CODEWITHSUNDEEP
ruby-on-railsmongoidnewrelic
Bashar Abdullah
Bashar Abdullah

Reputation: 1545

New Relic causing uninitialized constant Mongoid::Collection (NameError)

After moving my Heroku app to Unicorn, New Relic stopped showing any reports except for deployments. I tried the solution suggested here: https://newrelic.com/docs/ruby/no-data-with-unicorn with no luck. I tried updating all gems, and now I get the error:

Exiting /Users/bashar/.rvm/gems/ruby-1.9.3-preview1@global/gems/rpm_contrib-2.1.11/lib/rpm_contrib/instrumentation/mongoid.rb:13:in block (2 levels) in <top (required)>': uninitialized constant Mongoid::Collection (NameError) from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:53:incall' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:53:in block in execute' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:52:ineach' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:52:in execute' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:19:inblock in detect!' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:17:in each' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/vendor/gems/dependency_detection-0.0.1.build/lib/dependency_detection.rb:17:indetect!' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/lib/new_relic/control/instrumentation.rb:93:in _install_instrumentation' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/lib/new_relic/control/instrumentation.rb:52:ininstall_instrumentation' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/lib/new_relic/control/instance_methods.rb:76:in init_plugin' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/newrelic_rpm-3.6.0.83/lib/newrelic_rpm.rb:40:inblock in ' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/initializable.rb:30:in instance_exec' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/initializable.rb:30:inrun' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/initializable.rb:55:in block in run_initializers' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/initializable.rb:54:ineach' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/initializable.rb:54:in run_initializers' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/application.rb:136:ininitialize!' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/railtie/configurable.rb:30:in method_missing' from /Users/bashar/rails-projects/myapp/config/environment.rb:5:in' from /Users/bashar/rails-projects/myapp/config.ru:7:in block in <main>' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/builder.rb:51:ininstance_eval' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/builder.rb:51:in initialize' from /Users/bashar/rails-projects/myapp/config.ru:1:innew' from /Users/bashar/rails-projects/myapp/config.ru:1:in <main>' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/builder.rb:40:ineval' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/builder.rb:40:in parse_file' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/server.rb:200:inapp' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/commands/server.rb:46:in app' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/server.rb:301:inwrapped_app' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/rack-1.4.1/lib/rack/server.rb:252:in start' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/commands/server.rb:70:instart' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/commands.rb:55:in block in <top (required)>' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/commands.rb:50:intap' from /Users/bashar/.rvm/gems/ruby-1.9.3-preview1/gems/railties-3.2.11/lib/rails/commands.rb:50:in <top (required)>' from script/rails:6:inrequire' from script/rails:6:in `'

I have the following gems in order:

gem 'rpm_contrib'
gem 'newrelic_rpm'
gem 'newrelic_moped'

I have had similar problem in the past when I upgraded to Mongoid 3, but back then the solution was newrelic_moped. Not this time it seems.

Any idea?

Upvotes: 3

Views: 684

Answers (1)

Rudi
Rudi

Reputation: 1587

I had the same. Add the code below to config/initializers/newrelic.rb:

# Ensure the agent is started using Unicorn.
# This is needed when using Unicorn and preload_app is not set to true.
# See https://newrelic.com/docs/ruby/no-data-with-unicorn
if defined? Unicorn
  ::NewRelic::Agent.manual_start()
  ::NewRelic::Agent.after_fork(:force_reconnect => true)
end

Upvotes: 0

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