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https://issues.apache.org/jira/browse/YARN-10389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17174941#comment-17174941
 ] 

Prabhu Joseph edited comment on YARN-10389 at 8/10/20, 5:32 PM:
----------------------------------------------------------------

[~tanu.ajmera] Thanks for the patch. The patch looks good. One minor issue 
which is not related to this patch.

1. The below null check is not required 

{code}
 bindExternalClasses();
 if (rm != null)
{code}

rm gets accessed even before the null check from bindExternalClasses, so no use 
having the null check.

{code}
  private void bindExternalClasses() {
    YarnConfiguration yarnConf = new YarnConfiguration(rm.getConfig());
{code}




was (Author: prabhu joseph):
[~tanu.ajmera] Thanks for the patch. The patch looks good. One minor issue 
which is not related to this patch.

1. The below null check is not required 

{code}
 bindExternalClasses();
 if (rm != null)
{code}

rm gets accessed even before the null check from bindExternalClasses, so no use 
having the null check.

{code}
  private void bindExternalClasses() {
    YarnConfiguration yarnConf = new YarnConfiguration(rm.getConfig());
{codE}



> Option to override RMWebServices with custom WebService class
> -------------------------------------------------------------
>
>                 Key: YARN-10389
>                 URL: https://issues.apache.org/jira/browse/YARN-10389
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 3.4.0
>            Reporter: Prabhu Joseph
>            Assignee: Tanu Ajmera
>            Priority: Major
>         Attachments: YARN-10389-001.patch, YARN-10389-002.patch, 
> YARN-10389-003.patch, YARN-10389-004.patch, YARN-10389-005.patch, 
> YARN-10389-006.patch, YARN-10389-007.patch
>
>
> YARN-8047 provides support to add custom WebServices as part of RMWebApp.  
> Since each WebService has to have a separate WebService Path, /ws/v1/cluster 
> root path cannot be used globally.
> Another alternative is to provide an option to override the RMWebServices 
> with custom WebServices implementation which can extend the RMWebService, 
> this way /ws/v1/cluster path can be used globally.



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