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

28
votes

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?

4
javaeclipsetomcat
You may have accidentially launched Tomcat twice. Only the first one can use the port. Others are denied in the way you see. – Thorbjørn Ravn Andersen

4 Answers

35
votes

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.

5
votes

Open eclipse go to Servers panel, right click or press F3 to open Overview window and go to Ports (Modify the server ports). You will get the following:

tomcat adminport
HTTP/1.1
AJP/1.3

You can change the port numbers (e.g. HTTP/1.1 port number 8080 to 8082).

3
votes

In windows " wmic process where processid="pid of the process running" get commandline " worked for me. The culprit was wrapper.exe process of webhuddle jboss soft.

1
votes

If no other process is using the port 8080, Eventhough eclipse shows the port 8080 is used while starting the server in eclipse, first you have to stop the server by hitting the stop button in "Configure Tomcat"(which you can find in your start menu under tomcat folder), then try to start the server in eclipse then it will be started.

If any other process is using the port 8080 and as well as you no need to disturb it. then you can change the port.