port 8080 is already in use and no process using 8080 has been listed

Question

I am trying to start Tomcat from Eclipse, but a problem occured:

Port 8080 required by Tomcat v6.0 Server at localhost is already in use. The server may already be running in another process, or a system process may be using the port. To start this server you will need to stop the other process or change the port number(s).

I tried to list processes connected to this port using command on Windows:

netstat -aon 

But on the listing there is no process with PID = 8080. I also tried:

netstat -aon | find "8080" 

But it also didn't find anything. Can anyone help me?

Answer 1

PID is the process ID - not the port number. You need to look for an entry with ":8080" at the end of the address/port part (the second column). Then you can look at the PID and use Task Manager to work out which process is involved... or run netstat -abn which will show the process names (but must be run under an administrator account).

Having said that, I would expect the find "8080" to find it...

Another thing to do is just visit http://localhost:8080 - on that port, chances are it's a web server of some description.