Why doesn't mongrel start in Rails 3.2.rc?

问题

GEMFILE that starts mongrel

gem 'rails', '3.1.0'
gem 'mongrel', '>=1.2.0.pre2'

GEMFILE that start WEBrick (not mongrel)

gem 'rails', '3.2.0.rc2'
gem 'mongrel', '>=1.2.0.pre2'

回答1:

Starting on Rails 3.2 you must specify the server you want to use, otherwise Webrick will be used.

So, to use mongrel, you must place the gem at your Gemfile AND start the server like this:

$ rails s mongrel

来源：https://stackoverflow.com/questions/8853338/why-doesnt-mongrel-start-in-rails-3-2-rc