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From "Luke Lu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-2863) Support web-services for RM & NM
Date Tue, 23 Aug 2011 20:46:28 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-2863?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089741#comment-13089741
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Luke Lu commented on MAPREDUCE-2863:
------------------------------------

GPL is explicitly disallowed by http://apache.org/legal/resolved.html, CDDL 1.0 is weakly
allowed (binary only). Not sure about CDDL 1.1.

OTOH, there is no need to introduce Jersey as a dependency in this case, as RM and NM is powered
by a more powerful framework with Apache 2.0 license with integrated hadoop pluggable authentication
support :)

For example adding an echo web service in RM would be just a one-liner in RmController.java:

{code}
public void echoJSON() { renderJSON($("echo")); }
{code}

which will echo "foo" as application/json with the URL http://rm-host:port/yarn/apps/echojson?echo=foo.

> 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: Milind Bhandarkar
>
> It will be very useful for RM and NM to support web-services to export json/xml.

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