ruby-on-rails deployment heroku production-environment unicorn

Issue with Unicorn Deploy to Heroku - production environment issues only

I'm having problems deploying to Heroku. Everything works fine on my development machine (I'm using Foreman/Unicorn to run the web worker and background DelayedJob process). However when I try to run in Production on Heroku, I get strange errors about logger...

app error: undefined method `tagged' for #<Logger:0x00000005aee368> (NoMethodError)
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/rack/logger.rb:14:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.1/lib/action_dispatch/middleware/request_id.rb:22:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/methodoverride.rb:21:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/runtime.rb:17:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.1/lib/active_support/cache/strategy/local_cache.rb:72:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rack-1.4.1/lib/rack/lock.rb:15:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/actionpack-3.2.1/lib/action_dispatch/middleware/static.rb:53:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.1/lib/rack/cache/context.rb:132:in `forward'
/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.1/lib/rack/cache/context.rb:241:in `fetch'
/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.1/lib/rack/cache/context.rb:181:in `lookup'
/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.1/lib/rack/cache/context.rb:65:in `call!'
/app/vendor/bundle/ruby/1.9.1/gems/rack-cache-1.1/lib/rack/cache/context.rb:50:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/engine.rb:479:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/application.rb:220:in `call'
/app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.1/lib/rails/railtie/configurable.rb:30:in `method_missing'
/app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:530:in `process_client'
/app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:604:in `worker_loop'
/app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:487:in `spawn_missing_workers'
/app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/lib/unicorn/http_server.rb:137:in `start'
/app/vendor/bundle/ruby/1.9.1/gems/unicorn-4.2.0/bin/unicorn:121:in `<top (required)>'
/app/vendor/bundle/ruby/1.9.1/bin/unicorn:19:in `load'
/app/vendor/bundle/ruby/1.9.1/bin/unicorn:19:in `<main>'

The confusing part is that it the error trace is all gem code... maybe something wrong with my unicorn / proc file?

Unicorn:

worker_processes 3 # amount of unicorn workers to spin up
preload_app true
timeout 30         # restarts workers that hang for 30 seconds

@delayedjob_pid = nil

before_fork do |server, worker|
  @delayedjob_pid ||= spawn("bundle exec rake environment jobs:work QUEUE=immediate")
end

after_fork do |server, worker|
  ActiveRecord::Base.establish_connection
end

Proc:

web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb

I can post whatever else would be useful!!! Thanks in advance...

Solution

Turns out that Heroku does not currently get along well with Rails 3.2, and custom logging.

What fixed my issue - comment out the following:

 #config.log_tags = [:uuid, :remote_ip]