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From "Bharat Viswanadham (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HADOOP-9747) Reduce unnecessary UGI synchronization
Date Wed, 22 Nov 2017 01:08:01 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16261795#comment-16261795
] 

Bharat Viswanadham edited comment on HADOOP-9747 at 11/22/17 1:07 AM:
----------------------------------------------------------------------

Proceeded with code changes on top of [~daryn] patch.
[~daryn]
Uploaded a new patch v01 to address review comments.





was (Author: bharatviswa):
[~daryn]
Uploaded a new patch v01 to address review comments.




> 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-9747.2.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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