Heroku Error H12 (Tiempo de espera de solicitud) problema

Question

Sé que es otro Heroku Error H12 (Tiempo de espera de solicitud) problema. Parece que el problema es causado por muchas razones diferentes. Desplegué una aplicación Rails 3.2.2 en heroku hace unos días. Cuando intento acceder a mi aplicación a través del navegador. Obtuve

Application Error 
An error occurred in the application and your page could not be served. Please try  again in a few moments. 

If you are the application owner, check your logs for details. 

Así que empiezo a buscar en Internet como siempre para ver qué sucede. Luego aprendo a usar heroku logs para verificar mi archivo de registro. Aquí está el archivo de registro.

2012-06-11T03:16:51+00:00 heroku[web.1]: Unidling 
2012-06-11T03:16:51+00:00 heroku[web.1]: State changed from down to created 
2012-06-11T03:16:51+00:00 heroku[web.1]: State changed from created to starting 
2012-06-11T03:16:56+00:00 heroku[web.1]: Starting process with command `bundle exec rails server -p 43527` 
2012-06-11T03:17:09+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 
2012-06-11T03:17:09+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 
2012-06-11T03:17:09+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 
2012-06-11T03:17:16+00:00 app[web.1]: [2012-06-11 03:17:16] INFO WEBrick 1.3.1 
2012-06-11T03:17:16+00:00 app[web.1]: [2012-06-11 03:17:16] INFO WEBrick::HTTPServer#start: pid=1 port=43527 
2012-06-11T03:17:16+00:00 app[web.1]: [2012-06-11 03:17:16] INFO ruby 1.9.2 (2011-07-09) [x86_64-linux] 
2012-06-11T03:17:17+00:00 heroku[web.1]: State changed from starting to up 
2012-06-11T03:17:19+00:00 app[web.1]: => Booting WEBrick 
2012-06-11T03:17:19+00:00 app[web.1]: => Rails 3.2.2 application starting in production on http://0.0.0.0:43527 
2012-06-11T03:17:19+00:00 app[web.1]: => Call with -d to detach 
2012-06-11T03:17:19+00:00 app[web.1]: => Ctrl-C to shutdown server 
2012-06-11T03:17:19+00:00 app[web.1]: 
2012-06-11T03:17:19+00:00 app[web.1]: 
2012-06-11T03:17:19+00:00 app[web.1]: Started GET "/" for 123.240.186.119 at 2012-06-11 03:17:19 +0000 
2012-06-11T03:17:20+00:00 app[web.1]: Processing by StaticPagesController#home as HTML 
2012-06-11T03:17:20+00:00 app[web.1]: Rendered static_pages/home.html.erb within layouts/application (40.3ms) 
2012-06-11T03:17:49+00:00 heroku[router]: Error H12 (Request timeout) -> GET cold-lightning-6691.herokuapp.com/ dyno=web.1 queue= wait= service=30000ms status=503 bytes=0 

Después de revisar los registros, realmente no entiendo lo que está mal. Hice la investigación en Internet de nuevo. Parece que hay muchas razones diferentes que pueden causar este problema. Sé que tal vez haya algunos errores en mi aplicación. Pero no puedo decir qué parte de mi código está mal.

Y Puedo ejecutar mi aplicación en mi computadora local. Entonces, ¿sabes cuál es el problema o cómo detectar el problema?

Actualización:

Cuando hago git push heroku

recibo este mensaje de error

Your bundle is complete! It was installed into ./vendor/bundle 
     Cleaning up the bundler cache. 
-----> Writing config/database.yml to read from DATABASE_URL 
-----> Preparing app for Rails asset pipeline 
     Running: rake assets:precompile 
     rake aborted! 
     could not connect to server: Connection refused 
     Is the server running on host "127.0.0.1" and accepting 
     TCP/IP connections on port 5432? 

y corro $ activos heroku carrera de rake: --trace precompilación

Tengo

Running rake assets:precompile --trace attached to terminal... up, run.1 
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-  rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7) 
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7) 
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7) 
** Invoke assets:precompile (first_time) 
** Execute assets:precompile 
/usr/local/bin/ruby /app/vendor/bundle/ruby/1.9.1/bin/rake assets:precompile:all  RAILS_ENV=production RAILS_GROUPS=assets --trace 
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7) 
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7) 
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/01/04/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/Rakefile:7) 
** Invoke assets:precompile:all (first_time) 
** Execute assets:precompile:all 
** Invoke assets:precompile:primary (first_time) 
** Invoke assets:environment (first_time) 
** Execute assets:environment 
** Invoke environment (first_time) 
** Execute environment 
** Invoke tmp:cache:clear (first_time) 
** Execute tmp:cache:clear 
** Execute assets:precompile:primary 
rake aborted! 
Unexpected token: operator (<) (line: 11780, col: 1, pos: 325392) 

