slfan1989 commented on code in PR #5056:
URL: https://github.com/apache/hadoop/pull/5056#discussion_r1045952641


##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/FederationInterceptorREST.java:
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@@ -2105,9 +2115,10 @@ private <R> Map<SubClusterInfo, R> 
invokeConcurrent(Collection<SubClusterInfo> c
         if (response != null) {
           results.put(clusterId, response);
         }
-
-        Exception exception = pair.getRight();
-        if (exception != null) {

Review Comment:
   Thank you very much for your suggestion, I agree with you, I will modify the 
code.



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