[ pid=9627 file=ext/apache2/Hooks.cpp:700 time=2010-07-08 15:26:01.489 ]:
  The backend application (process 9779) did not send a valid HTTP response; instead, it sent nothing at all. It is possible that it has crashed; please check whether there are crashing bugs in this application.
*** Exception TypeError in PhusionPassenger::Rack::ApplicationSpawner (can't convert Array into String) (process 9779):
  from /usr/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/utils.rb:138:in `union'
  from /usr/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/utils.rb:138
  from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
  from /usr/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `require'
  from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:510:in `require'
  from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:355:in `new_constants_in'
  from /usr/lib/ruby/gems/1.8/gems/activesupport-2.1.1/lib/active_support/dependencies.rb:510:in `require'
  from /usr/lib/ruby/gems/1.8/gems/rack-1.2.1/lib/rack/request.rb:1
  from /usr/lib/ruby/site_ruby/1.8/puppet/network/http/rack.rb:35:in `call'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/rack/request_handler.rb:92:in `process_request'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/abstract_request_handler.rb:207:in `main_loop'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/rack/application_spawner.rb:120:in `run'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/rack/application_spawner.rb:65:in `spawn_application'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/utils.rb:252:in `safe_fork'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/rack/application_spawner.rb:58:in `spawn_application'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/rack/application_spawner.rb:41:in `spawn_application'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/spawn_manager.rb:159:in `spawn_application'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/spawn_manager.rb:287:in `handle_spawn_application'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/abstract_server.rb:352:in `__send__'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/abstract_server.rb:352:in `main_loop'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/lib/phusion_passenger/abstract_server.rb:196:in `start_synchronously'
  from /usr/lib/ruby/gems/1.8/gems/passenger-2.2.14/bin/passenger-spawn-server:61