l@-MBP ~ % lsof -i tcp:9200
COMMAND   PID       USER   FD   TYPE             DEVICE SIZE/OFF NODE NAME
java    30266 langjunnan  346u  IPv6 0xabca34c88ea6bd43      0t0  TCP *:wap-wsp (LISTEN)
l@-MBP ~ % kill -9 30266
l@-MBP ~ % lsof -i tcp:9200