Ssh into the instance and check the port that is causing issues:
netstat -pan | grep ":4503 "
You should get exact pid of the process and status:
In this case the program is still busy in CLOSE_WAIT.
CLOSE_WAIT means your program is still running, and has not closed the socket.
You can get the java pid number and kill the program to clear the socket.
Message of the Day - Edit the below file and add your message here.
vi /etc/motd
If Not working you can check that under sshd_config PrintMotd is set to yes
cat /etc/ssh/sshd_config | grep Print
PrintMotd yes
Next time you login to the instance, you get the defined welcome message:
