HDFS-16411 RBF: RouterId is NULL when set dfs.federation.router.rpc.enable=false; checkstyle

Author: yulongz

hadoop-hdfs-project/hadoop-hdfs-rbf/src/main/java/org/apache/hadoop/hdfs/server/federation/router/Router.java

@@ -430,12 +430,6 @@ public RouterRpcServer getRpcServer() {
   protected void setRpcServerAddress(InetSocketAddress address) {
     this.rpcAddress = address;
 
-    try {
-      InetAddress.getLocalHost();
-    } catch (UnknownHostException e) {
-      e.printStackTrace();
-    }
-
     // Use the RPC address as our unique router Id
     if (this.rpcAddress != null) {
       try {