# 500 Internal Error **URL:** \ **Category:** Rails\ **Created:** [February 6, 2010, 10:46am UTC](https://www.ruby-forum.com/t/500-internal-error/183025 "2010-02-06T10:46:58Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![nbsimsah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47774/32.png) [@nbsimsah](https://www.ruby-forum.com/u/nbsimsah)\ **Post date:** [February 6, 2010, 10:46am UTC](https://www.ruby-forum.com/t/500-internal-error/183025/1 "2010-02-06T10:46:58Z")
I have on ubuntu a digital library application Kete which gives in the log/production.log: Please help, thnx. /!\ FAILSAFE /!\ Fri Feb 05 19:05:08 +0200 2010 Status: 500 Internal Server Error No connection to server (localhost:11211 DEAD (Errno::ECONNREFUSED: Connection refused - connect(2)), will retry at Fri Feb 05 19:05:38 +0200 2010) /usr/local/lib/ruby/gems/1.8/gems/memcache-client-1.7.7/lib/ memcache.rb:855:in `with_socket_management' /usr/local/lib/ruby/gems/1.8/gems/memcache-client-1.7.7/lib/ memcache.rb:732:in`cache\_get’ /usr/local/lib/ruby/gems/1.8/gems/memcache-client-1.7.7/lib/ memcache.rb:253:in `get' /usr/local/lib/ruby/gems/1.8/gems/memcache-client-1.7.7/lib/ memcache.rb:878:in`with\_server’ /usr/local/lib/ruby/gems/1.8/gems/memcache-client-1.7.7/lib/ memcache.rb:251:in `get' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ session/mem_cache_store.rb:61:in`initialize’ /usr/local/lib/ruby/1.8/cgi/session.rb:280:in `new' /usr/local/lib/ruby/1.8/cgi/session.rb:280:in`initialize\_without\_cgi\_reader’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ cgi\_ext/session.rb:39:in `initialize' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ cgi_process.rb:132:in`new’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ cgi\_process.rb:132:in `session' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ cgi_process.rb:168:in`stale\_session\_check!’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ cgi\_process.rb:116:in `session' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ base.rb:1139:in`assign\_shortcuts\_without\_flash’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ flash.rb:166:in `assign_shortcuts' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ base.rb:523:in`process\_without\_filters’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ filters.rb:568:in `process_without_session_management_support' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ session_management.rb:130:in`process’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ base.rb:389:in `process' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ dispatcher.rb:149:in`handle\_request’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ dispatcher.rb:107:in `dispatch' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ dispatcher.rb:104:in`synchronize’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ dispatcher.rb:104:in `dispatch' /home/kete/apps/kato/vendor/rails/actionpack/lib/action_controller/ dispatcher.rb:120:in`dispatch\_cgi’ /home/kete/apps/kato/vendor/rails/actionpack/lib/action\_controller/ dispatcher.rb:35:in `dispatch' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/railz/request_handler.rb:50:in`process\_request’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/abstract\_request\_handler.rb:207:in `main_loop' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/railz/application_spawner.rb:378:in`start\_request\_handler’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/railz/application\_spawner.rb:336:in `handle_spawn_application' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/utils.rb:183:in`safe\_fork’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/railz/application\_spawner.rb:334:in `handle_spawn_application' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/abstract_server.rb:352:in` **send** ’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/abstract\_server.rb:352:in `main_loop' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/abstract_server.rb:196:in`start\_synchronously’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/abstract\_server.rb:163:in `start' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/railz/application_spawner.rb:213:in`start’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/spawn\_manager.rb:262:in `spawn_rails_application' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/abstract_server_collection.rb:126:in`lookup\_or\_add’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/spawn\_manager.rb:256:in `spawn_rails_application' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/abstract_server_collection.rb:80:in`synchronize’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/abstract\_server\_collection.rb:79:in `synchronize' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/spawn_manager.rb:255:in`spawn\_rails\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/spawn\_manager.rb:154:in `spawn_application' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/spawn_manager.rb:287:in`handle\_spawn\_application’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/abstract\_server.rb:352:in ` __send__' /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion_passenger/abstract_server.rb:352:in`main\_loop’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/lib/ phusion\_passenger/abstract\_server.rb:196:in `start\_synchronously’ /usr/local/lib/ruby/gems/1.8/gems/passenger-2.2.5/bin/passenger- spawn-server:61 ---
**Author:** ![nbsimsah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47774/32.png) [@nbsimsah](https://www.ruby-forum.com/u/nbsimsah)\ **Post date:** [February 6, 2010, 11:31am UTC](https://www.ruby-forum.com/t/500-internal-error/183025/2 "2010-02-06T11:31:26Z")
On Feb 6, 6:50 am, nbsimsah [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > I have on ubuntu a digital library application Kete which gives in the > log/production.log: > > Please help, thnx. > > /!\ FAILSAFE /!\ Fri Feb 05 19:05:08 +0200 2010 > Status: 500 Internal Server Error > No connection to server (localhost:11211 DEAD (Errno::ECONNREFUSED: > Connection refused - connect(2)), will retry at Fri Feb 05 19:05:38 > +0200 2010) Looks like your app is trying to use memcache but it couldn’t talk to the memcache server. Fred ---
**Author:** ![nbsimsah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47774/32.png) [@nbsimsah](https://www.ruby-forum.com/u/nbsimsah)\ **Post date:** [February 6, 2010, 11:44am UTC](https://www.ruby-forum.com/t/500-internal-error/183025/3 "2010-02-06T11:44:49Z")
Hello, As per your post, i think you are trying to run application on the already used port. so try to use some alternate port and try to run application. ---
**Author:** ![nbsimsah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47774/32.png) [@nbsimsah](https://www.ruby-forum.com/u/nbsimsah)\ **Post date:** [February 6, 2010, 12:49pm UTC](https://www.ruby-forum.com/t/500-internal-error/183025/4 "2010-02-06T12:49:15Z")
Hi Fred, I can’t telnet localhost 112111 either. I will dig in and notify what happened. Thank you for the prompt suggestion Ahmet On Feb 6, 12:29 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) ---
**Author:** ![nbsimsah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47774/32.png) [@nbsimsah](https://www.ruby-forum.com/u/nbsimsah)\ **Post date:** [February 8, 2010, 2:39am UTC](https://www.ruby-forum.com/t/500-internal-error/183025/5 "2010-02-08T02:39:26Z")
On Sun, 2010-02-07 at 17:22 -0800, nbsimsah wrote: > apps/ > kato/ > log/development.log exists and is chmod 0666. The log level has been > raised to > W > ARN and the output directed to STDERR until the problem is fixed. * * * ## chmod -R 666 /home/kete/apps/kato/log > `const_missing' app/models/basket.rb:49 app/controllers/application.rb:143:in`load\_standard\_baskets’ * * * line 49 in /home/kete/apps/kato/app/models/basket.rb has something referring to HELP\_BASKET It doesn’t work - it is causing an error. You are going to have to learn how to solve these errors. Craig – This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. ---
**Author:** ![nbsimsah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/n/e47774/32.png) [@nbsimsah](https://www.ruby-forum.com/u/nbsimsah)\ **Post date:** [February 8, 2010, 2:24am UTC](https://www.ruby-forum.com/t/500-internal-error/183025/6 "2010-02-08T02:24:13Z")
By the adventrous KETE installation on Ubuntu server, 500 error is gone, but I’m missing still some crucial intallation steps (?) Upon ruby script/server command the server generates the following error. The development database is empty. I entered in to basket table just a dummy name. ## Thanks being patient with me. =\> Booting WEBrick… Rails Error: Unable to access log file. Please ensure that /home/kete/ apps/ kato/ log/development.log exists and is chmod 0666. The log level has been raised to W ARN and the output directed to STDERR until the problem is fixed. =\> Rails 2.1.2 application started on [http://0.0.0.0:3000](http://0.0.0.0:3000) =\> Ctrl-C to shutdown server; call with --help for options [2010-02-08 04:52:15] INFO WEBrick 1.3.1 [2010-02-08 04:52:15] INFO ruby 1.8.7 (2009-06-12) [i686-linux] [2010-02-08 04:52:15] INFO WEBrick::HTTPServer#start: pid=18687 port=3000 * * * NameError in Index pageController#index uninitialized constant Basket::HELP\_BASKET RAILS\_ROOT: /home/kete/apps/kato