问题
After starting a http a couple of times I get this error like an instance of Go has not stopped!?
listen tcp :9000: bind: address already in use
I have experienced something like this with nodejs too but I was able to kill the process.. Unfortunately it seems like I can't find the process id and kill it..
How to "free" the tcp port?
回答1:
If you are on unix like system you can use netstat to find out which process is listening on a port:
sudo netstat -nlp | grep 9000
Turns out the -p option is not available on OS X. If you are using OS X you can do this:
lsof -n -i4TCP:$PORT | grep LISTEN
Who is listening on a given TCP port on Mac OS X?
来源：https://stackoverflow.com/questions/29636472/how-to-find-process-using-tcp-port