好，我找到了解决方法...我将启动rails的方式更改为:

Ok I found a fix... I changed how I start rails to:

mongrel_rails start -d

，现在将执行以下操作:

and now the following action will do it:

def restart
  fork { exec "mongrel_rails restart" }
  redirect_to "/server_maintenance"
end

作为警告，redirect_to将导致失败的加载，因为服务器将关闭.但是暂停后重新加载将显示重新启动成功.可以通过更改重新启动以使用AJAX完成，然后重新加载javascript来解决此问题，但是我将其作为练习留给读者.

As a caveat, the redirect_to will cause a failed load because the server will be down... however a reload after a pause will show that the restart was successful. This could be fixed by changing the restart to be done with AJAX, followed by a javascript reload... but I will leave that as an exercise to the reader.