커맨드 창을 열어서
> netstat -aon | find "9000"
TCP 0.0.0.0:9000 0.0.0.0:0 LISTENING 5836
TCP [::]:9000 [::]:0 LISTENING 5836
> taskkill /F /PID 5836
https://stackoverflow.com/questions/38986910/intellij-idea-address-localhost1099-is-already-in-use