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From "Sangjin Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-9747) Reduce unnecessary UGI synchronization
Date Thu, 12 May 2016 22:27:13 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15282176#comment-15282176
] 

Sangjin Lee commented on HADOOP-9747:
-------------------------------------

There has been no movement on this for a while. We'll need to move it out of scope for 2.8.0
soon. Let me know if you disagree.

> 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
>
> Jstacks of heavily loaded NNs show up to dozens of threads blocking in the UGI.



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