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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-9747) Reduce unnecessary UGI synchronization
Date Thu, 18 Jul 2013 17:38:51 GMT
Daryn Sharp created HADOOP-9747:
-----------------------------------

             Summary: 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: 2.0.0-alpha, 0.23.0, 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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