Question

I cannot log messages from my delayed_job process. Here is the job that is being run.

class MyJob
  def initialize(blahblah)
    @blahblah = blahblah
    @logger = Logger.new(File.join(Rails.root, 'log', 'delayed_job.log'))
  end
  def perform
    @logger.add Logger::INFO, "logging from delayed_job"
    #do stuff
  end
end

I’ve tried various logging levels, and I have config.log_level = :debug in my environment configuration. I run delayed_job from monit. I’m using delayed_job 3.0.1 with ruby 1.9.3 and rails 3.0.10.

Answer 1

An explation could be that the job gets initialized only once on producer side. Then it gets serialized, delivered through the queue (database for example) and unserialized in the worker. But the initialize method is not being called in the worker process again. Only the perform method is called via send.

However you can reuse the workers logger to write to the log file:

class MyJob
  def perform
    say "performing like hell"
  end

  def say(text)
    Delayed::Worker.logger.add(Logger::INFO, text)
  end
end

Don’t forget to restart the workers.