Unregister stale resque workers

unregister-scale-resque-workers.rb

Resque.workers.each do |w|
  matches = w.id.match(/^[^:]*:([0-9]*):[^:]*$/)
  pid = matches[1]
  is_real = w.worker_pids.include?(pid.to_s)
  unless is_real
    puts "unregister_worker pid=#{pid}" 
    w.unregister_worker
  end
end; nil