ROR + A server is already running. Check …/tmp/pids/server.pid. Exiting

Question

In my Rails Project, I am trying to run two different servers at different port. But it fails by giving this error at console.

C:\\Rails>rails s
=> Boo         


        

Answer 1

Every instance of a RoR server creates a PID file. By default it is

#{Rails.root}/tmp/pids/server.pid

and if that file already exists it will refuse to start a new server.

To run more than one server of the same project on the same machine you should manually specify the PID file name for each instance of the server (I recommend simply appending a hyphen and the port number) using the -P option:

rails s -p 1234 -P tmp/pids/server-1234.pid

I'm told in some cases you may need to supply a full (rather than relative) path, but I don't know what those cases are.