[Error] Port 80 required by Tomcat v9.0 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

 

✅ 상황
→ 서버 실행시 발생

✅ 오류
→ Port 80 required by Tomcat v9.0 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).

✅ 문제원인

→ 80 포트 번호가 이미 사용 중

✅ 해결방법
→ 포트 죽이기

터미널 열기

lsof -i :80 치면

COMMAND    PID  USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME  뜨는데

 

kill -9 PID뜬번호 입력

 

서버 재실행