I had an error when I tried to open "Control Center" and open the log file directory, I always got this error. It will go away if I reboot the server but will come back after some time.
java.rmi.ConnectException: Connection refused to host: <IP of CRA server>
java.net.ConnectException: Connection refused: connect
This is a 2-server cluster and all other operation works fine. But sometimes, the "accept" step in the script doesn't work. If I used a script that works and modify it then it will work. But if you create a new script, it seems "accept" step doesn't work and I will hear "System problem" message.
Also, I suspect because of the Java error I got, I can't debug from the editor, it always tries to debug from the standby server, not the primary.