Hello in prefect 1 0 what can lead a flow s mapped task to j

Question

Hello in prefect 1 0 what can lead a flow s mapped task to just immediately move to the finished state of `Mapped` with no mapped tasks being created and then to the flow itself just immediatley moving to the `Failed` stated even though nothing failed

Tom Klein · Answer

nothing failed mapped tasks never actually created

Tyson Chavarie · Answer

I just had this same issue I was using create markdown artifact in my mapped task and when I disabled it my child tasks started as expected

Tyson Chavarie · Answer

The error I was getting was `prefect exceptions ClientError path create task run artifact message Task run lt task id gt not found extensions code INTERNAL SERVER ERROR ` 2022 08 17 17 30 35+0000 ERROR prefect CloudTaskRunner | Task extract postgres table 4 Exception encountered during task execution

Tom Klein · Answer

I did not use any create markdown Also just replaced the mapped task with one that does nothing but write some logs now the flow succeeds but still no child tasks execute Also did not get any explicit error And finally this entire flow worked earlier today with the same exact code

Tom Klein · Answer

Sounds to me like some kind of issue in the cloud

Tyson Chavarie · Answer

yeah I think so it just started happening to me today on code that has been in prod for weeks

Tyson Chavarie · Answer

but same thing no error just says mapped but no child tasks actually showed up etc I got the error by running prefect agent in debug no errors in the UI at all

Tyson Chavarie · Answer

UPDATE removing create markdown artifact resolved the ERROR but my child tasks are still not running I don t see them in the UI

Bianca Hoch · Answer

Hello This has been raised to our engineers internally and we are taking a look at what could be causing this issue

Bianca Hoch · Answer

Thanks for raising this

Tom Klein · Answer

< Bianca Hoch> ty

Bianca Hoch · Answer

Hello everyone just received notice that the incident has been resolved Please let us know if this comes up again

Tom Klein · Answer

< Bianca Hoch> thx appreciate the quick response and update

Tyson Chavarie · Answer

child tasks thanks < Bianca Hoch>