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我把我的所有代码都推送到了heroku，并且当我给它的命令heroku域来访问我的工作。 heroku页面给我申请错误。 这些是日志。为什么heroku应用程序错误？
2017-07-16T03:37:15.182579+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/initializable.rb:55:in `block in run_initializers'
2017-07-16T03:37:15.182580+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
2017-07-16T03:37:15.182581+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
2017-07-16T03:37:15.182582+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
2017-07-16T03:37:15.182583+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
2017-07-16T03:37:15.182584+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `each'
2017-07-16T03:37:15.182585+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `call'
2017-07-16T03:37:15.182587+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
2017-07-16T03:37:15.182588+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
2017-07-16T03:37:15.182589+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
2017-07-16T03:37:15.182590+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/initializable.rb:54:in `run_initializers'
2017-07-16T03:37:15.182604+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/application.rb:288:in `initialize!'
2017-07-16T03:37:15.182604+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2017-07-16T03:37:15.182605+00:00 app[web.1]: from /app/config.ru:3:in `require'
2017-07-16T03:37:15.182607+00:00 app[web.1]: from /app/config.ru:3:in `block in <main>'
2017-07-16T03:37:15.182607+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:55:in `instance_eval'
2017-07-16T03:37:15.182608+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:55:in `initialize'
2017-07-16T03:37:15.182609+00:00 app[web.1]: from /app/config.ru:in `new'
2017-07-16T03:37:15.182610+00:00 app[web.1]: from /app/config.ru:in `<main>'
2017-07-16T03:37:15.182611+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:49:in `eval'
2017-07-16T03:37:15.182613+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:49:in `new_from_string'
2017-07-16T03:37:15.182614+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:40:in `parse_file'
2017-07-16T03:37:15.182626+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:277:in `build_app_and_options_from_config'
2017-07-16T03:37:15.182627+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:199:in `app'
2017-07-16T03:37:15.182628+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/server.rb:50:in `app'
2017-07-16T03:37:15.182628+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:314:in `wrapped_app'
2017-07-16T03:37:15.182629+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:250:in `start'
2017-07-16T03:37:15.182630+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/server.rb:69:in `start'
2017-07-16T03:37:15.182630+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:81:in `block in server'
2017-07-16T03:37:15.182632+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:76:in `tap'
2017-07-16T03:37:15.182632+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:76:in `server'
2017-07-16T03:37:15.182633+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
2017-07-16T03:37:15.182634+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands.rb:17:in `<top (required)>'
2017-07-16T03:37:15.182636+00:00 app[web.1]: from bin/rails:9:in `require'
2017-07-16T03:37:15.182637+00:00 app[web.1]: from bin/rails:9:in `<main>'
2017-07-16T03:37:15.277934+00:00 heroku[web.1]: State changed from starting to crashed
2017-07-16T03:37:15.264831+00:00 heroku[web.1]: Process exited with status 1
2017-07-16T08:56:50.023136+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=francophone-inukshuk-10644.herokuapp.com request_id=27b2d524-48dd-4c93-8d7c-afa14f7ccaa7 fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T08:56:50.910825+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=francophone-inukshuk-10644.herokuapp.com request_id=ce505a0d-de1e-4f4c-b825-ce891ef2685c fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T08:56:51.663725+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=francophone-inukshuk-10644.herokuapp.com request_id=6083341c-6096-428f-8c70-80108f3fad89 fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T08:58:35.306777+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=francophone-inukshuk-10644.herokuapp.com request_id=48674ea3-fde0-4e6a-b09d-4f04845dc28a fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T08:58:35.910619+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=francophone-inukshuk-10644.herokuapp.com request_id=eaf9d3c3-f75f-4d1a-b1e0-e7f730777d84 fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T09:17:40.559334+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=francophone-inukshuk-10644.herokuapp.com request_id=dcefa7f5-96a9-4461-823e-b40ca8910dab fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T09:17:41.266886+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=francophone-inukshuk-10644.herokuapp.com request_id=36260ad7-8e57-4604-999c-1b12e1a69ed6 fwd="41.239.63.196" dyno= connect= service= status=503 bytes= protocol=http
2017-07-16T09:21:31.687856+00:00 heroku[web.1]: State changed from crashed to starting
2017-07-16T09:21:34.507130+00:00 heroku[web.1]: Starting process with command `bin/rails server -p 37743 -e production`
2017-07-16T09:21:37.693633+00:00 app[web.1]: /app/vendor/bundle/ruby/2.3.0/gems/activesupport-4.1.0/lib/active_support/values/time_zone.rb:285: warning: circular argument reference - now
2017-07-16T09:21:38.880081+00:00 app[web.1]: => Booting WEBrick
2017-07-16T09:21:38.880097+00:00 app[web.1]: => Rails 4.1.0 application starting in production on http://0.0.0.0:37743
2017-07-16T09:21:38.880098+00:00 app[web.1]: => Run `rails server -h` for more startup options
2017-07-16T09:21:38.880100+00:00 app[web.1]: => Ctrl-C to shutdown server
2017-07-16T09:21:38.880105+00:00 app[web.1]: Exiting
2017-07-16T09:21:38.880100+00:00 app[web.1]: => Notice: server is listening on all interfaces (0.0.0.0). Consider using 127.0.0.1 (--binding option)
2017-07-16T09:21:38.880142+00:00 app[web.1]: /app/app/mailers/contact_mailer.rb:1:in `<top (required)>': uninitialized constant ActiveMailer (NameError)
2017-07-16T09:21:38.880144+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/engine.rb:468:in `block (2 levels) in eager_load!'
