How do I resolve the "java.net.BindException: Address already in use: JVM_Bind" error?

If you know what port the process is running you can type: lsof -i:<port>.

For instance, lsof -i:8080, to list the process (pid) running on port 8080.

Then kill the process with kill <pid>

Yes you have another process bound to the same port.

TCPView (Windows only) from Windows Sysinternals is my favorite app whenever I have a JVM_BIND error. It shows which processes are listening on which port. It also provides a convenient context menu to either kill the process or close the connection that is getting in the way.

In windows

netstat -ano

will list all the protocols, ports and processes listening . Use

taskkill -pid "proces to kill" /f

to kill the process listening to the port. e.g

 taskkill -pid 431 /f

In Ubuntu/Unix we can resolve this problem in 2 steps as described below.

1. Type netstat -plten |grep java

   This will give an output similar to:

   tcp   0   0 0.0.0.0:8080   0.0.0.0:*  LISTEN   1001  76084  9488/java       
   

   Here 8080 is the port number at which the java process is listening and 9488 is its process id (pid).

2. In order to free the occupied port, we have to kill this process using the kill command.

   kill -9 9488
   

   9488 is the process id from earlier. We use -9 to force stop the process.

Your port should now be free and you can restart the server.