason Dere (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19892) Disable query results cache for for HiveServer2 doAs=true
Date Fri, 15 Jun 2018 00:19:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16513167#comment-16513167
] 

Jason Dere commented on HIVE-19892:
-----------------------------------

So the cache lookup has exception handling, but if Hive for some reason cannot access or read
the cached query directory, we can't really go back to the non-cached path, we already exited
query compilation once the cache lookup found a usable cache entry.
Possibly the only option we would have for a failure here would be to invoke whatever mechanism
is used for the ReExecDriver, to re-run the query without using the cache.

> Disable query results cache for for HiveServer2 doAs=true
> ---------------------------------------------------------
>
>                 Key: HIVE-19892
>                 URL: https://issues.apache.org/jira/browse/HIVE-19892
>             Project: Hive
>          Issue Type: Sub-task
>            Reporter: Jason Dere
>            Assignee: Jason Dere
>            Priority: Major
>             Fix For: 3.1.0
>
>         Attachments: HIVE-19892.1.patch
>
>
> If running HS2 with doAs=true, the temp query results directory will have ownership/permissions
based on the doAs user. A subsequent query running as a different user may not be able to
access this query results directory. Results caching will have to be disabled in this case.



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