@Dhiraj I hope your just changing the ports here. Already rpc calls should be enabled on the cluster. If thats the case "Changing the service RPC port settings requires a restart of the NameNodes, DataNodes and ZooKeeper Failover Controllers to take full effect. If you have NameNode HA setup, you can restart the NameNodes one at a time followed by a rolling restart of the remaining components to avoid cluster downtime." Hope this helps you. ... View more