gistfile1.rb

# config/initializers/delayed_job_mongoid.rb
module Delayed
  module Backend
    module ActiveRecord
      class Job < ::ActiveRecord::Base
        def self.before_fork
          ::ActiveRecord::Base.clear_all_connections!
          ::Mongoid.master.connection.close
        end

        def self.after_fork
          ::ActiveRecord::Base.establish_connection
          ::Mongoid.master.connection.connect
        end
      end
    end
  end
end