# File lib/phusion_passenger/request_handler.rb, line 155
        def cleanup
                if @main_loop_thread
                        @main_loop_thread_lock.synchronize do
                                @graceful_termination_pipe[1].close rescue nil
                        end
                        @main_loop_thread.join
                end
                @server_sockets.each_value do |info|
                        socket = info[:socket]
                        type = get_socket_address_type(info[:address])

                        socket.close if !socket.closed?
                        if type == :unix
                                filename = info[:address].sub(/^unix:/, '')
                                File.unlink(filename) rescue nil
                        end
                end
                @owner_pipe.close rescue nil
        end