I am using RAD 7.5.0 and the websphere server v6.1. When i start the server in debug mode, it displays a error message states that
'Starting WebSphere application server in localhost; has encountered a problem. JVM debug port #### is in use.
What is the problem? How to resolve this?
It simply means that the debug port is currently in use. Do you have any other IBM products already running on that box? Does this happen when you start your server for the first time or for subsequent tries?
One suggestion would be to hunt down rogue hanging Java processes and kill them (in case you don't need them) to resolve this.