passenger3: Error message: No such file to load -- application Exception class: LoadError

apache-configuration-fail

<VirtualHost *:80>
    DocumentRoot /var/www/ptest
    <Directory /var/www/ptest>
        AllowOverride all
        Options -MultiViews
    </Directory>
 
    RailsBaseURI /ptest
</VirtualHost>

apache-configuration-fixed

<VirtualHost *:80>
    DocumentRoot /var/www/ptest
    <Directory /var/www/ptest>
        AllowOverride all
        Options -MultiViews
    </Directory>
 
    RackBaseURI /ptest
</VirtualHost>

apache-configuration-ok

<VirtualHost *:80>
    DocumentRoot /var/rails/ptest/public
    <Directory /var/rails/ptest/public>
        AllowOverride all
        Options -MultiViews
    </Directory>
</VirtualHost>

apache-error.log

(eval):1: warning: already initialized constant RAILS_ROOT
 23 [ pid=4012 thr=13228340 file=utils.rb:176 time=2010-10-19 21:24:16.713 ]: *** Exception LoadError in PhusionPassenger::ClassicRails::ApplicationSpawner (No such file to load -- application) (process 4012, thread #<Thread:0x193b268>):
 24     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:304:in `depend_on'
 25     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/activesupport-3.0.1/lib/active_support/dependencies.rb:216:in `require_dependency'
 26     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/classic_rails/application_spawner.rb:250:in `preload_application'
 27     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/classic_rails/application_spawner.rb:181:in `initialize_server'
 28     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/utils.rb:564:in `report_app_init_status'
 29     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/classic_rails/application_spawner.rb:174:in `initialize_server'
 30     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server.rb:204:in `start_synchronously'
 31     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server.rb:180:in `start'
 32     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start'
 33     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/spawn_manager.rb:219:in `spawn_rails_application'
 34     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
 35     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application'
 36     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize'
 37     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
 38     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application'
 39     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application'
 40     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
 41     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
 42     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
 43     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
 44     from /usr/local/rvm/gems/ree-1.8.7-2010.02/gems/passenger-3.0.0/helper-scripts/passenger-spawn-server:99