Even if Heroku is working 100% normally and your code is working 100% normally, your jobs will get killed. The workers get SIGTERM'ed once per day minimum as d

Even if Heroku is working 100% normally and your code is working 100% normally, your jobs will get killed. The workers get SIGTERM'ed once per day minimum as dynos cycle. The more workers you have in flight on average, the more you will see this. The best thing to do is make your jobs retriable, meaning they are idempotent or otherwise can pick up where they left off. Then use resque-retry to have them automatically retry. That's what we've done, and now the only failed jobs we get are legit issues and not Heroku