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Date: Thu, 15 Nov 2012 18:06:12 +0000 (UTC)
From: "Hadoop QA (JIRA)" <jira@apache.org>
To: common-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HADOOP-9045) In nodegroup-aware case, make sure
 nodes are avoided to place replica if some replica are already under the
 same nodegroup
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    [ https://issues.apache.org/jira/browse/HADOOP-9045?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13498180#comment-13498180 ] 

Hadoop QA commented on HADOOP-9045:
-----------------------------------

{color:red}-1 overall{color}.  Here are the results of testing the latest attachment 
  http://issues.apache.org/jira/secure/attachment/12553662/HADOOP-9045.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:red}-1 findbugs{color}.  The patch appears to introduce 1 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:red}-1 core tests{color}.  The patch failed these unit tests in hadoop-hdfs-project/hadoop-hdfs:

                  org.apache.hadoop.hdfs.TestHDFSFileSystemContract

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

Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/1751//testReport/
Findbugs warnings: https://builds.apache.org/job/PreCommit-HADOOP-Build/1751//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-hdfs.html
Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/1751//console

This message is automatically generated.
                
> In nodegroup-aware case, make sure nodes are avoided to place replica if some replica are already under the same nodegroup
> --------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HADOOP-9045
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9045
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 2.0.2-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: HADOOP-9045.patch
>
>
> In previous implementation for HADOOP-8468, 3rd replica is avoid to place on the same nodegroup of 2nd replica. But it didn't provide check on nodegroup of 1st replica, so if 2nd replica's rack is not efficient to place replica, then it is possible to place 3rd and 1st replica within the same node group. We need a change to remove all nodes from available nodes for placing replica if there already replica on the same nodegroup.

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