问题
I have a Rails app running on heroku with Rufus Scheduler added on.
A 'once a day' task in the scheduler is running more often than once a day.
My guess would be something to do with the heroku app running on different dynos during the day, but I'm at a loss on how to confirm/fix the problem.
Has anyone else seen this/know of a solution?
Edit: I couldn't resolve the problem with the gem and have moved my app over to the heroku scheduler add on which does not experience this problem.
回答1:
The Heroku scheduler isn't guaranteed, it's only a simple scheduling system designed to fill a gap. It's nothing to do with your application moving between dynos as it's a seperate management system spinning up one of processes.
If timeliness is essential to you, take a look at clockwork, which will let you configure all sorts of stuff, but also give you a bit more reliability (at the expense of having a clock process running).
If this won't do - simply rework your job so that it doesn't matter how often it runs.
来源：https://stackoverflow.com/questions/9155895/rufus-scheduler-tasks-on-heroku-running-more-often-than-scheduled