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From "Junping Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9747) Reduce unnecessary UGI synchronization
Date Tue, 01 Aug 2017 20:27:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16109695#comment-16109695
] 

Junping Du commented on HADOOP-9747:
------------------------------------

2.8.2 is not supposed to have big and risky feature/improvements. [~daryn], I will move this
to 2.9.0 if you are ok with.

> 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-9747.2.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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