Dear all while the flow was running perfectly before and sti

Question

Dear all while the flow was running perfectly before and still runs locally I suddenly get an error that seems to be related to pickle when running it on cloud `TypeError can t pickle thread lock objects` See full error message below Any ideas what could be the reason

nicholas · Answer

Hi < Robin> could you delete your stack trace and put it in this thread instead

Robin · Answer

I get the following error in the DEBUG level logging after a message saying `Checking flow run state `

nicholas · Answer

Thanks < Robin> it looks like this might be a bug on the Core side would you mind opening a ticket with a short description of what version of Core you re on and when this stacktrace arose

Robin · Answer

Robin · Answer

PS Turns out the error does not occur when switching back to another feature branch of our own code repository Hence the error might be related to a code change on our side The current assumption on our side is that we might pass an open connection or something else that is not pickable between tasks

nicholas · Answer

< Robin> that s definitely possible as well if you find out more could you update your issue I m sure others have run into this as well when trying to pass around connections

Robin · Answer

OK will update on GitHub slightly smiling face

nicholas · Answer

Thanks < Robin> much appreciated smile

Robin · Answer

It was indeed related to open connection wink So always to all prefect users make sure to close teardown dispose all open connections slightly smiling face