Application Trace | Framework Trace | Full Trace vendor/rails/activesupport/lib/active\_support/dependencies.rb:493:in `const_missing' app/models/basket.rb:49 app/controllers/application.rb:143:in `load\_standard\_baskets’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:493:in `const_missing' vendor/rails/activesupport/lib/active_support/dependencies.rb:216:in `load\_without\_new\_constant\_marking’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:216:in `load_file' vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in `new\_constants\_in’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:215:in `load_file' vendor/rails/activesupport/lib/active_support/dependencies.rb:96:in `require\_or\_load’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:261:in `load_missing_constant' vendor/rails/activesupport/lib/active_support/dependencies.rb:468:in `const\_missing’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:480:in `const_missing' vendor/rails/activesupport/lib/active_support/dependencies.rb:486:in `send’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:486:in `const_missing' vendor/rails/activesupport/lib/active_support/callbacks.rb:173:in `send’ vendor/rails/activesupport/lib/active\_support/callbacks.rb:173:in `evaluate_method' vendor/rails/activesupport/lib/active_support/callbacks.rb:161:in `call’ vendor/rails/actionpack/lib/action\_controller/filters.rb:191:in `call' vendor/rails/actionpack/lib/action_controller/filters.rb:591:in `run\_before\_filters’ vendor/rails/actionpack/lib/action\_controller/filters.rb:577:in `call_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:572:in `perform\_action\_without\_benchmark’ vendor/rails/actionpack/lib/action\_controller/benchmarking.rb:68:in `perform_action_without_rescue' /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure’ vendor/rails/actionpack/lib/action\_controller/benchmarking.rb:68:in `perform_action_without_rescue' vendor/rails/actionpack/lib/action_controller/rescue.rb:201:in `perform\_action\_without\_caching’ vendor/rails/actionpack/lib/action\_controller/caching/sql\_cache.rb: 13:in `perform_action' vendor/rails/activerecord/lib/active_record/connection_adapters/ abstract/query_cache.rb:33:in `cache’ vendor/rails/activerecord/lib/active\_record/query\_cache.rb:8:in `cache' vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb: 12:in `perform\_action’ vendor/rails/actionpack/lib/action\_controller/base.rb:529:in `send' vendor/rails/actionpack/lib/action_controller/base.rb:529:in `process\_without\_filters’ vendor/rails/actionpack/lib/action\_controller/filters.rb:568:in `process_without_session_management_support' vendor/rails/actionpack/lib/action_controller/session_management.rb: 130:in `process’ vendor/rails/actionpack/lib/action\_controller/base.rb:389:in `process' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:149:in `handle\_request’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:107:in `dispatch' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in `synchronize’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:104:in `dispatch' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:120:in `dispatch\_cgi’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:35:in `dispatch' vendor/rails/railties/lib/webrick_server.rb:112:in `handle\_dispatch’ vendor/rails/railties/lib/webrick\_server.rb:78:in `service' /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service’ /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start\_thread’ /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start' /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start\_thread’ /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start' /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `each’ /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start' /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start’ /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start' vendor/rails/railties/lib/webrick_server.rb:62:in `dispatch’ vendor/rails/railties/lib/commands/servers/webrick.rb:66 /usr/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `gem_original_require' /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:510:in `require' vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in `new\_constants\_in’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:510:in `require' vendor/rails/railties/lib/commands/server.rb:39 /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem\_original\_require’ /usr/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `require’ script/server:3 vendor/rails/activesupport/lib/active\_support/dependencies.rb:493:in `const_missing' app/models/basket.rb:49 vendor/rails/activesupport/lib/active_support/dependencies.rb:216:in `load\_without\_new\_constant\_marking’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:216:in `load_file' vendor/rails/activesupport/lib/active_support/dependencies.rb:355:in `new\_constants\_in’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:215:in `load_file' vendor/rails/activesupport/lib/active_support/dependencies.rb:96:in `require\_or\_load’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:261:in `load_missing_constant' vendor/rails/activesupport/lib/active_support/dependencies.rb:468:in `const\_missing’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:480:in `const_missing' vendor/rails/activesupport/lib/active_support/dependencies.rb:486:in `send’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:486:in `const_missing' app/controllers/application.rb:143:in `load\_standard\_baskets’ vendor/rails/activesupport/lib/active\_support/callbacks.rb:173:in `send' vendor/rails/activesupport/lib/active_support/callbacks.rb:173:in `evaluate\_method’ vendor/rails/activesupport/lib/active\_support/callbacks.rb:161:in `call' vendor/rails/actionpack/lib/action_controller/filters.rb:191:in `call’ vendor/rails/actionpack/lib/action\_controller/filters.rb:591:in `run_before_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:577:in `call\_filters’ vendor/rails/actionpack/lib/action\_controller/filters.rb:572:in `perform_action_without_benchmark' vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform\_action\_without\_rescue’ /usr/local/lib/ruby/1.8/benchmark.rb:293:in `measure' vendor/rails/actionpack/lib/action_controller/benchmarking.rb:68:in `perform\_action\_without\_rescue’ vendor/rails/actionpack/lib/action\_controller/rescue.rb:201:in `perform_action_without_caching' vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb: 13:in `perform\_action’ vendor/rails/activerecord/lib/active\_record/connection\_adapters/ abstract/query\_cache.rb:33:in `cache' vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in `cache’ vendor/rails/actionpack/lib/action\_controller/caching/sql\_cache.rb: 12:in `perform_action' vendor/rails/actionpack/lib/action_controller/base.rb:529:in `send’ vendor/rails/actionpack/lib/action\_controller/base.rb:529:in `process_without_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:568:in `process\_without\_session\_management\_support’ vendor/rails/actionpack/lib/action\_controller/session\_management.rb: 130:in `process' vendor/rails/actionpack/lib/action_controller/base.rb:389:in `process’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:149:in `handle_request' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:107:in `dispatch’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:104:in `synchronize' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:104:in `dispatch’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:120:in `dispatch_cgi' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:35:in `dispatch’ vendor/rails/railties/lib/webrick\_server.rb:112:in `handle_dispatch' vendor/rails/railties/lib/webrick_server.rb:78:in `service’ /usr/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service' /usr/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run’ /usr/local/lib/ruby/1.8/webrick/server.rb:173:in `start_thread' /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start’ /usr/local/lib/ruby/1.8/webrick/server.rb:162:in `start_thread' /usr/local/lib/ruby/1.8/webrick/server.rb:95:in `start’ /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `each' /usr/local/lib/ruby/1.8/webrick/server.rb:92:in `start’ /usr/local/lib/ruby/1.8/webrick/server.rb:23:in `start' /usr/local/lib/ruby/1.8/webrick/server.rb:82:in `start’ vendor/rails/railties/lib/webrick\_server.rb:62:in `dispatch' vendor/rails/railties/lib/commands/servers/webrick.rb:66 /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem\_original\_require’ /usr/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `require' vendor/rails/activesupport/lib/active_support/dependencies.rb:510:in `require’ vendor/rails/activesupport/lib/active\_support/dependencies.rb:355:in `new_constants_in' vendor/rails/activesupport/lib/active_support/dependencies.rb:510:in `require’ vendor/rails/railties/lib/commands/server.rb:39 /usr/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `gem_original_require' /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require’ script/server:3 Request Parameters: {“urlified\_name”=\>“kete”} Show session dump * * * flash: !map:ActionController::Flash::FlashHash {} On Feb 6, 12:29 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)