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https://issues.apache.org/jira/browse/HIVE-14739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15488409#comment-15488409
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Siddharth Seth commented on HIVE-14739:
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+1
> Replace runnables directly added to runtime shutdown hooks to avoid deadlock
> ----------------------------------------------------------------------------
>
> Key: HIVE-14739
> URL: https://issues.apache.org/jira/browse/HIVE-14739
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.2.0
> Reporter: Deepesh Khandelwal
> Assignee: Prasanth Jayachandran
> Attachments: HIVE-14739.1.patch, HIVE-14739.2.patch,
> HIVE-14739.3.patch
>
>
> [~deepesh] reported that a deadlock can occur when running queries through
> hive cli. [~cnauroth] analyzed it and reported that hive adds shutdown hooks
> directly to java Runtime which may execute in non-deterministic order causing
> deadlocks with hadoop's shutdown hooks. In one case, hadoop shutdown locked
> FileSystem#Cache and FileSystem.close whereas hive shutdown hook locked
> FileSystem.close and FileSystem#Cache order causing a deadlock.
> Hive and Hadoop has ShutdownHookManager that runs the shutdown hooks in
> deterministic order based on priority. We should use that to avoid deadlock
> throughout the code.
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