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Mark McDonald

12/08/2020, 3:16 PM
Hi - we're seeing some duplicate scheduled flow runs in Prefect cloud. For example, this flow is supposed to run once a day, but we're getting duplicates.
as far as I know this problem just started this morning. It's not impacting all of our flows, but a subset of them.
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Jim Crist-Harif

12/08/2020, 3:18 PM
Thanks for the report Mark, I'll flag this and follow up with our cloud team.
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Chris White

12/08/2020, 5:34 PM
Hey @Mark McDonald - could you share a Flow Run ID for one of the duplicated runs, maybe
cuddle-pony
?
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Mark McDonald

12/08/2020, 5:37 PM
sure! here you go - scheduled duplicate flow runs: aa3bfb9d-60cc-4c49-8605-0db385735e97 (outgoing-civet) 268d0fe0-8ca6-415d-84b2-36173aa5bfde (capable-horse)
👍 1
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Chris White

12/08/2020, 6:15 PM
interesting, I’m not seeing any duplicates for this flow id (
a15ea4fb-4085-42a1-aa1f-43f6ec0df734
). The two IDs you provided have distinct scheduled start times: - outgoing-civet: “2020-12-09T120000+00:00” - capable-horse: “2020-12-10T120000+00:00"
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Jim Crist-Harif

12/08/2020, 6:17 PM
Perhaps you got two from different days - may want to compare a duplicate, perhaps
cuddle-pony
and
dark-chinchilla
?
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Chris White

12/08/2020, 6:25 PM
i couldn’t find those for that flow ID; I even searched across all runs for the flow group and I couldn’t find any with those names
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Mark McDonald

12/08/2020, 8:59 PM
sorry for the slow response!
it looks like our team redeployed their flows and now the issue has gone away
👀 1
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Chris White

12/08/2020, 9:26 PM
Very very interesting, thanks for digging this example up - I don’t have a full story for exactly how this occurred, but on the bright side I believe I do understand how to fix it! It might take a few days to get out the door but I’ll let you know as it progresses
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Mark McDonald

12/08/2020, 9:29 PM
thanks, Chris
@Chris White - we haven't noticed this issue with duplicate flow runs in the past day or so. Will you confirm whether it's resolved on your end?
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Chris White

12/11/2020, 4:13 PM
Hey @Mark McDonald - yes, apologies for not following up sooner; we released the fix early yesterday!
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Mark McDonald

12/11/2020, 4:19 PM
awesome. thanks!
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