我正在试图找出为什么我的应用程序崩溃，我的slug大小非常大54mb但在我的计算机上文件夹大小就像3mb，这是我的日志文件:(当然rails服务器运行完全正常，但是可以找出heroku问题）
2011-11-12T20:40:08+00:00 heroku[rake.2]: State changed from created to starting
2011-11-12T20:40:29+00:00 app[rake.2]: Awaiting client
2011-11-12T20:40:30+00:00 heroku[rake.2]: State changed from starting to up
2011-11-12T20:40:35+00:00 heroku[rake.2]: Process exited
2011-11-12T20:40:36+00:00 heroku[rake.2]: State changed from up to complete
2011-11-12T20:42:04+00:00 heroku[rake.3]: State changed from created to starting
2011-11-12T20:42:19+00:00 app[rake.3]: Awaiting client
2011-11-12T20:42:19+00:00 app[rake.3]: Starting process with command `bundle exec rake db:migrate`
2011-11-12T20:42:19+00:00 heroku[rake.3]: State changed from starting to up
2011-11-12T20:42:23+00:00 heroku[rake.3]: Process exited
2011-11-12T20:42:24+00:00 heroku[rake.3]: State changed from up to complete
2011-11-12T20:43:17+00:00 heroku[web.1]: State changed from crashed to created
2011-11-12T20:43:17+00:00 heroku[web.1]: State changed from created to starting
2011-11-12T20:43:33+00:00 heroku[web.1]: Starting process with command `thin -p 28660 -e production -R /home/heroku_rack/heroku.ru start`
2011-11-12T20:43:37+00:00 app[web.1]: /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in `rescue in establish_connection': Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (pg is not part of the bundle. Add it to Gemfile.) (RuntimeError)
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:68:in `establish_connection'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:60:in `establish_connection'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:55:in `establish_connection'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/railtie.rb:69:in `block (2 levels) in <class:Railtie>'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/lazy_load_hooks.rb:26:in `on_load'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/railtie.rb:67:in `block in <class:Railtie>'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `instance_exec'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `run'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:55:in `block in run_initializers'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `each'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `run_initializers'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/application.rb:96:in `initialize!'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2011-11-12T20:43:37+00:00 app[web.1]: from <internal:lib/rubygems/custom_require>:29:in `require'
2011-11-12T20:43:37+00:00 app[web.1]: from <internal:lib/rubygems/custom_require>:29:in `require'
2011-11-12T20:43:37+00:00 app[web.1]: from config.ru:3:in `block (3 levels) in <main>'
2011-11-12T20:43:37+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:23:in `eval'
2011-11-12T20:43:37+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:23:in `block (3 levels) in <main>'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `instance_eval'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `initialize'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:120:in `new'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:120:in `map'
2011-11-12T20:43:37+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:18:in `block (2 levels) in <main>'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `instance_eval'
2011-11-12T20:43:37+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `initialize'
2011-11-12T20:43:37+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11:in `new'
2011-11-12T20:43:37+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11:in `block in <main>'
2011-11-12T20:43:37+00:00 heroku[web.1]: Process exited
2011-11-12T20:43:38+00:00 heroku[web.1]: State changed from starting to crashed
2011-11-12T20:43:40+00:00 heroku[router]: Error H10 (App crashed) -> GET mazurgroup.heroku.com/ dyno= queue= wait= service= status=503 bytes=
2011-11-12T20:43:40+00:00 heroku[nginx]: 209.6.52.33 - - [12/Nov/2011:12:43:40 -0800] "GET / HTTP/1.1" 503 607 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome
2011-11-12T20:43:40+00:00 heroku[router]: Error H10 (App crashed) -> GET mazurgroup.heroku.com/favicon.ico dyno= queue= wait= service= status=503 bytes=
2011-11-12T20:43:40+00:00 heroku[nginx]: 209.6.52.33 - - [12/Nov/2011:12:43:40 -0800] "GET /favicon.ico HTTP/1.1" 503 607 "-" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.106 Safari/535.2" mazurgroup.heroku.com
2011-11-12T20:44:06+00:00 heroku[web.1]: State changed from crashed to created
2011-11-12T20:44:06+00:00 heroku[web.1]: State changed from created to starting
