Hello,I downloaded the sample app from https://github.com/akka/akka-samples/tree/2.5/akka-sample-cluster-scala . i can run this sample without a problem because it inserts each port 2551 , 2552 into the configuration on the actor system.
But when i remove these ports and run the app. It fails with the error
Remote connection to [null] failed with java.net.ConnectException: Connection refused: /127.0.0.1:2552
Remote connection to [null] failed with java.net.ConnectException: Connection refused: /127.0.0.1:2551
Why does this have to fail ? what is the correct way to start the server with seed nodes from application.conf . I have attached the screenshot