我现在面临的一些问题展开我的rails托管在BlueHost的应用程序。
我认为这个问题是乘客版本钢轨4程式互动，但我不知道。
当我启动我的应用程序我得到这个跟踪：
Ruby (Rack) application could not be started
These are the possible causes:
There may be a syntax error in the application's code. Please check for such errors and fix them.
A required library may not installed. Please install all libraries that this application requires.
The application may not be properly configured. Please check whether all configuration files are written correctly, fix any incorrect configurations, and restart this application.
A service that the application relies on (such as the database server or the Ferret search engine server) may not have been started. Please start that service.
Further information about the error may have been written to the application's log file. Please check it in order to analyse the problem.
Error message:
Could not initialize MySQL client library
Exception class:
RuntimeError
Application root:
/home5/barracam/rails_apps/admin/admin
Backtrace:
# File Line Location
0 /home5/barracam/ruby/gems/gems/mysql2-0.3.18/lib/mysql2.rb 31 in `require'
1 /home5/barracam/ruby/gems/gems/mysql2-0.3.18/lib/mysql2.rb 31 in `'
2 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler/runtime.rb 72 in `require'
3 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler/runtime.rb 72 in `block (2 levels) in require'
4 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler/runtime.rb 70 in `each'
5 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler/runtime.rb 70 in `block in require'
6 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler/runtime.rb 59 in `each'
7 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler/runtime.rb 59 in `require'
8 /usr/lib64/ruby/gems/1.9.3/gems/bundler-1.3.5/lib/bundler.rb 132 in `require'
9 /home5/barracam/rails_apps/admin/admin/config/application.rb 7 in `'
10 /home5/barracam/rails_apps/admin/admin/config/environment.rb 2 in `require'
11 /home5/barracam/rails_apps/admin/admin/config/environment.rb 2 in `'
12 config.ru 3 in `require'
13 config.ru 3 in `block in'
14 /home5/barracam/ruby/gems/gems/rack-1.5.2/lib/rack/builder.rb 55 in `instance_eval'
15 /home5/barracam/ruby/gems/gems/rack-1.5.2/lib/rack/builder.rb 55 in `initialize'
16 config.ru 1 in `new'
17 config.ru 1 in `'
18 /etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb 225 in `eval'
19 /etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb 225 in `load_rack_app'
20 /etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb 157 in `block in initialize_server'
21 /etc/httpd/modules/passenger/lib/phusion_passenger/utils.rb 563 in `report_app_init_status'
22 /etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb 154 in `initialize_server'
23 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb 204 in `start_synchronously'
24 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb 180 in `start'
25 /etc/httpd/modules/passenger/lib/phusion_passenger/rack/application_spawner.rb 129 in `start'
26 /etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb 253 in `block (2 levels) in spawn_rack_application'
27 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server_collection.rb 132 in `lookup_or_add'
28 /etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb 246 in `block in spawn_rack_application'
29 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server_collection.rb 82 in `block in synchronize'
30 prelude> 10:in `synchronize'
31 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server_collection.rb 79 in `synchronize'
32 /etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb 244 in `spawn_rack_application'
33 /etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb 137 in `spawn_application'
34 /etc/httpd/modules/passenger/lib/phusion_passenger/spawn_manager.rb 275 in `handle_spawn_application'
35 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb 357 in `server_main_loop'
36 /etc/httpd/modules/passenger/lib/phusion_passenger/abstract_server.rb 206 in `start_synchronously'
37 /etc/httpd/modules/passenger/helper-scripts/passenger-spawn-server 99 in `'
Powered by Phusion Passenger, mod_rails / mod_rack for Apache and Nginx.
我试图运行一个Rails 3应用程序，一切工作正常。 你怎么看待这个问题呢？
任何帮助非常感谢。
