Status: 500 Internal Server Error when starting ruby applica

I am trying to run an Ruby on Rails application developed internally. Any input would be greatly appreciated…

When I start the server I get the following warning:

[shajizaidi@worf script]$ ./server => Booting WEBrick => Rails 2.3.2 application starting on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server [2009-05-28 18:29:41] INFO WEBrick 1.3.1 [2009-05-28 18:29:41] INFO ruby 1.8.7 (2008-08-11) [i686-linux] [2009-05-28 18:29:46] WARN TCPServer Error: Address already in use - bind(2) [2009-05-28 18:29:46] INFO WEBrick::HTTPServer#start: pid=4587 port=3000

I have checked that there is no other application using port 3000

With lsof | grep 3000

I have tried to start the WEBrick on a different port and get the same warning:

[shajizaidi@worf script]$ ./server -p 3001 => Booting WEBrick => Rails 2.3.2 application starting on http://0.0.0.0:3001 => Call with -d to detach => Ctrl-C to shutdown server [2009-05-28 19:12:34] INFO WEBrick 1.3.1 [2009-05-28 19:12:34] INFO ruby 1.8.7 (2008-08-11) [i686-linux] [2009-05-28 19:12:39] WARN TCPServer Error: Address already in use - bind(2) [2009-05-28 19:12:39] INFO WEBrick::HTTPServer#start: pid=4805 port=3001

When I try to access the application through the firefox browser I get the following error and trace:

  SQL (0.2ms) SET NAMES 'utf8'   SQL (0.1ms) SET SQL_AUTO_IS_NULL=0 /!\ FAILSAFE /!\ Thu May 28 19:15:14 -0700 2009   Status: 500 Internal Server Error   no such file to load -- lib/zmags/zmags     /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'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:521:in `new_constants_in'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:156:in `require'     /home/shajizaidi/e-mangue/app/controllers/application_controller.rb:5     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:380:in `load_without_new_constant_marking'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:380:in `load_file'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:521:in `new_constants_in'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:379:in `load_file'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:259:in `require_or_load'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:425:in `load_missing_constant'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:80:in `const_missing'     /usr/local/lib/ruby/gems/1.8/gems/activesupport-2.3.2/lib/active_support/dependencies.rb:92:in `const_missing'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:90:in `dispatch'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:111:in `_call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:82:in `initialize'     /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:29:in `call'     /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:29:in `call'     /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'     /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:9:in `cache'     /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/query_cache.rb:28:in `call'     /usr/local/lib/ruby/gems/1.8/gems/activerecord-2.3.2/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/head.rb:9:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/methodoverride.rb:24:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/params_parser.rb:15:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/rewindable_input.rb:25:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/session/cookie_store.rb:93:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/reloader.rb:9:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/failsafe.rb:11:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `synchronize'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/lock.rb:11:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/dispatcher.rb:106:in `call'     /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails/rack/static.rb:31:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/urlmap.rb:46:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/urlmap.rb:40:in `each'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/urlmap.rb:40:in `call'     /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/rails/rack/log_tailer.rb:17:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/content_length.rb:13:in `call'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/handler/webrick.rb:46: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'     /usr/local/lib/ruby/gems/1.8/gems/actionpack-2.3.2/lib/action_controller/vendor/rack-1.0/rack/handler/webrick.rb:13:in `run'     /usr/local/lib/ruby/gems/1.8/gems/rails-2.3.2/lib/commands/server.rb:111     /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'     ./server:3