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From "Lefty Leverenz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-14799) Query operation are not thread safe during its cancellation
Date Sun, 16 Oct 2016 01:55:22 GMT

    [ https://issues.apache.org/jira/browse/HIVE-14799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15579106#comment-15579106
] 

Lefty Leverenz commented on HIVE-14799:
---------------------------------------

[~ctang.ma] since you've committed this to master, please update the status and fix version.
 Thanks.

Commit 1901e3a6ab97c150905c04c591b33b2c640e4b87.

> Query operation are not thread safe during its cancellation
> -----------------------------------------------------------
>
>                 Key: HIVE-14799
>                 URL: https://issues.apache.org/jira/browse/HIVE-14799
>             Project: Hive
>          Issue Type: Bug
>          Components: HiveServer2
>            Reporter: Chaoyu Tang
>            Assignee: Chaoyu Tang
>         Attachments: HIVE-14799.1.patch, HIVE-14799.2.patch, HIVE-14799.3.patch, HIVE-14799.4.patch,
HIVE-14799.5.patch, HIVE-14799.5.patch, HIVE-14799.6.patch, HIVE-14799.6.patch, HIVE-14799.7.patch,
HIVE-14799.patch
>
>
> When a query is cancelled either via Beeline (Ctrl-C) or API call TCLIService.Client.CancelOperation,
SQLOperation.cancel is invoked in a different thread from that running the query to close/destroy
its encapsulated Driver object. Both SQLOperation and Driver are not thread-safe which could
sometimes result in Runtime exceptions like NPE. The errors from the running query are not
handled properly therefore probably causing some stuffs (files, locks etc) not being cleaned
after the query termination.



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