2011-11-12T20:44:21+00:00 heroku[web.1]: Starting process with command `thin -p 10810 -e production -R /home/heroku_rack/heroku.ru start`
2011-11-12T20:44:25+00:00 app[web.1]: /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in `rescue in establish_connection': Please install the postgresql adapter: `gem install activerecord-postgresql-adapter` (pg is not part of the bundle. Add it to Gemfile.) (RuntimeError)
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:68:in `establish_connection'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:60:in `establish_connection'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:55:in `establish_connection'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/railtie.rb:69:in `block (2 levels) in <class:Railtie>'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/lazy_load_hooks.rb:36:in `instance_eval'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/lazy_load_hooks.rb:36:in `execute_hook'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activesupport-3.1.1/lib/active_support/lazy_load_hooks.rb:26:in `on_load'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/railtie.rb:67:in `block in <class:Railtie>'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `instance_exec'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:30:in `run'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:55:in `block in run_initializers'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `each'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/initializable.rb:54:in `run_initializers'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/application.rb:96:in `initialize!'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/railties-3.1.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2011-11-12T20:44:25+00:00 app[web.1]: from <internal:lib/rubygems/custom_require>:29:in `require'
2011-11-12T20:44:25+00:00 app[web.1]: from <internal:lib/rubygems/custom_require>:29:in `require'
2011-11-12T20:44:25+00:00 app[web.1]: from config.ru:3:in `block (3 levels) in <main>'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:23:in `eval'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:23:in `block (3 levels) in <main>'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `instance_eval'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `initialize'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:120:in `new'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:18:in `block (2 levels) in <main>'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:120:in `map'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `instance_eval'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `initialize'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11:in `new'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:11:in `block in <main>'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `instance_eval'
2011-11-12T20:44:25+00:00 app[web.1]: from /app/.bundle/gems/ruby/1.9.1/gems/rack-1.3.5/lib/rack/builder.rb:51:in `initialize'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:1:in `<main>'
2011-11-12T20:44:25+00:00 app[web.1]: from /home/heroku_rack/heroku.ru:1:in `new'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/lib/rack/adapter/loader.rb:36:in `eval'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/lib/rack/adapter/loader.rb:36:in `load'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/lib/thin/controllers/controller.rb:175:in `load_rackup_config'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/lib/thin/controllers/controller.rb:65:in `start'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/lib/thin/runner.rb:177:in `run_command'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/lib/thin/runner.rb:143:in `run!'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/lib/ruby/gems/1.9.1/gems/thin-1.2.6/bin/thin:6:in `<top (required)>'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/bin/thin:19:in `load'
2011-11-12T20:44:25+00:00 app[web.1]: from /usr/ruby1.9.2/bin/thin:19:in `<main>'
2011-11-12T20:44:25+00:00 heroku[web.1]: Process exited
2011-11-12T20:44:26+00:00 heroku[web.1]: State changed from starting to crashed
答案 0 :(得分：7)
深入了解日志文件
2011-11-12T20：43：37 + 00:00 app [web.1]： /app/.bundle/gems/ruby/1.9.1/gems/activerecord-3.1.1/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in
rescue in establish_connection': Please install the postgresql adapter:gem install activerecord-postgresql-adapter` （pg不是一部分 捆绑。将它添加到Gemfile。）（RuntimeError）
是你问题的原因。
Heroku提供PostgreSql - 因此你需要将pg gem添加到你的Gemfile中 - 假设你现在正在使用sqlite3进行开发
group :development do
gem 'sqlite3'
end
group :production do
gem 'pg'
end
重新投入，投入并重新投入Heroku，你应该没事。