How do I find (and kill) processes that listen to/use my TCP ports? I’m on macOS.
Sometimes, after a crash or some bug, my Rails app is locking port 3000. I can’t find it using
Address already in use - bind(2) (Errno::EADDRINUSE)
The same issue happens when stopping Node.js process. Even after the process is stopped and the app stops running, port
3000 is locked. When starting the app again, getting
Address already in use (Errno::EADDRINUSE)