Many 'Unitialized constant' errors on Rails production

[brauliobo]

When running the app on development, everything works as expected. But then I run the app on production and I see many Unitialized constant Somenamespace::Someclass errors. I can see the paths for constants are added to $: and config.autoload_paths (from rails).

I'm using rails 3.2.21.
The same situation works fine with ruby 2.2.0.

[brauliobo]

It is surely related to config.threadsafe!. Tried http://deploymentzone.com/2012/06/08/jruby-on-rails-and-uninitialized-constant-in-production/ without success.

[brauliobo]

Sorry, the problem is that config.threadsafe! sets config.dependency_loading = false