前几天这还在工作，但我刚刚将我的代码更新到了运行 Passenger 2.2.4 的审查服务器，而我的 2.3.4 rails 应用程序现在无法在那个盒子上启动。
乘客报告：
Passenger encountered the following error:
The application spawner server exited unexpectedly: Unexpected end-of-file detected.
Exception class:
PhusionPassenger::Railz::ApplicationSpawner::Error
Backtrace:
# File Line Location
0 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/railz/application_spawner.rb 218 in `start'
1 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb 261 in `spawn_rails_application'
2 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/abstract_server_collection.rb 126 in `lookup_or_add'
3 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb 255 in `spawn_rails_application'
4 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/abstract_server_collection.rb 80 in `synchronize'
5 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize'
6 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb 254 in `spawn_rails_application'
7 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb 153 in `spawn_application'
8 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/spawn_manager.rb 286 in `handle_spawn_application'
9 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/abstract_server.rb 351 in `__send__'
10 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/abstract_server.rb 351 in `main_loop'
11 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/lib/phusion_passenger/abstract_server.rb 195 in `start_synchronously'
12 /usr/lib/ruby/gems/1.8/gems/passenger-2.2.4/bin/passenger-spawn-server 61
有任何想法吗？