Possible recalculation of indicators

[moradology]

This morning, while Philly Bus data was running, the job was apparently reinitialized - I'm writing this issue so that we can keep an eye out for a potentially nasty bug. Comment here if you have any ideas about what it might be or conditions for duplication.

[notthatbreezy]

There is some retry logic in the celery task that kicks off indicator calculations, that would be the first place to look I think. Sounds like it was not calculating long enough for the job to time out (which it will do after something like 3 hours if it is still not marked complete by then I think).