    # File lib/phusion_passenger/abstract_request_handler.rb, line 310
            def start_main_loop_thread
                    current_generation = @main_loop_generation
                    @main_loop_thread = Thread.new do
                            begin
                                    main_loop
                            rescue Exception => e
                                    print_exception(self.class, e)
                            end
                    end
                    @main_loop_thread_lock.synchronize do
                            while @main_loop_generation == current_generation
                                    @main_loop_thread_cond.wait(@main_loop_thread_lock)
                            end
                    end
            end