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Posted to common-issues@hadoop.apache.org by "Hadoop QA (JIRA)" <ji...@apache.org> on 2015/05/03 00:48:06 UTC

[jira] [Commented] (HADOOP-10594) Improve Concurrency in Groups

    [ https://issues.apache.org/jira/browse/HADOOP-10594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14525535#comment-14525535 ] 

Hadoop QA commented on HADOOP-10594:
------------------------------------

(!) The patch artifact directory has been removed! 
This is a fatal error for test-patch.sh.  Aborting. 
Jenkins (node H3) information at https://builds.apache.org/job/PreCommit-HADOOP-Build/6430/ may provide some hints.

> 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
>         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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