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https://issues.apache.org/jira/browse/HADOOP-4944?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12666697#action_12666697
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Rama, Ramasamy commented on HADOOP-4944:
----------------------------------------

That was the original idea, but xerces currently doesn’t support xpointer() 
scheme (http://xerces.apache.org/xerces2-j/faq-xinclude.html#faq-8) and got the 
following error:


hadoop5224.snc1.facebook.com: [Warning] hadoop-site.xml:9:147: 
SchemeUnsupported: The XPointer scheme 'xpointer' is not supported.
..
2009-01-23 12:28:49,678 FATAL org.apache.hadoop.conf.Configuration: error 
parsing conf file: org.xml.sax.SAXParseException: An 'include' failed, and no 
'fallback' element was found.
2009-01-23 12:28:49,679 ERROR org.apache.hadoop.mapred.TaskTracker: Can not 
start task tracker because java.lang.RuntimeException: 
org.xml.sax.SAXParseException: An 'include' failed, and no 'fallback' element 
was found.
        at 
org.apache.hadoop.conf.Configuration.loadResource(Configuration.java:912)




> Allow Xinclude in hadoop config file
> ------------------------------------
>
>                 Key: HADOOP-4944
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4944
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: conf
>            Reporter: Rama, Ramasamy
>            Assignee: Rama, Ramasamy
>            Priority: Minor
>             Fix For: 0.20.0
>
>         Attachments: configInclude2.patch, includes_in_conf.diff.txt
>
>
> It would be easier to mange the configuration of hadoop by allowing include 
> files in configuration file (file: hadoop-site.xml)

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