goiri commented on code in PR #5766:
URL: https://github.com/apache/hadoop/pull/5766#discussion_r1240546837


##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-client/src/test/java/org/apache/hadoop/yarn/client/cli/TestRouterCLI.java:
##########
@@ -120,7 +122,10 @@ public void testDeregisterSubCluster() throws Exception {
     ByteArrayOutputStream dataOut = new ByteArrayOutputStream();
     System.setOut(new PrintStream(dataOut));
     oldOutPrintStream.println(dataOut);
-    String[] args = {"-deregisterSubCluster", "-c", "SC-1"};
+    String[] args = {"-deregisterSubCluster", "-sc", "SC-1"};

Review Comment:
   It is weird to have a single dash for two letters.
   It should be `--sc`, no?



##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/rmadmin/FederationRMAdminInterceptor.java:
##########
@@ -879,9 +879,11 @@ private DeregisterSubClusters deregisterSubCluster(String 
reqSubClusterId) {
       SubClusterState subClusterState = subClusterInfo.getState();
       long lastHeartBeat = subClusterInfo.getLastHeartBeat();
       Date lastHeartBeatDate = new Date(lastHeartBeat);
-
+      String heartBeatTimeOut =

Review Comment:
   Don't we use somewhere else other than the log message?



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