gistfile1.rb

after_fork do |server, worker|
  ##
  # Set the listening HTTP port for each of the workers dynamically

  port = 5000 + worker.nr

  begin
    server.listen("127.0.0.1:#{port}")
  rescue Errno::EADDRINUSE
    # we couldn't grab the port we want so just keep
    # trying until someone kills us
    sleep 3
    retry
  end
end