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https://issues.apache.org/jira/browse/HDFS-1043?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12846734#action_12846734
 ] 

Hadoop QA commented on HDFS-1043:
---------------------------------

-1 overall.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12439103/UGCRefresh.patch
  against trunk revision 923467.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 3 new or modified tests.

    +1 javadoc.  The javadoc tool did not generate any warning messages.

    +1 javac.  The applied patch does not increase the total number of javac 
compiler warnings.

    +1 findbugs.  The patch does not introduce any new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of 
release audit warnings.

    -1 core tests.  The patch failed core unit tests.

    -1 contrib tests.  The patch failed contrib unit tests.

Test results: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h2.grid.sp2.yahoo.net/131/testReport/
Findbugs warnings: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h2.grid.sp2.yahoo.net/131/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h2.grid.sp2.yahoo.net/131/artifact/trunk/build/test/checkstyle-errors.html
Console output: 
http://hudson.zones.apache.org/hudson/job/Hdfs-Patch-h2.grid.sp2.yahoo.net/131/console

This message is automatically generated.

> Benchmark overhead of server-side group resolution of users
> -----------------------------------------------------------
>
>                 Key: HDFS-1043
>                 URL: https://issues.apache.org/jira/browse/HDFS-1043
>             Project: Hadoop HDFS
>          Issue Type: Test
>    Affects Versions: 0.22.0
>            Reporter: Konstantin Shvachko
>            Assignee: Konstantin Shvachko
>             Fix For: 0.22.0
>
>         Attachments: UGCRefresh.patch
>
>
> Server-side user group resolution was introduced in HADOOP-4656. 
> The benchmark should repeatedly request the name-node for user group 
> resolution, and reset NN's user group cache periodically.

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