ROR部署过程中使用debug功能时出现的大量错误信息

    在windows上开发rails应用，然后一直到unix上。在安装rails的环境的时候，参考robbin的方式，差不多没有什么大的问题。但是部署之后的运行发生问题：不论采用mongrel或者fastcgi部署，都会出现应用挂死的现象。

    如果能够运行起来，说明应用本身及其配置没有什么大的问题。同时挂死，说是ruby在运行rb时，不知道怎么回事找一个进程就挂死。

    然后通过ruby -d script/server或者ruby -d dispatch.fcgi,都会出现大量的错误和告警。难道是rails版本及其各个组件的版本的问题。于是重新使用instantrails最新版（实际上也很老了，2.0.2的rails和1.86的ruby），进行-d操作，同样出现大量的错误和告警提示。

    我就纳闷了，为什么在一个已经出炉的产品中，会有这么大量的错误信息呢？其中有些错误，如Could not find RubyGem fastthread (>= 0)，可以通过安装这些gem包的方式去除（但是还是比较纳闷，我不需要，为什么要安装呢？）。最纳闷的是，在这么多错误信息产生的过程中，居然应用可以正常运行。

   希望这篇博文可以引发大家的思考：如何做到不出错的部署应用。

 

附件：

Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem builder (~> 2.
1.2)

Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem xml-simple (~>
 1.0.11)

Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- fast_xs
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- fast_xs
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- utf8proc_native
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- utf8proc_native
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- utf8proc_native
Exception `ArgumentError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/fcgi.rb:11 - unsupported signal SIGPIPE
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- mongrel
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/gems.rb:7 - no
 such file to load -- fastthread
Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem fastthread (>=
 0)

Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/lib/mongrel/gems.rb:7 - no
 such file to load -- mongrel_experimental
Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem mongrel_experi
mental (>= 1.1.2)

=> Booting Mongrel (use 'script/server webrick' to force WEBrick)
Exception `Errno::EEXIST' at D:/ir1/ruby/lib/ruby/1.8/fileutils.rb:243 - File exists - D:/ir1/rails_apps/test1/tmp/cache

Exception `Errno::EEXIST' at D:/ir1/ruby/lib/ruby/1.8/fileutils.rb:243 - File exists - D:/ir1/rails_apps/test1/tmp/pids
Exception `Errno::EEXIST' at D:/ir1/ruby/lib/ruby/1.8/fileutils.rb:243 - File exists - D:/ir1/rails_apps/test1/tmp/sessi
ons
Exception `Errno::EEXIST' at D:/ir1/ruby/lib/ruby/1.8/fileutils.rb:243 - File exists - D:/ir1/rails_apps/test1/tmp/socke
ts
=> Rails application starting on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
D:/ir1/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:188: warning: instance variable @host not
 initialized
D:/ir1/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:188: warning: instance variable @includes
 not initialized
D:/ir1/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:188: warning: instance variable @num_proc
essors not initialized
** Starting Mongrel listening at 0.0.0.0:3000
** Starting Rails with development environment...
D:/ir1/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/rails.rb:135: warning: instance variable
 @rails_handler not initialized
D:/ir1/rails_apps/test1/config/boot.rb:8: warning: method redefined; discarding old boot!
D:/ir1/rails_apps/test1/config/boot.rb:15: warning: method redefined; discarding old booted?
D:/ir1/rails_apps/test1/config/boot.rb:19: warning: method redefined; discarding old pick_boot
D:/ir1/rails_apps/test1/config/boot.rb:23: warning: method redefined; discarding old vendor_rails?
D:/ir1/rails_apps/test1/config/boot.rb:28: warning: method redefined; discarding old preinitialize
D:/ir1/rails_apps/test1/config/boot.rb:32: warning: method redefined; discarding old preinitializer_path
D:/ir1/rails_apps/test1/config/boot.rb:38: warning: method redefined; discarding old run
D:/ir1/rails_apps/test1/config/boot.rb:45: warning: method redefined; discarding old load_initializer
D:/ir1/rails_apps/test1/config/boot.rb:51: warning: method redefined; discarding old load_initializer
D:/ir1/rails_apps/test1/config/boot.rb:57: warning: method redefined; discarding old load_rails_gem
D:/ir1/rails_apps/test1/config/boot.rb:69: warning: method redefined; discarding old rubygems_version
D:/ir1/rails_apps/test1/config/boot.rb:73: warning: method redefined; discarding old gem_version
D:/ir1/rails_apps/test1/config/boot.rb:83: warning: method redefined; discarding old load_rubygems
D:/ir1/rails_apps/test1/config/boot.rb:96: warning: method redefined; discarding old parse_gem_version
D:/ir1/rails_apps/test1/config/boot.rb:101: warning: method redefined; discarding old read_environment_rb
D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:233: warning: instance variable @ig
nore_new_methods not initialized
D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/migration.rb:233: warning: instance variable @ig
nore_new_methods not initialized
D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/attribute_methods.rb:8: warning: `*' interpreted
 as argument prefix
D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/schema_definitions.
rb:195: warning: `*' interpreted as argument prefix
D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/schema_definitions.
rb:202: warning: `*' interpreted as argument prefix
D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/connection_specific
ation.rb:41: warning: method redefined; discarding old allow_concurrency=
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/routing.rb:7: warning: method redefined; disca
rding old to_param
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- securerandom
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- securerandom
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- securerandom
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/cgi_ext/session.rb:44: warning: method redefin
ed; discarding old create_new_id
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/cgi_ext/session.rb:51: warning: method redefin
ed; discarding old initialize
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/core_ext/kern
el/requires.rb:19 - no such file to load -- memcache
Exception `DRb::DRbServerNotFound' at D:/ir1/ruby/lib/ruby/1.8/drb/drb.rb:1650 - DRb::DRbServerNotFound
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- memcache
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/core_ext/kern
el/requires.rb:19 - no such file to load -- memcache
Exception `TypeError' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/core_ext/class/inheri
table_attributes.rb:131 - can't dup TrueClass
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/session/active_record_store.rb:182: warning: m
ethod redefined; discarding old connection
(eval):1: warning: method redefined; discarding old headers
(eval):1: warning: method redefined; discarding old response
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/helpers/sanitize_helper.rb:103: warning: ambiguous f
irst argument; put parentheses or even spaces
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/core_ext/kern
el/requires.rb:19 - no such file to load -- redcloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- bluecloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- bluecloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- bluecloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- bluecloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- bluecloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- bluecloth
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/core_ext/kern
el/requires.rb:19 - no such file to load -- bluecloth
Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem tmail (~> 1.1.
0)

Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem text-format (>
= 0.6.3)

Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27 - no such file to load
 -- tmail/scanner_c.so
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:34 - no such file to load
 -- tmail/scanner_c.so
Exception `MissingSourceFile' at D:/ir1/ruby/lib/ruby/gems/1.8/gems/activesupport-2.0.2/lib/active_support/dependencies.
rb:499 - no such file to load -- tmail/scanner_c.so
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionmailer-2.0.2/lib/action_mailer/vendor/tmail-1.1.0/tmail/net.rb:136: warning: me
thod redefined; discarding old create_reply
Exception `Gem::LoadError' at D:/ir1/ruby/lib/ruby/site_ruby/1.8/rubygems.rb:379 - Could not find RubyGem activerecord-s
qlite3-adapter (>= 0)

D:/ir1/ruby/lib/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/observer.rb:35: warning: instance variable @obse
rvers not initialized
D:/ir1/ruby/lib/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/routing.rb:1281: warning: instance variable @r
outes_last_modified not initialized