2017-07-16T09:21:38.880145+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/engine.rb:467:in `each'
2017-07-16T09:21:38.880147+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/engine.rb:467:in `block in eager_load!'
2017-07-16T09:21:38.880149+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/engine.rb:465:in `eager_load!'
2017-07-16T09:21:38.880150+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/engine.rb:346:in `eager_load!'
2017-07-16T09:21:38.880148+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/engine.rb:465:in `each'
2017-07-16T09:21:38.880209+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/application/finisher.rb:58:in `each'
2017-07-16T09:21:38.880210+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/application/finisher.rb:58:in `block in <module:Finisher>'
2017-07-16T09:21:38.880210+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `instance_exec'
2017-07-16T09:21:38.880211+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/initializable.rb:30:in `run'
2017-07-16T09:21:38.880212+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/initializable.rb:55:in `block in run_initializers'
2017-07-16T09:21:38.880212+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:228:in `block in tsort_each'
2017-07-16T09:21:38.880213+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:350:in `block (2 levels) in each_strongly_connected_component'
2017-07-16T09:21:38.880214+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:431:in `each_strongly_connected_component_from'
2017-07-16T09:21:38.880214+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:349:in `block in each_strongly_connected_component'
2017-07-16T09:21:38.880215+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `each'
2017-07-16T09:21:38.880216+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `each_strongly_connected_component'
2017-07-16T09:21:38.880215+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:347:in `call'
2017-07-16T09:21:38.880216+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:226:in `tsort_each'
2017-07-16T09:21:38.880217+00:00 app[web.1]: from /app/vendor/ruby-2.3.4/lib/ruby/2.3.0/tsort.rb:205:in `tsort_each'
2017-07-16T09:21:38.880217+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/initializable.rb:54:in `run_initializers'
2017-07-16T09:21:38.880218+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/application.rb:288:in `initialize!'
2017-07-16T09:21:38.880218+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2017-07-16T09:21:38.880219+00:00 app[web.1]: from /app/config.ru:3:in `require'
2017-07-16T09:21:38.880219+00:00 app[web.1]: from /app/config.ru:3:in `block in <main>'
2017-07-16T09:21:38.880220+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:55:in `instance_eval'
2017-07-16T09:21:38.880220+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:55:in `initialize'
2017-07-16T09:21:38.880220+00:00 app[web.1]: from /app/config.ru:in `new'
2017-07-16T09:21:38.880221+00:00 app[web.1]: from /app/config.ru:in `<main>'
2017-07-16T09:21:38.880221+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:49:in `eval'
2017-07-16T09:21:38.880222+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:49:in `new_from_string'
2017-07-16T09:21:38.880222+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/builder.rb:40:in `parse_file'
2017-07-16T09:21:38.880223+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:277:in `build_app_and_options_from_config'
2017-07-16T09:21:38.880223+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:199:in `app'
2017-07-16T09:21:38.880223+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/server.rb:50:in `app'
2017-07-16T09:21:38.880224+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:314:in `wrapped_app'
2017-07-16T09:21:38.880226+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/rack-1.5.5/lib/rack/server.rb:250:in `start'
2017-07-16T09:21:38.880226+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/server.rb:69:in `start'
2017-07-16T09:21:38.880227+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:81:in `block in server'
2017-07-16T09:21:38.880227+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:76:in `tap'
2017-07-16T09:21:38.880227+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:76:in `server'
2017-07-16T09:21:38.880228+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
2017-07-16T09:21:38.880228+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.3.0/gems/railties-4.1.0/lib/rails/commands.rb:17:in `<top (required)>'
2017-07-16T09:21:38.880229+00:00 app[web.1]: from bin/rails:9:in `require'
2017-07-16T09:21:38.880229+00:00 app[web.1]: from bin/rails:9:in `<main>'
2017-07-16T09:21:39.037285+00:00 heroku[web.1]: State changed from starting to crashed
2017-07-16T09:21:39.025315+00:00 heroku[web.1]: Process exited with status 1
让我们看看你的'contact_mailer.rb'代码 – Pavan