Tomcat Server Error - Port 8080 already in use

If you see the error "Port 8080 already in use" when starting the Tomcat server, it means that another process is already using port 8080 on your machine.

To solve this problem, you can either stop the process that is using port 8080 or change the port number used by the Tomcat server.

To stop the process that is using port 8080, you can use the lsof command to find the process ID (PID) of the process and then use the kill command to stop the process:

lsof -i :8080
kill -9 <PID>

Replace <PID> with the process ID of the process that is using port 8080.

To change the port number used by the Tomcat server, you can edit the server.xml file in the conf directory of the Tomcat installation and change the Connector element with the port attribute:

<Connector port="8081" protocol="HTTP/1.1" ... />

Replace 8081 with the desired port number.

I hope this helps. Let me know if you have any questions.