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From "Jason Lowe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9747) Reduce unnecessary UGI synchronization
Date Wed, 29 Jan 2014 20:22:19 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jason Lowe updated HADOOP-9747:
-------------------------------

    Target Version/s: 3.0.0, 0.23.11, 2.4.0  (was: 3.0.0, 0.23.11)

> 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
>            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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