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From "Allen Wittenauer (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-10594) Improve Concurrency in Groups
Date Wed, 06 May 2015 03:38:55 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-10594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Allen Wittenauer updated HADOOP-10594:
--------------------------------------
    Labels: BB2015-05-TBR  (was: )

> Improve Concurrency in Groups
> -----------------------------
>
>                 Key: HADOOP-10594
>                 URL: https://issues.apache.org/jira/browse/HADOOP-10594
>             Project: Hadoop Common
>          Issue Type: Sub-task
>            Reporter: Benoy Antony
>            Assignee: Benoy Antony
>              Labels: BB2015-05-TBR
>         Attachments: HADOOP-10594.patch
>
>
> The static field GROUPS in Groups can be accessed by holding a lock only.
> This object is effectively immutable after construction and hence can safely published
using a volatile field. This enables threads to access this GROUPS object without holding
lock



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