I have started flink in cluster mode.   ..flink1.4.2/bin/$
./start-cluster.sh (no config changes ie., default settings)
And trying to connect to it,
ExecutionEnvironment.createRemoteEnvironment("localhost", 6123, "xxx.jar");

I am not seeing any response, did not find anything in jobmanager log.
Please guide how to trace the issue. Or Do we need any preconfiguration?
In local environment everything works fine.

Using : flink-1.4.2-bin-scala_2.11.tgz

Thanks in advance.