我试图在Ubuntu 14.04上安装Unicorn + Nginx。 每当该网站被访问（通过本地主机：8080或通过Nginx）它只是返回一个空白的500错误。 错误日志给了我以下内容：
NameError: uninitialized constant Rack::Lint::REQUEST_METHOD /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/lint.rb:298:in `check_env' /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/lint.rb:43:in `_call' /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/lint.rb:37:in `call' /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/showexceptions.rb:24:in `call' /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/commonlogger.rb:33:in `call' /var/lib/gems/1.9.1/gems/sinatra-1.4.6/lib/sinatra/base.rb:218:in `call' /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/chunked.rb:54:in `call' /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/content_length.rb:15:in `call' /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:580:in `process_client' /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:660:in `worker_loop' /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:527:in `spawn_missing_workers' /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:153:in `start' /usr/bin/unicorn:126:in `<main>' E, [2015-04-11T11:20:00.945818 #25817] ERROR -- : app error: uninitialized constant Rack::Request::SCRIPT_NAME (NameError) E, [2015-04-11T11:20:00.945882 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/request.rb:21:in `script_name' E, [2015-04-11T11:20:00.945904 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/showexceptions.rb:69:in `pretty' E, [2015-04-11T11:20:00.945926 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/showexceptions.rb:33:in `rescue in call' E, [2015-04-11T11:20:00.945946 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/showexceptions.rb:24:in `call' E, [2015-04-11T11:20:00.945964 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/commonlogger.rb:33:in `call' E, [2015-04-11T11:20:00.945984 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/sinatra-1.4.6/lib/sinatra/base.rb:218:in `call' E, [2015-04-11T11:20:00.946001 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/chunked.rb:54:in `call' E, [2015-04-11T11:20:00.946018 #25817] ERROR -- : /var/lib/gems/1.9.1/gems/rack-1.6.0/lib/rack/content_length.rb:15:in `call' E, [2015-04-11T11:20:00.946034 #25817] ERROR -- : /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:580:in `process_client' E, [2015-04-11T11:20:00.946056 #25817] ERROR -- : /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:660:in `worker_loop' E, [2015-04-11T11:20:00.946073 #25817] ERROR -- : /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:527:in `spawn_missing_workers' E, [2015-04-11T11:20:00.946095 #25817] ERROR -- : /usr/lib/ruby/vendor_ruby/unicorn/http_server.rb:153:in `start' E, [2015-04-11T11:20:00.946114 #25817] ERROR -- : /usr/bin/unicorn:126:in `<main>' 有任何想法吗？
这似乎是安装独angular兽的系统版本以及gem版本的问题。 要解决我刚刚做的
apt-get remove unicorn gem install unicorn
之后，问题就消失了