Comment 5 for bug 609402

My original plan was to wait until upstart grew support to conditionally start on jobs (only if they exist) which is supposed to hit on the next version.

Your solution does sound like a good contingency plan though. I would be quite open to a patch. I have two recommendations for it however:
1) make sure it sleeps in between tries
2) make sure that it times out eventually (after a few minutes or so) by causing the job to exit some non zero value. No use in continuously running the job if it's eventually going to fail anyway.