GlassFish v3 Domain Server cannot start. Port is occupied

Question

I imagine this is a pretty generic error. I cant seem to find any documentation on it.

I am simply attempting to run a java web project with jsp\'s and beans... using n

Answer 1

I was just encountering this issue. What I did was open my browser, pointed to localhost:8080. It looked like I already had an instance of Glassfish running.

So I then went to localhost:4949 (Glassfish server administration page) clicked on 'server (Admin Server)' in the left pane, then pressed the 'Stop' button.

I tried to deploy the J2EE application once again, this time successfully.