I am having an issue using it on heroku

[henrylily120]

It works just fine locally, but when I deployed it on heroku, it gave me this error. Any assistance is appreciated.

-11-06T08:47:19+00:00 app[web.1]: [2012-11-06 08:47:19] ERROR SignalException: SIGTERM
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:29:in `<top (required)>'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract/api.rb:26:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract/api.rb:26:in `<top (required)>'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract-ocr.rb:35:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract-ocr.rb:35:in `<top (required)>'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:68:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:68:in `block (2 levels) in require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:66:in `each'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:66:in `block in require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:55:in `each'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler/runtime.rb:55:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/bundler-1.2.1/lib/bundler.rb:128:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/config/application.rb:7:in `<top (required)>'
2012-11-06T08:47:22+00:00 app[web.1]: /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/compilers/gcc.rb:29:in `compile': compile error: see logs at /tmp/.ffi-inline-16878/85aad7364f11885370e58c4391df70e29ef22bbe.log (CompilationError)
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.8/lib/rails/commands.rb:53:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.8/lib/rails/commands.rb:53:in `block in <top (required)>'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/builders/c.rb:114:in `shared_object'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/builders.rb:90:in `block in build'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/builders.rb:87:in `instance_eval'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/builders.rb:87:in `build'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/inline.rb:54:in `singleton_inline'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/ffi-inline-0.0.4/lib/ffi/inline/inline.rb:39:in `inline'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:34:in `<module:C>'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/tesseract-ocr-0.1.5/lib/tesseract/c.rb:31:in `<module:Tesseract>'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.8/lib/rails/commands.rb:50:in `tap'
2012-11-06T08:47:22+00:00 app[web.1]:   from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.8/lib/rails/commands.rb:50:in `<top (required)>'
2012-11-06T08:47:22+00:00 app[web.1]:   from script/rails:6:in `require'
2012-11-06T08:47:22+00:00 app[web.1]:   from script/rails:6:in `<main>'
2012-11-06T08:47:23+00:00 heroku[web.1]: Process exited with status 1
2012-11-06T08:47:23+00:00 heroku[web.1]: State changed from starting to crashed
2012-11-06T08:47:23+00:00 heroku[web.1]: State changed from crashed to starting
2012-11-06T08:47:29+00:00 heroku[web.1]: Error R12 (Exit timeout) -> At least one process failed to exit within 10 seconds of SIGTERM
2012-11-06T08:47:29+00:00 heroku[web.1]: Stopping remaining processes with SIGKILL
2012-11-06T08:47:30+00:00 heroku[web.1]: Process exited with status 137
2012-11-06T08:48:30+00:00 heroku[web.1]: State changed from starting to crashed
2012-11-06T08:48:33+00:00 heroku[router]: Error H10 (App crashed) -> GET stark-ocean-3271.herokuapp.com/ dyno= queue= wait= service= status=503 bytes=
2012-11-06T08:48:34+00:00 heroku[router]: Error H10 (App crashed) -> GET stark-ocean-3271.herokuapp.com/favicon.ico dyno= queue= wait= service= status=503 bytes=

[meh]

It needs GCC and to compile stuff, I think you can't do that on Heroku.

[meh]

Now that I think of it, it could be an issue with writing to /tmp.

Do you know where you can write temporary files on Heroku?

[henrylily120]

I tried writing a file to /tmp and it seemed to work fine.
Chutikas-MacBook-Pro:think_dirty_rails numnym$ heroku run "cp config.ru /tmp/config.ru | cat /tmp/config.ru"
Running cp config.ru /tmp/config.ru | cat /tmp/config.ru attached to terminal... up, run.1

This file is used by Rack-based servers to start the application.

require ::File.expand_path('../config/environment', FILE)
run ThinkDirtyRails::Application

GCC is also available on Heroku as well.
Chutikas-MacBook-Pro:think_dirty_rails numnym$ heroku run gcc
Running gcc attached to terminal... up, run.1
gcc: no input files

I also saw this error message....
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/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5

[meh]

It looks like the process has been killed by a supervisor, it could have used too much processor or something like that, you should contact Heroku and ask for clarification.

[henrylily120]

Have you got any experiences deploying it to another platform like AWS?

[meh]

No, sorry.

[henrylily120]

Can you please let me know which platforms you had luck with?

[Eunoia]

@henrylily120 Heroku will not let a request run longer than a 30 seconds. You can get around this by pushing your OCR task off a queue like Resque or SideKiq. I ran into a similar issue with running some AI code on Heroku.

Feel free to ask any questions about how to use workers on Heroku.

[leoromanovsky]

@henrylily120 How were you able to get it to run on Heroku?

[Eunoia]

@leoromanovsky Heroku wont let you use tesseract on a web dyno. You will need to use tesseract in a worker dyno.

[leoromanovsky]

@Eunoia Hey yep, I got that part and am ready to use Sidekiq. I'm actually having trouble and running into a compilation error during the deploy. Any guidance there?

[Eunoia]

I sent you an email, lets remember to share the results here.

[leoromanovsky]

@Eunoia and I chatted offline. We tried going back to ffi-inline version 1.9.0 without any luck. The take-away was to try and get my sidekiq workers running on EC2 instead of Heroku.