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From "Richard Lee (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4191) Expose ApplicationMaster RPC port in ResourceManager REST endpoint
Date Mon, 21 Sep 2015 14:33:04 GMT

    [ https://issues.apache.org/jira/browse/YARN-4191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14900749#comment-14900749
] 

Richard Lee commented on YARN-4191:
-----------------------------------

AFAICT, looking at the yarn source code, the RM doesn't actually serialize the ApplicationReport.
It gets a lot of similar information about the ApplicationMaster and returns it on the REST
/apps endpoint. One thing that seems to be missing is the RPC port, tho.  In particular, I'm
interested in working with the Samza Application Master. It has both a trackingUrl port and
an RPC port.  The REST stuff is on the RPC port at / (with, oddly no version path or anything,
which seems not the best practice).  Compare this to the Map Reduce ApplicationMaster, where
the REST api is on the same port as the trackingUrl at /ws/v1/mapreduce. 

I was not aware of the other RM REST issues. However, at present, I've only been doing GET
requests to retrieve information about the running cluster, and not yet trying to control
it.

> Expose ApplicationMaster RPC port in ResourceManager REST endpoint
> ------------------------------------------------------------------
>
>                 Key: YARN-4191
>                 URL: https://issues.apache.org/jira/browse/YARN-4191
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: resourcemanager
>    Affects Versions: 2.7.1
>            Reporter: Richard Lee
>            Priority: Minor
>
> Currently, the ResourceManager REST endpoint returns only the trackingUrl for the ApplicationMaster.
 Some AMs, however, have their REST endpoints on the RPC port.  However, the RM does not expose
the AM RPC port via REST for some reason.



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