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https://issues.apache.org/jira/browse/MAPREDUCE-2863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13126680#comment-13126680
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Robert Joseph Evans commented on MAPREDUCE-2863:
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One thing to point out about JERSEY and Jackson is that if we use JAXB 
annotations in the classes that we read/write we cat get JSON/XML support 
seamlessly for free.  It may not be that critical if we only want to support 
JSON, but it is very convenient if we want to support multiple types.
                
> Support web-services for RM & NM
> --------------------------------
>
>                 Key: MAPREDUCE-2863
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2863
>             Project: Hadoop Map/Reduce
>          Issue Type: Improvement
>          Components: mrv2, nodemanager, resourcemanager
>            Reporter: Arun C Murthy
>            Assignee: Thomas Graves
>
> It will be very useful for RM and NM to support web-services to export 
> json/xml.

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