i've run into the same issue and found the easiest solution to be completely disabling css generation in production; e.g. add
Sass::Plugin.options[:never_update] = true to `config/environments/production.rb` On Thursday, June 28, 2012 1:55:54 AM UTC-5, jsmorris wrote: > > Due to my site having low volume, heroku spins down/idles my dyno. So, > when the first request comes in I get a 500 Internal Server Error. Then, > when I refresh, the app comes up as expected. > > Has anyone experienced this and could help with a solution? > > The interesting line in the log output is > > 2012-06-28T04:18:31+00:00 app[web.1]: Permission denied - > /app/public/stylesheets/admin/assets.css > > Thanks, > Jason > > Here is my log when this happens > > 2012-06-28T03:42:45+00:00 heroku[web.1]: Unidling > 2012-06-28T03:42:45+00:00 heroku[web.1]: State changed from down to > starting > 2012-06-28T03:42:50+00:00 heroku[web.1]: Starting process with command > `thin -p 52699 -e staging -R /home/heroku_rack/heroku.ru start` > 2012-06-28T03:42:57+00:00 app[web.1]: There is no support for CoffeeScript > 2012-06-28T03:42:58+00:00 app[web.1]: [Clipped] Using image thumbnailer: > ImageMagick 6.6.0-4 2010-06-01 Q16 http://www.imagemagick.org > 2012-06-28T03:42:59+00:00 app[web.1]: >> Thin web server (v1.2.6 codename > Crazy Delicious) > 2012-06-28T03:42:59+00:00 app[web.1]: >> Listening on 0.0.0.0:52699, > CTRL+C to stop > 2012-06-28T03:42:59+00:00 app[web.1]: >> Maximum connections set to 1024 > 2012-06-28T03:43:00+00:00 heroku[web.1]: State changed from starting to up > 2012-06-28T03:43:03+00:00 heroku[router]: GET > pisr-staging.heroku.com/favicon.ico dyno=web.1 queue=0 wait=0ms > service=9ms status=200 bytes=0 > 2012-06-28T04:18:31+00:00 heroku[router]: GET > pisr-staging.heroku.com/cleanple-home/ dyno=web.1 queue=0 wait=0ms > service=1746ms status=500 bytes=309 > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:356:in > > `initialize' > 2012-06-28T04:18:31+00:00 app[web.1]: /!\ FAILSAFE /!\ Wed Jun 27 > 21:18:31 -0700 2012 > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:356:in > > `open' > 2012-06-28T04:18:31+00:00 app[web.1]: Permission denied - > /app/public/stylesheets/admin/assets.css > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:356:in > > `write_file' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:349:in > > `update_stylesheet' > 2012-06-28T04:18:31+00:00 app[web.1]: Status: 500 Internal Server Error > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:202:in > > `update_stylesheets' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:200:in > > `each' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin.rb:81:in > > `update_stylesheets' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/rack.rb:51:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin/compiler.rb:200:in > > `update_stylesheets' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/sass-3.1.19/rails/../lib/sass/../sass/plugin.rb:54:in > > `check_for_updates' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-cache-1.0.3/lib/rack/cache/context.rb:132:in > > `forward' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-cache-1.0.3/lib/rack/cache/context.rb:243:in > > `fetch' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-cache-1.0.3/lib/rack/cache/context.rb:181:in > > `lookup' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-cache-1.0.3/lib/rack/cache/context.rb:65:in > > `call!' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-cache-1.0.3/lib/rack/cache/context.rb:50:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/actionpack-2.3.14/lib/action_controller/string_coercion.rb:25:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/head.rb:9:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/methodoverride.rb:24:in > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/actionpack-2.3.14/lib/action_controller/params_parser.rb:15:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/actionpack-2.3.14/lib/action_controller/session/cookie_store.rb:99:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/actionpack-2.3.14/lib/action_controller/failsafe.rb:26:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/lock.rb:11:in > `synchronize' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/lock.rb:11:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/lock.rb:11:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/actionpack-2.3.14/lib/action_controller/dispatcher.rb:106:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/rack/adapter/rails.rb:74:in > > `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /home/heroku_rack/lib/last_access.rb:15:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /home/heroku_rack/lib/static_assets.rb:9:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/urlmap.rb:47:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/urlmap.rb:41:in `each' > 2012-06-28T04:18:31+00:00 app[web.1]: > /home/heroku_rack/lib/date_header.rb:14:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/urlmap.rb:41:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /app/.bundle/gems/ruby/1.8/gems/rack-1.1.3/lib/rack/builder.rb:77:in `call' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/connection.rb:76:in > `pre_process' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/connection.rb:74:in > `catch' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/connection.rb:74:in > `pre_process' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/connection.rb:42:in > `receive_data' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/connection.rb:57:in > `process' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in > > `run_machine' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in > > `run' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/backends/base.rb:57:in > > `start' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/server.rb:156:in > `start' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/controllers/controller.rb:80:in > > `start' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/runner.rb:177:in > `send' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/runner.rb:177:in > `run_command' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/lib/thin/runner.rb:143:in > `run!' > 2012-06-28T04:18:31+00:00 app[web.1]: > /usr/ruby1.8.7/lib/ruby/gems/1.8/gems/thin-1.2.6/bin/thin:6 > 2012-06-28T04:18:31+00:00 app[web.1]: /usr/ruby1.8.7/bin/thin:19:in > `load' > 2012-06-28T04:18:31+00:00 app[web.1]: /usr/ruby1.8.7/bin/thin:19 >
