I'm trying to build a very simple service using Vapor. It depends on websockets, and I establish a connection between an iOS device in simulator and vapor running on localhost.
When I want to make changes to the server, I restart and sometimes get [ ERROR ] bind(descriptor:ptr:bytes:): Address already in use (errno: 48)
I don't know how to find and kill this process, which is a socket running on 8080. I have to restart to get out of it, and I feel like throwing the computer out the window after a few repetitions (question about that already asked in mentalHealthOverflow.com).
How can I find and kill this process? Stopping the simulator device doesn't do it.
The fix is actually pretty easy. Go to your terminal and run lsof -i :<port>, so in your case, lsof -i :8080. You will get an output of all the processes that are running on that port.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Run 48904 calebkleveter 31u IPv4 0x97c38af35a1b4785 0t0 TCP localhost:Run (LISTEN)
You can then run the kill command, passing in the PID from the output you got:
kill 48904
You can now run your Vapor service.