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https://issues.apache.org/jira/browse/HADOOP-4631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12655964#action_12655964
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Hemanth Yamijala commented on HADOOP-4631:
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bq. supported backward compatibility. If hadoop-site.xml is found in classpath 
it is loaded, emitting a warning.

To give some time (read - past this release) for clients like HOD which may be 
reasonably impacted by this change, can we avoid this warning from becoming too 
verbose ? That is, instead of printing it everytime a configuration object is 
loaded, can we emit it only once ?

> 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
>
>
> 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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