Seeing a strange error when scaling up a prefect workflow ``

Question

Seeing a strange error when scaling up a prefect workflow ```File venv lib python3 8 site packages prefect orion orchestration rules py line 534 in aexit await self after transition exit context File venv lib python3 8 site packages prefect orion database dependencies py line 112 in async wrapper return await fn args kwargs File venv lib python3 8 site packages prefect orion orchestration core policy py line 190 in after transition cache key = validated state state details cache key AttributeError NoneType object has no attribute state details ``` Any idea how to debug interpret this

Kevin Kho · Answer

Did you try adding a cache key to a task

Anna Geller · Answer

< Jan Domanski> can you share an example code so that I can use to reproduce the issue hard to say anything about the root cause without seeing the flow code

Anna Geller · Answer

at a first glance it looks like some misconfiguration in the cache key function

Jan Domanski · Answer

Yeah i m not actually using a cache function or anything sophisticated like this

Jan Domanski · Answer

This is an ongoing issue we ve been seeing with a RayTaskExecutor

Jan Domanski · Answer

doesn t happen for a simple for loop and a prefect task but hits us in the face for anything non trivial will try to share a repo including an AWS ray yaml which seems needed

Zanie · Answer

cc < Dustin Ngo> we may have missed a race condition in the orchestration policy

Dustin Ngo · Answer

Thanks for the ping while doing some testing yesterday I saw this error for the first time recently too I ll look into this

Jan Domanski · Answer

Any luck with that < Dustin Ngo> the bug is still happening for us when slamming Prefect hard

Kevin Kho · Answer

Will ping Dustin tom to talk about this and let you know

Zanie · Answer

We haven t found it yet We re looking into it though