Heroku Application error
I don't understand why this will be happen.Can anyone tell me why this will be happening...?
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.
Logs
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/config.ru:in `new'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/config.ru:in `<main>'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
2014-01-15T09:12:41.883290+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
2014-01-15T09:12:41.882761+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:54:in `run_initializers'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands/server.rb:48:in `app'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:76:in `block in <top (required)>'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
2014-01-15T09:12:41.883859+00:00 app[web.1]: from bin/rails:4:in `require'
2014-01-15T09:12:41.883457+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands/server.rb:75:in `start'
2014-01-15T09:12:41.883859+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
2014-01-15T09:12:41.883859+00:00 app[web.1]: from bin/rails:4:in `<main>'
2014-01-15T09:12:41.913025+00:00 app[web.1]: => Booting WEBrick
2014-01-15T09:12:41.913025+00:00 app[web.1]: => Rails 4.0.2 application starting in production on http://0.0.0.0:49194
2014-01-15T09:12:41.913025+00:00 app[web.1]: => Run `rails server -h` for more startup options
2014-01-15T09:12:41.913025+00:00 app[web.1]: => Ctrl-C to shutdown server
2014-01-15T09:12:41.913025+00:00 app[web.1]: Exiting
2014-01-15T09:12:43.365057+00:00 heroku[web.1]: Process exited with status 1
2014-01-15T09:12:43.388570+00:00 heroku[web.1]: State changed from starting to crashed
2014-01-15T09:34:57.545417+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=scitech.herokuapp.com fwd="39.36.135.145" dyno= connect= service= status=503 bytes=
2014-01-15T09:34:58.737978+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=scitech.herokuapp.com fwd="39.36.135.145" dyno= connect= service= status=503 bytes=
2014-01-15T09:39:33.012548+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=
2014-01-15T09:39:37.499410+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=
2014-01-15T09:39:37.937049+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=
2014-01-15T09:39:31.872794+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=
2014-01-15T09:40:42.463904+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/ host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=
2014-01-15T09:40:43.143297+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=
2014-01-15T09:43:54.807645+00:00 heroku[web.1]: State changed from crashed to starting
2014-01-15T09:43:57.879492+00:00 heroku[web.1]: Starting process with command `bin/rails server -p 4381 -e $RAILS_ENV`
2014-01-15T09:44:00.873725+00:00 app[web.1]: /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require': /app/app/models/banners.rb:2: syntax error, unexpected tIDENTIFIER, expecting '}' (SyntaxError)
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application/finisher.rb:56:in `block in <module:Finisher>'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `instance_exec'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:30:in `run'
2014-01-15T09:44:00.873725+00:00 app[web.1]: validates :title, presence: true, length: {minimum: 5 maximum: 25}
2014-01-15T09:44:00.873725+00:00 app[web.1]: ^
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:330:in `require_or_load'
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:289:in `depend_on'
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:207:in `require_dependency'
2014-01-15T09:44:00.873725+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/engine.rb:465:in `block (2 levels) in eager_load!'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/engine.rb:464:in `each'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/engine.rb:464:in `block in eager_load!'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/engine.rb:462:in `each'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/engine.rb:462:in `eager_load!'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/engine.rb:347:in `eager_load!'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application/finisher.rb:56:in `each'
2014-01-15T09:44:00.874065+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:55:in `block in run_initializers'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/ruby-2.0.0/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/initializable.rb:54:in `run_initializers'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/application.rb:215:in `initialize!'
2014-01-15T09:44:00.874393+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/railtie/configurable.rb:30:in `method_missing'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/config/environment.rb:5:in `<top (required)>'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `block in require'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:214:in `load_dependency'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.2/lib/active_support/dependencies.rb:229:in `require'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/config.ru:3:in `block in <main>'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `instance_eval'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:55:in `initialize'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/config.ru:in `new'
2014-01-15T09:44:00.875246+00:00 app[web.1]: from /app/config.ru:in `<main>'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands/server.rb:48:in `app'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands/server.rb:75:in `start'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:76:in `block in <top (required)>'
2014-01-15T09:44:00.875456+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `tap'
2014-01-15T09:44:00.875890+00:00 app[web.1]: from /app/vendor/bundle/ruby/2.0.0/gems/railties-4.0.2/lib/rails/commands.rb:71:in `<top (required)>'
2014-01-15T09:44:00.875890+00:00 app[web.1]: from bin/rails:4:in `<main>'
2014-01-15T09:44:00.898780+00:00 app[web.1]: => Booting WEBrick
2014-01-15T09:44:00.898780+00:00 app[web.1]: => Rails 4.0.2 application starting in production on http://0.0.0.0:4381
2014-01-15T09:44:00.898780+00:00 app[web.1]: => Run `rails server -h` for more startup options
2014-01-15T09:44:00.898780+00:00 app[web.1]: => Ctrl-C to shutdown server
2014-01-15T09:44:00.898780+00:00 app[web.1]: Exiting
2014-01-15T09:44:00.875890+00:00 app[web.1]: from bin/rails:4:in `require'
2014-01-15T09:44:02.058347+00:00 heroku[web.1]: Process exited with status 1
2014-01-15T09:44:02.077676+00:00 heroku[web.1]: State changed from starting to crashed
2014-01-15T09:44:13.799826+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path=/favicon.ico host=scitech.herokuapp.com fwd="39.42.60.156" dyno= connect= service= status=503 bytes=