class FaxFetchWorker
  include Sidekiq::Worker
  sidekiq_options :retry => false

  def perform(job_id=0)
    logger.warn "perform is invoked."

    FaxSource.all.each do |source|
      ...
    end
  end
end

获取错误Errno :: EIO：输入/输出错误 – < STDOUT>在第6行