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사용중인 포트 확인필요 -> 포트를 죽이세요.

$ lost -I :포트번호
COMMAND   PID       USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    24496 xxx   6u  IPv6 xxxx     0t0  TCP *:http-alt (LISTEN)

$ kill -9 PID (PID는 24496)

 

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