我正在尝试在我的共享DreamHost帐户上部署一个非常简单的Rails应用程序，并且卡住了。日志输出似乎没有告诉我出了什么问题。
当我在浏览器中访问应用程序的任何资源时，它会返回标准的404错误页面（public / 404.html）。 log / production.log文件中的所有内容都表示：
Started GET "/" for 198.144.202.78 at Wed Aug 15 14:34:58 -0700 2012 Processing by HomeController#index as HTML Rendered home/index.html.erb within layouts/application (5.3ms)
Started GET "/internal_error.html" for 198.144.202.78 at Wed Aug 15 14:34:58 -0700 2012
ActionController::RoutingError (No route matches [GET] "/internal_error.html"):
actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app'
railties (3.2.8) lib/rails/rack/logger.rb:16:in `call'
actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call'
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
rack (1.4.1) lib/rack/runtime.rb:17:in `call'
activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
rack (1.4.1) lib/rack/lock.rb:15:in `call'
rack-cache (1.2) lib/rack/cache/context.rb:136:in `forward'
rack-cache (1.2) lib/rack/cache/context.rb:245:in `fetch'
rack-cache (1.2) lib/rack/cache/context.rb:185:in `lookup'
rack-cache (1.2) lib/rack/cache/context.rb:66:in `call!'
rack-cache (1.2) lib/rack/cache/context.rb:51:in `call'
railties (3.2.8) lib/rails/engine.rb:479:in `call'
railties (3.2.8) lib/rails/application.rb:223:in `call'
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `send'
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `method_missing'
/dh/passenger/lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
/dh/passenger/lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request'
/dh/passenger/lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
/dh/passenger/lib/phusion_passenger/rack/application_spawner.rb:205:in `start_request_handler'
/dh/passenger/lib/phusion_passenger/rack/application_spawner.rb:170:in `send'
/dh/passenger/lib/phusion_passenger/rack/application_spawner.rb:170:in `handle_spawn_application'
/dh/passenger/lib/phusion_passenger/utils.rb:479:in `safe_fork'
/dh/passenger/lib/phusion_passenger/rack/application_spawner.rb:165:in `handle_spawn_application'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:180:in `start'
/dh/passenger/lib/phusion_passenger/rack/application_spawner.rb:128:in `start'
/dh/passenger/lib/phusion_passenger/spawn_manager.rb:253:in `spawn_rack_application'
/dh/passenger/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
/dh/passenger/lib/phusion_passenger/spawn_manager.rb:246:in `spawn_rack_application'
/dh/passenger/lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize'
/dh/passenger/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
/dh/passenger/lib/phusion_passenger/spawn_manager.rb:244:in `spawn_rack_application'
/dh/passenger/lib/phusion_passenger/spawn_manager.rb:137:in `spawn_application'
/dh/passenger/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
/dh/passenger/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
/dh/passenger/helper-scripts/passenger-spawn-server:99
据我了解，报告的唯一错误是找不到要重定向到的“internal_error.html”页面。 （虽然我确实在public / internal_error.html创建了一个 - 但没有帮助）。无论如何，它并没有告诉我它遇到了什么错误（这正是我正在寻找的）。我在config / environments / production.rb中设置了config.log_level =：debug。
apache错误日志（〜/ logs / MY_DOMAIN / http / error.log）只说：
[Wed Aug 15 14:34:58 2012] [error] [client 198.144.202.78] Premature end of script headers:
无论如何，这是我的Gemfile：
source 'https://rubygems.org'
gem 'rails', '3.2.8'
# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'
gem 'sqlite3'
gem 'mysql2'
gem 'json'
# Gems used only for assets and not required
# in production environments by default.
group :assets do
gem 'sass-rails', '~> 3.2.3'
# gem 'coffee-rails', '~> 3.2.1'
# See https://github.com/sstephenson/execjs#readme for more supported runtimes
# gem 'therubyracer', :platforms => :ruby
gem 'uglifier', '>= 1.0.3'
end
gem 'jquery-rails'
gem 'ruby-debug'
gem "rake", "0.8.7"
#gem "rmagick"
# gem "rmagick", ">= 1.15", :require => 'RMagick'
gem "rmagick", "1.15.14", :require => 'RMagick'
gem "carrierwave"
gem "therubyracer"
有关环境的一些细节：
rails - 使用〜/ .gems / bin / rails版本3.2.8 ruby - 使用/ usr / bin / ruby据我所知1.8.7版 rake - 使用/usr/lib/ruby/gems/1.8/bin//rake version 0.8.7
我能够成功运行bundle和rake db：migrate（跳过很多箍之后）。