Hey folks 👋 We are experiencing an interesting behaviour with Prefect 1.4.0 and flows that run with ECSRun config on an ECS Agent. When a flow is cancelled, either from the UI or by calling

client.cancel_flow_run

, it seems the ECS task of the flow run is not stopped and stays in the Running state indefinitely. Has anyone experienced such behaviour? Is this expected or not? Thanks!

Experiencing this as well. Did you manage to get a reply elsewhere or find a solution @ale?

Hey @Dylan 👋 We ended up raising an

ENDRUN

signal instead of calling

client.cancel_flow_run

By doing this, Prefect is able to decommission the ECS task of the flow properly

Hi @ale, thanks for replying. Glad you managed to find a workaround. I'm wondering if I can achieve the same with Prefect 2.8, preferably through the API. I'm unfamiliar with signals, do you have a link to any Prefect documentation? Struggling to find it in here - https://docs.prefect.io/2.10.7/api-ref/prefect/client/base/

Hey @Dylan I’m not sure signals exist in Prefect 2.x And I don’t have much experience with Prefect 2.x, so I suggest you to ask in #prefect-community 😊

Gotcha, thanks Ale

You’re welcome 😊