I released rails-asyncweb 0.1. http://rails-asyncweb.sourceforge.net/ rails-asyncweb is a fast web server for JRuby on Rails. It implementated as a custom AsyncWeb HttpService, so you can get running rails app under high-perfomance, non blocking java HTTP engine. If you have any questions, patches, or comments, please feel free to feedback. 日本語 rails-asyncweb 0.1をリリースしました。 http://rails-asyncweb.