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https://issues.apache.org/jira/browse/YARN-3087?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14351162#comment-14351162
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Li Lu commented on YARN-3087:
-----------------------------

Hi [~sjlee0]. Thanks for reminding me this. I just double checked that the UT 
still passes, so I think the server launching should be fine? I agree that the 
standalone mode should not be put to a file named as "AuxService". Maybe we can 
further change this in YARN-3033, where we actually make both modes visible, 
and provide the users better ways to config them? 

> [Aggregator implementation] the REST server (web server) for per-node 
> aggregator does not work if it runs inside node manager
> -----------------------------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-3087
>                 URL: https://issues.apache.org/jira/browse/YARN-3087
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: timelineserver
>            Reporter: Sangjin Lee
>            Assignee: Li Lu
>             Fix For: YARN-2928
>
>         Attachments: YARN-3087-022315.patch, YARN-3087-022515.patch, 
> YARN-3087-022615.patch
>
>
> This is related to YARN-3030. YARN-3030 sets up a per-node timeline 
> aggregator and the associated REST server. It runs fine as a standalone 
> process, but does not work if it runs inside the node manager due to possible 
> collisions of servlet mapping.
> Exception:
> {noformat}
> org.apache.hadoop.yarn.webapp.WebAppException: /v2/timeline: controller for 
> v2 not found
>       at org.apache.hadoop.yarn.webapp.Router.resolveDefault(Router.java:232)
>       at org.apache.hadoop.yarn.webapp.Router.resolve(Router.java:140)
>       at org.apache.hadoop.yarn.webapp.Dispatcher.service(Dispatcher.java:134)
>       at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
>       at 
> com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:263)
>       at 
> com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:178)
>       at 
> com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:91)
>       at 
> com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:62)
>       at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:900)
>       at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:834)
>       at 
> com.sun.jersey.spi.container.servlet.ServletContainer.doFilter(ServletContainer.java:795)
> ...
> {noformat}



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