How do I remove a CLOSE_WAIT socket connection

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CLOSE_WAIT means your program is still running, and hasn’t closed the socket (and the kernel is waiting for it to do so). Add -p to netstat to get the pid, and then kill it more forcefully (with SIGKILL if needed). That should get rid of your CLOSE_WAIT sockets. You can also use ps to find the pid.

SO_REUSEADDR is for servers and TIME_WAIT sockets, so doesn’t apply here.

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