Question

I implemented a delayed job in my Rails application, following the instructions.

1. I start the Rails app
2. I click on a link that launches the delayed job
3. The job is visible in the database’s delayed_jobs table
4. I run rake jobs:work
5. The job disappears from the table, so I guess the job has been performed
6. BUT PROBLEM: /tmp/job.log has not been written (what the job should have done)

The job:

class CsvImportJob
  def perform
    File.open('/tmp/job.log', 'w') {|f| f.write("Hello") }
  end
end

The call:

job = CsvImportJob.new
job.delay.perform

Nothing in the logs.
The rake jobs:work terminal says nothing after its start message:

[Worker(host:nico pid:25453)] Starting job worker

Nothing happen either when I launch the job while rake jobs:work is running.

In contrast, when the line "hello".delay.length is executed, delayed_jobs processes it and a message String#length completed after 0.0556 - 1 jobs processed at 3.6912 j/s, 0 failed does appear.

Answer 1

See https://github.com/collectiveidea/delayed_job/wiki/Common-problems#wiki-undefined_method_xxx_for_class in documentation.

Even delayed_job author don’t know the reason. It somehow depends on the webserver you run in on. Try the wiki’s recommendation.

See also delayed_job: NoMethodError