当我加载localhost时，Rails服务器出错：3000
所以，我已开始在rails上学习ruby，我使用以下命令创建一个ROR项目：
rails new blog 接下来我编写以下命令来运行rails服务器：
rails s
Rails服务器运行，我在Web浏览器中加载localhost:3000 ; 但我在网络浏览器上得到500 internal error 。
日志文件有以下错误：
ArgumentError (wrong number of arguments (2 for 1)): actionpack (4.2.2) lib/action_dispatch/http/request.rb:338:in `parse_query' rack (1.6.3) lib/rack/request.rb:191:in `GET' actionpack (4.2.2) lib/action_dispatch/http/request.rb:300:in `GET' actionpack (4.2.2) lib/action_dispatch/http/parameters.rb:14:in `parameters' actionpack (4.2.2) lib/action_dispatch/http/filter_parameters.rb:37:in `filtered_parameters' actionpack (4.2.2) lib/action_controller/metal/instrumentation.rb:22:in `process_action' actionpack (4.2.2) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' activerecord (4.2.2) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (4.2.2) lib/abstract_controller/base.rb:137:in `process' actionview (4.2.2) lib/action_view/rendering.rb:30:in `process' actionpack (4.2.2) lib/action_controller/metal.rb:196:in `dispatch' actionpack (4.2.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' actionpack (4.2.2) lib/action_controller/metal.rb:237:in `block in action' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call' rack (1.6.3) lib/rack/etag.rb:24:in `call' rack (1.6.3) lib/rack/conditionalget.rb:25:in `call' rack (1.6.3) lib/rack/head.rb:13:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call' rack (1.6.3) lib/rack/session/abstract/id.rb:225:in `context' rack (1.6.3) lib/rack/session/abstract/id.rb:220:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call' activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call' activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call' activerecord (4.2.2) lib/active_record/migration.rb:378:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call' activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks' activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks' activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' web-console (2.1.3) lib/web_console/middleware.rb:37:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app' railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged' activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged' activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged' railties (4.2.2) lib/rails/rack/logger.rb:20:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/request_id.rb:21:in `call' rack (1.6.3) lib/rack/methodoverride.rb:22:in `call' rack (1.6.3) lib/rack/runtime.rb:18:in `call' activesupport (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call' rack (1.6.3) lib/rack/lock.rb:17:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call' rack (1.6.3) lib/rack/sendfile.rb:113:in `call' railties (4.2.2) lib/rails/engine.rb:518:in `call' railties (4.2.2) lib/rails/application.rb:164:in `call' rack (1.6.3) lib/rack/lock.rb:17:in `call' rack (1.6.3) lib/rack/content_length.rb:15:in `call' rack (1.6.3) lib/rack/handler/webrick.rb:88:in `service' /home/shrakuma/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service' /home/shrakuma/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run' /home/shrakuma/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread' Rendered /home/shrakuma/.rvm/gems/ruby-2.2.1/gems/actionpack-4.2.2/lib/action_dispatch/middleware/templates/rescues/diagnostics.html.erb within rescues/layout (3.6ms) Started GET "/" for 127.0.0.1 at 2015-06-18 12:59:57 -0700 ArgumentError (wrong number of arguments (2 for 1)): actionpack (4.2.2) lib/action_dispatch/http/request.rb:338:in `parse_query' rack (1.6.3) lib/rack/request.rb:191:in `GET' actionpack (4.2.2) lib/action_dispatch/http/request.rb:300:in `GET' actionpack (4.2.2) lib/action_dispatch/http/parameters.rb:14:in `parameters' actionpack (4.2.2) lib/action_dispatch/http/filter_parameters.rb:37:in `filtered_parameters' actionpack (4.2.2) lib/action_controller/metal/instrumentation.rb:22:in `process_action' actionpack (4.2.2) lib/action_controller/metal/params_wrapper.rb:250:in `process_action' activerecord (4.2.2) lib/active_record/railties/controller_runtime.rb:18:in `process_action' actionpack (4.2.2) lib/abstract_controller/base.rb:137:in `process' actionview (4.2.2) lib/action_view/rendering.rb:30:in `process' actionpack (4.2.2) lib/action_controller/metal.rb:196:in `dispatch' actionpack (4.2.2) lib/action_controller/metal/rack_delegation.rb:13:in `dispatch' actionpack (4.2.2) lib/action_controller/metal.rb:237:in `block in action' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `call' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:74:in `dispatch' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:43:in `serve' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:43:in `block in serve' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `each' actionpack (4.2.2) lib/action_dispatch/journey/router.rb:30:in `serve' actionpack (4.2.2) lib/action_dispatch/routing/route_set.rb:819:in `call' rack (1.6.3) lib/rack/etag.rb:24:in `call' rack (1.6.3) lib/rack/conditionalget.rb:25:in `call' rack (1.6.3) lib/rack/head.rb:13:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/params_parser.rb:27:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/flash.rb:260:in `call' rack (1.6.3) lib/rack/session/abstract/id.rb:225:in `context' rack (1.6.3) lib/rack/session/abstract/id.rb:220:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/cookies.rb:560:in `call' activerecord (4.2.2) lib/active_record/query_cache.rb:36:in `call' activerecord (4.2.2) lib/active_record/connection_adapters/abstract/connection_pool.rb:649:in `call' activerecord (4.2.2) lib/active_record/migration.rb:378:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:29:in `block in call' activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `call' activesupport (4.2.2) lib/active_support/callbacks.rb:88:in `_run_callbacks' activesupport (4.2.2) lib/active_support/callbacks.rb:776:in `_run_call_callbacks' activesupport (4.2.2) lib/active_support/callbacks.rb:81:in `run_callbacks' actionpack (4.2.2) lib/action_dispatch/middleware/callbacks.rb:27:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/reloader.rb:73:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/remote_ip.rb:78:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call' web-console (2.1.3) lib/web_console/middleware.rb:37:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call' railties (4.2.2) lib/rails/rack/logger.rb:38:in `call_app' railties (4.2.2) lib/rails/rack/logger.rb:20:in `block in call' activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `block in tagged' activesupport (4.2.2) lib/active_support/tagged_logging.rb:26:in `tagged' activesupport (4.2.2) lib/active_support/tagged_logging.rb:68:in `tagged' railties (4.2.2) lib/rails/rack/logger.rb:20:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/request_id.rb:21:in `call' rack (1.6.3) lib/rack/methodoverride.rb:22:in `call' rack (1.6.3) lib/rack/runtime.rb:18:in `call' activesupport (4.2.2) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call' rack (1.6.3) lib/rack/lock.rb:17:in `call' actionpack (4.2.2) lib/action_dispatch/middleware/static.rb:113:in `call' rack (1.6.3) lib/rack/sendfile.rb:113:in `call' railties (4.2.2) lib/rails/engine.rb:518:in `call' railties (4.2.2) lib/rails/application.rb:164:in `call' rack (1.6.3) lib/rack/lock.rb:17:in `call' rack (1.6.3) lib/rack/content_length.rb:15:in `call' rack (1.6.3) lib/rack/handler/webrick.rb:88:in `service' /home/shrakuma/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:138:in `service' /home/shrakuma/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/httpserver.rb:94:in `run' /home/shrakuma/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/webrick/server.rb:294:in `block in start_thread'
我该如何解决这个错误？
新的Rack Gem版本1.6.3似乎有一个错误。 现在，尝试锁定Gemfile中的机架版本：
gem 'rack', '1.6.2'
之后运行bundle update rack 。
相关问题：
https://github.com/rack/rack/issues/896
更新
同时，1.6.4版本发布。 那也应该这样做。 https://github.com/rack/rack/issues/896#issuecomment-113299792
我们对Gemfile的快速修复：
gem 'rack', '1.6.1'
这应该取消阻止你，直到https://github.com/rails/rails/issues/20624得到解决。