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https://issues.apache.org/jira/browse/HADOOP-4631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12656251#action_12656251
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Sharad Agarwal commented on HADOOP-4631:
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The tests are passing on my linux machine with the patch. Also verified with 
pre-reverted Revision: 726075

The problem could be user hadoop-site.xml overriding the test properties. With 
this patch, src/test/hadoop-site.xml is *removed*  and respective properties 
are moved to core-site.xml, hdfs-site.xml and mapred-site.xml.
 
To overcome this problem, we can keep empty src/test/hadoop-site.xml so that it 
overrides the conf/hadoop-site.xml and user properties are not picked up while 
executing test cases.



> Split the default configurations into 3 parts
> ---------------------------------------------
>
>                 Key: HADOOP-4631
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4631
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: conf
>            Reporter: Owen O'Malley
>            Assignee: Sharad Agarwal
>             Fix For: 0.20.0
>
>         Attachments: 4631_v1.patch, 4631_v2.patch, 4631_v3.patch, 
> 4631_v4.patch, 4631_v5.patch, 4631_v6.patch
>
>
> We need to split hadoop-default.xml into core-default.xml, hdfs-default.xml 
> and mapreduce-default.xml. That will enable us to split the project into 3 
> parts that have the defaults distributed with each component.

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