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https://issues.apache.org/jira/browse/YARN-11515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17736645#comment-17736645
 ] 

ASF GitHub Bot commented on YARN-11515:
---------------------------------------

goiri commented on code in PR #5752:
URL: https://github.com/apache/hadoop/pull/5752#discussion_r1240548197


##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/DefaultClientRequestInterceptor.java:
##########
@@ -107,25 +109,25 @@
  */
 public class DefaultClientRequestInterceptor
     extends AbstractClientRequestInterceptor {
+  private static final Logger LOG =
+      LoggerFactory.getLogger(DefaultClientRequestInterceptor.class);
   private ApplicationClientProtocol clientRMProxy;
 
   @Override
   public void init(String userName) {
     super.init(userName);
-
-    final Configuration conf = this.getConf();
     try {
-      clientRMProxy =
-          user.doAs(new PrivilegedExceptionAction<ApplicationClientProtocol>() 
{
-            @Override
-            public ApplicationClientProtocol run() throws Exception {
-              return ClientRMProxy.createRMProxy(conf,
-                  ApplicationClientProtocol.class);
-            }
-          });
+      final Configuration conf = this.getConf();
+      clientRMProxy = user.doAs(
+          (PrivilegedExceptionAction<ApplicationClientProtocol>) () ->
+               ClientRMProxy.createRMProxy(conf, 
ApplicationClientProtocol.class));
     } catch (Exception e) {
-      throw new YarnRuntimeException(
-          "Unable to create the interface to reach the YarnRM", e);
+      String message = "Error while creating Router RMClient Service";

Review Comment:
   StringBuilder?





> [Federation] Improve DefaultRequestInterceptor#init Code
> --------------------------------------------------------
>
>                 Key: YARN-11515
>                 URL: https://issues.apache.org/jira/browse/YARN-11515
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: federation, router
>    Affects Versions: 3.4.0
>            Reporter: Shilun Fan
>            Assignee: Shilun Fan
>            Priority: Minor
>              Labels: pull-request-available
>
> If we do not enable Federation mode, the YARN Router can also act as a proxy 
> for the YARN ResourceManager. In this case, we can achieve this functionality 
> by configuring the DefaultRequestInterceptor.  While reading the code, I 
> found that the Init code could be improved. 



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