updated from http://stackoverflow.com/questions/1276164/how-do-i-integrate-hoptoad-with-delayedjob-and-daemonspawn

delayed job and hoptoad.rb

class Delayed::Worker
  def handle_failed_job_with_hoptoad(job, error)
    HoptoadNotifier.notify(error)
    handle_failed_job_without_hoptoad(job, error)
  end

  alias_method_chain :handle_failed_job, :hoptoad
end