EventMachine: “`start_tcp_server’: no acceptor (port is in use or requires root privileges)”

Had the same problem.

Ran lsof -i :3000 (3000 is the port I ran it on).

I found out that the port was being used by ruby. I killed the process using kill -9 *pid*.

When I ran lsof -i :3000 again, nothing showed up.

I then ran rails s and everything works fine now.

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