#1 Check what processes are running at available ports
$ netstat -ao |find /i "listening"
#2 Stop process running at your port number(In this case it is 8080 & Process Id is 12704)
$ Taskkill /F /IM 12704
https://stackoverflow.com/questions/40118878/8080-port-already-taken-issue-when-trying-to-redeploy-project-from-spring-tool-s