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From "Daryn Sharp (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9748) Reduce blocking on UGI.ensureInitialized
Date Thu, 18 Jul 2013 18:00:53 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daryn Sharp updated HADOOP-9748:
--------------------------------

    Attachment: HADOOP-9748.patch

Minor change.  This helps reduce unnecessary class lock contention between such common methods
as {{UGI#getGroupNames}} and {{UGI.getCurrentUser}}, etc.
                
> Reduce blocking on UGI.ensureInitialized
> ----------------------------------------
>
>                 Key: HADOOP-9748
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9748
>             Project: Hadoop Common
>          Issue Type: Sub-task
>          Components: security
>    Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>            Priority: Critical
>         Attachments: HADOOP-9748.patch
>
>
> EnsureInitialized is always sync'ed on the class, when it should only sync if it actually
has to initialize.

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