Nodetool status gives the below error.
nodetool: Failed to connect to '127.0.0.1:7199' - ConnectException: 'Connection refused (Connection refused)'.
Have followed the instructions step by step
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Unable to see the status of nodes after setting up DS210 on AWS
You didn't provide the specific unit and exercise in DS210 that you followed so I don't which instructions and which stage you're in.
The only thing I can tell you is that you are probably connecting to a node that is not listening for JMX connections on localhost and/or port 7199. Otherwise, DSE probably didn't start on the node which is why you can't connect to it.
You should check the system.log of the node for clues on whether it started up successfully or not. If you are convinced that DSE is running, you can check which IP and ports the DSE process is listening on by running one of the following commands:
$ netstat -tnlp
$ sudo lsof -nPi -sTCP:LISTEN
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