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https://issues.apache.org/jira/browse/YARN-11238?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17607670#comment-17607670
 ] 

ASF GitHub Bot commented on YARN-11238:
---------------------------------------

slfan1989 commented on code in PR #4904:
URL: https://github.com/apache/hadoop/pull/4904#discussion_r976338577


##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/clientrm/FederationClientInterceptor.java:
##########
@@ -773,24 +761,19 @@ public GetClusterNodesResponse 
getClusterNodes(GetClusterNodesRequest request)
       RouterServerUtil.logAndThrowException("Missing getClusterNodes 
request.", null);
     }
     long startTime = clock.getTime();
-    Map<SubClusterId, SubClusterInfo> subClusters =
-        federationFacade.getSubClusters(true);
-    Map<SubClusterId, GetClusterNodesResponse> clusterNodes = 
Maps.newHashMap();
-    for (SubClusterId subClusterId : subClusters.keySet()) {
-      ApplicationClientProtocol client;
-      try {
-        client = getClientRMProxyForSubCluster(subClusterId);
-        GetClusterNodesResponse response = client.getClusterNodes(request);
-        clusterNodes.put(subClusterId, response);
-      } catch (Exception ex) {
-        routerMetrics.incrClusterNodesFailedRetrieved();
-        RouterServerUtil.logAndThrowException("Unable to get cluster nodes due 
to exception.", ex);
-      }
+    ClientMethod remoteMethod = new ClientMethod("getClusterNodes",
+        new Class[]{GetClusterNodesRequest.class}, new Object[]{request});
+    Collection<GetClusterNodesResponse> clusterNodes = null;
+    try {
+      clusterNodes = invokeConcurrent(remoteMethod, 
GetClusterNodesResponse.class);

Review Comment:
   I will refactor the code.





> Optimizing FederationClientInterceptor Call with Parallelism
> ------------------------------------------------------------
>
>                 Key: YARN-11238
>                 URL: https://issues.apache.org/jira/browse/YARN-11238
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: federation
>    Affects Versions: 3.4.0, 3.3.4
>            Reporter: fanshilun
>            Assignee: fanshilun
>            Priority: Major
>              Labels: pull-request-available
>




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