Rails server exits on startup. (Rails 4.0.2) -


rails server keeps exiting on startup. though worked little while ago. haven't tweaked since.

=> booting webrick => rails 4.0.2 application starting in development on http: //0.0.0.0:3000 => run `rails server -h` more startup options => ctrl-c 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)     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:116:in `normalize_options!'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:64:in `initialize'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1443:in `new'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1443:in `add_route'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1422:in `decomposed_match'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1403:in `block in match'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1394:in `each'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:1394:in `match'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:601:in `map_method'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/mapper.rb:570:in `post'     /home/kavya/lms/config/routes.rb:11:in `block in <top (required)>'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:341:in `instance_exec'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:341:in `eval_block'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/actionpack-4.0.2/lib/action_dispatch/routing/route_set.rb:319:in `draw'     /home/kavya/lms/config/routes.rb:1:in `<top (required)>'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:223:in `load'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:223:in `block in load'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:223:in `load'     /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'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:40:in `each'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:40:in `load_paths'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:16:in `reload!'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:26:in `block in updater'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/file_update_checker.rb:75:in `call'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/activesupport-4.0.2/lib/active_support/file_update_checker.rb:75:in `execute'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:27:in `updater'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application/finisher.rb:69:in `block in <module:finisher>'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `instance_exec'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `run'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:226:in `block in tsort_each'     /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'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:427:in `each_strongly_connected_component_from'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:347:in `block in each_strongly_connected_component'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:345:in `each'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:345:in `call'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:345:in `each_strongly_connected_component'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:224:in `tsort_each'     /home/kavya/.rvm/rubies/ruby-2.1.0/lib/ruby/2.1.0/tsort.rb:205:in `tsort_each'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/initializable.rb:54:in `run_initializers'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/application.rb:215:in `initialize!'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/railtie/configurable.rb:30:in `method_missing'     /home/kavya/lms/config/environment.rb:5:in `<top (required)>'     /home/kavya/lms/config.ru:3:in `require'     /home/kavya/lms/config.ru:3:in `block in <main>'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'     /home/kavya/lms/config.ru:in `new'     /home/kavya/lms/config.ru:in `<main>'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'     /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'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands/server.rb:48:in `app'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/rack-1.5.2/lib/rack/server.rb:314:in     `wrapped_app'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands/server.rb:75:in `start'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:76:in `block in <top (required)>'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'     /home/kavya/.rvm/gems/ruby-2.1.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'     bin/rails:4:in `require'     bin/rails:4:in `<main>'

as can refer here..

why development server not loading? default_controller_and_action': missing :action (argumenterror)

it's because of syntax problem under config/routes.rb in application:

check routes may find example while defining controller#action in routes below..

syntax should not like:

root :to => 'home/index'

syntax should like:

root :to => 'home#index'


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