Error 
at new JS_Parse_Error (/tmp/execjs20120611-10-3yiu6e.js:497:22) 
at js_error (/tmp/execjs20120611-10-3yiu6e.js:505:15) 
at croak (/tmp/execjs20120611-10-3yiu6e.js:954:17) 
at token_error (/tmp/execjs20120611-10-3yiu6e.js:961:17) 
at unexpected (/tmp/execjs20120611-10-3yiu6e.js:967:17) 
at /tmp/execjs20120611-10-3yiu6e.js:1340:17 
at maybe_unary (/tmp/execjs20120611-10-3yiu6e.js:1425:27) 
at expr_ops (/tmp/execjs20120611-10-3yiu6e.js:1452:32) 
at maybe_conditional (/tmp/execjs20120611-10-3yiu6e.js:1456:28) 
at maybe_assign (/tmp/execjs20120611-10-3yiu6e.js:1480:28) 
    (in /app/app/assets/javascripts/application.js) 
/app/vendor/bundle/ruby/1.9.1/gems/execjs-1.3.0/lib/execjs/external_runtime.rb:67:in `extract_result' 
/app/vendor/bundle/ruby/1.9.1/gems/execjs-1.3.0/lib/execjs/external_runtime.rb:27:in `block in exec' 
/app/vendor/bundle/ruby/1.9.1/gems/execjs-1.3.0/lib/execjs/external_runtime.rb:40:in `compile_to_tempfile' 
/app/vendor/bundle/ruby/1.9.1/gems/execjs-1.3.0/lib/execjs/external_runtime.rb:26:in `exec' 
/app/vendor/bundle/ruby/1.9.1/gems/uglifier-1.2.3/lib/uglifier.rb:101:in `compile' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/compressors.rb:74:in `compress' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/processing.rb:265:in `block in js_compressor=' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/processor.rb:29:in `call' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/processor.rb:29:in `evaluate' 
/app/vendor/bundle/ruby/1.9.1/gems/tilt-1.3.3/lib/tilt/template.rb:76:in `render' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/context.rb:177:in `block in evaluate' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/context.rb:174:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/context.rb:174:in `evaluate' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/bundled_asset.rb:26:in `initialize' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:244:in `new' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:244:in `build_asset' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/index.rb:89:in `block in build_asset' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/caching.rb:19:in `cache_asset' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/index.rb:88:in `build_asset' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:163:in `find_asset' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/index.rb:56:in `find_asset' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/static_compiler.rb:20:in `block in compile' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:212:in `block in each_logical_path' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:200:in `block (2 levels) in each_file' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:190:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:190:in `each_entry' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:198:in `block in each_file' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:197:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:197:in `each_file' 
/app/vendor/bundle/ruby/1.9.1/gems/sprockets-2.1.2/lib/sprockets/base.rb:210:in `each_logical_path' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/static_compiler.rb:18:in `compile' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/assets.rake:56:in `internal_precompile' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/assets.rake:70:in `block (3 levels) in <top (required)>' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/assets.rake:60:in `block (3 levels) in <top (required)>' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>' 
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `load' 
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `<main>' 
Tasks: TOP => assets:precompile:primary 
rake aborted! 
Command failed with status (1): [/usr/local/bin/ruby /app/vendor/bundle/rub...] 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/file_utils.rb:53:in `block in create_shell_runner' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/file_utils.rb:45:in `call' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/file_utils.rb:45:in `sh' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/file_utils_ext.rb:39:in `sh' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/file_utils.rb:80:in `ruby' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/file_utils_ext.rb:39:in `ruby' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/assets.rake:12:in `ruby_rake_task' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/assets.rake:21:in `invoke_or_reboot_rake_task' 
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.2/lib/sprockets/assets.rake:29:in `block (2 levels) in <top (required)>' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/usr/local/lib/ruby/1.9.1/monitor.rb:201:in `mon_synchronize' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run' 
/app/vendor/bundle/ruby/1.9.1/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>' 
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `load' 
/app/vendor/bundle/ruby/1.9.1/bin/rake:19:in `<main>' 
Tasks: TOP => assets:precompile 

Answer 1

Los errores resultaron ser application.css. Hay errores en uno .css.scss archivos en /assets/stylesheets

Cuando me encontré con el rastrillo assets:precompile en mahcine local, se mostró errores en application.css. Indicó qué código en application.css es incorrecto.

Después revisada css y tengo que poner config.assets.initialize_on_precompile = false' in config/application.rb' http://www.simonecarletti.com/blog/2012/02/heroku-and-rails-3-2-assetprecompile-error/

El problema resuelto!

Answer 2

Parece que está recibiendo un tiempo de espera, tal vez la llamada de feed() lleva más de 30 segundos?

Más sobre los códigos de error H12 en https://devcenter.heroku.com/articles/error-codes#h12__request_timeout. También le recomiendo que instale rack-timeout como se describe en https://devcenter.heroku.com/articles/request-timeout.

Answer 3

Esto me ha pasado hoy. No es un comportamiento típico, pero aparentemente todo lo que tenía que hacer era regañar a Heroku a través del monitor de mi computadora, esperar a que pensara en lo malo que había sido, y finalmente se corrigió su comportamiento.

A veces Heroku está de mal humor?

Answer 4

Tuve un problema muy similar y lo redujo a un problema de conexión con la base de datos. Estoy usando ClearDB en la pila Cedar de Heroku y descubrí que al insertar "usar ActiveRecord :: ConnectionAdapters :: ConnectionManagement" en mi archivo config.ru, el problema desaparece.

Answer 5

Tuve un problema similar y después de rendirme por un día, volví y encontré mi error. No estaba enviando una respuesta al cliente cuando ocurrió un error en el servidor. Asegúrese de devolver una respuesta sin importar el resultado de su algoritmo del lado del servidor. Si hay un error, devuélvalo. Si la solicitud fue exitosa, devuelva esa respuesta. Espero que eso ayude.

Si eso no ayuda, consulte las guías de heroku sobre el manejo de tiempos de espera de solicitudes, especialmente la sección de tiempos de espera de solicitud de depuración podría ser de ayuda.