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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5029) Token operations should not block read operations
Date Fri, 09 Aug 2013 23:16:49 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13735477#comment-13735477
] 

Hadoop QA commented on HDFS-5029:
---------------------------------

{color:green}+1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12597172/HDFS-5029.patch
  against trunk revision .

    {color:green}+1 @author{color}.  The patch does not contain any @author tags.

    {color:green}+1 tests included{color}.  The patch appears to include 1 new or modified
test files.

    {color:green}+1 javac{color}.  The applied patch does not increase the total number of
javac compiler warnings.

    {color:green}+1 javadoc{color}.  The javadoc tool did not generate any warning messages.

    {color:green}+1 eclipse:eclipse{color}.  The patch built with eclipse:eclipse.

    {color:green}+1 findbugs{color}.  The patch does not introduce any new Findbugs (version
1.3.9) warnings.

    {color:green}+1 release audit{color}.  The applied patch does not increase the total number
of release audit warnings.

    {color:green}+1 core tests{color}.  The patch passed unit tests in hadoop-hdfs-project/hadoop-hdfs.

    {color:green}+1 contrib tests{color}.  The patch passed contrib unit tests.

Test results: https://builds.apache.org/job/PreCommit-HDFS-Build/4796//testReport/
Console output: https://builds.apache.org/job/PreCommit-HDFS-Build/4796//console

This message is automatically generated.
                
> Token operations should not block read operations
> -------------------------------------------------
>
>                 Key: HDFS-5029
>                 URL: https://issues.apache.org/jira/browse/HDFS-5029
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>    Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
>            Reporter: Daryn Sharp
>            Assignee: Daryn Sharp
>         Attachments: HDFS-5029.branch-23.patch, HDFS-5029.patch, HDFS-5029.patch
>
>
> Token operations unnecessarily obtain the write lock on the namespace.  Edits for token
operations are independent of edits for other namespace write operations, and the edits have
no ordering requirement with respect to namespace changes.

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