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From "Bharat Viswanadham (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9747) Reduce unnecessary UGI synchronization
Date Tue, 09 Jan 2018 00:47:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16317438#comment-16317438
] 

Bharat Viswanadham commented on HADOOP-9747:
--------------------------------------------

Uploaded patch v02 to address the review comments. 
Thank You [~daryn] for intial patch. I think, you are busy with other tasks, I have addressed
the review comments and uploaded the patch.
As we need this patch to go in asap, uploaded the patch to address the review comments.

Could you please review these changes.






> Reduce unnecessary UGI synchronization
> --------------------------------------
>
>                 Key: HADOOP-9747
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9747
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: security
>    Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0-alpha1
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HADOOP-9747-trunk.01.patch, HADOOP-9747-trunk.02.patch, HADOOP-9747.2.branch-2.patch,
HADOOP-9747.2.trunk.patch, HADOOP-9747.branch-2.patch, HADOOP-9747.trunk.patch
>
>
> Jstacks of heavily loaded NNs show up to dozens of threads blocking in the UGI.



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