Then open the task manager to view-> Select column-> Check PID (process identifier)-> of course
Find the PID process in the task manager, check what program occupies the port, and close it! ! ! Ask, but the process shown in 4896 is that there is no response to debugging after tomcat6 is closed.
Tomcat is already running in another process. Open it again and it will repeat. Did you run other server programs and start the comcat process ~