How To: Prevent a job from overlapping with itself

By default, a job will overlap with itself if its execution time takes longer than the scheduled interval it runs at. For example:

SCHEDULER.every '2s' do
  puts "Going to bed...zzz...."
  sleep(6)
  puts "Ok I'm done"
end

You can avoid this behaviour by passing the allow_overlapping: false argument to the SCHEDULER.

SCHEDULER.every '2s', allow_overlapping: false do
  puts "Going to bed...zzz...."
  sleep(6)
  puts "Ok I'm done"
end

Problem solved!