zammad/app/jobs/application_job.rb

class ApplicationJob < ActiveJob::Base
  include ApplicationJob::HasDelayedJobMonitoringCompatibilty
  include ApplicationJob::HasQueuingPriority
  include ApplicationJob::HasCustomLogging

  # Automatically retry jobs that encountered a deadlock
  # retry_on ActiveRecord::Deadlocked

  # Most jobs are safe to ignore if the underlying records are no longer available
  # discard_on ActiveJob::DeserializationError
end