Rails服务器突然在启动时保持退出状态。虽然它在不久前完美运作。从那以后我没有调整任何东西。
=> Booting WEBrick
=> Rails 4.0.2 application starting in development on http: //0.0.0.0:3000
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
Exiting
/home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:229:in `default_controller_and_action': missing :controller (ArgumentError)
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:116:in `normalize_options!'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:64:in `initialize'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1443:in `new'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1443:in `add_route'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1422:in `decomposed_match'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1403:in `block in match'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1394:in `each'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1394:in `match'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:601:in `map_method'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:570:in `post'
from /home/kavya/lms/config/routes.rb:11:in `block in <top (required)>'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:341:in `instance_exec'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:341:in `eval_block'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:319:in `draw'
from /home/kavya/lms/config/routes.rb:1:in `<top (required)>'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:223:in `load'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:223:in `block in load'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:223:in `load'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:40:in `block in load_paths'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:40:in `each'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:40:in `load_paths'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:16:in `reload!'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:26:in `block in updater'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/file_update_checker.rb:75:in `call'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/file_update_checker.rb:75:in `execute'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:27:in `updater'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `instance_exec'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `run'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:348:in `block (2 levels) in each_strongly_connected_component'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:345:in `each'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:345:in `call'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each'
from /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:54:in `run_initializers'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application.rb:215:in `initialize!'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /home/kavya/lms/config/environment.rb:5:in `<top (required)>'
from /home/kavya/lms/config.ru:3:in `require'
from /home/kavya/lms/config.ru:3:in `block in <main>'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
from /home/kavya/lms/config.ru:in `new'
from /home/kavya/lms/config.ru:in `<main>'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands/server.rb:48:in `app'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands/server.rb:75:in `start'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:76:in `block in <top (required)>'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
from /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
答案 0 :(得分：2)
你可以参考这里..
这是因为您的应用程序中config/routes.rb下的语法问题：
检查您可能会发现的路线，例如在以下路线中定义controller#action时。
语法不应该像：
root :to => 'home/index'
语法应该是：
root :to => 'home#index'