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When I cancel the workflow in Prefect cloud, it is not stopping the task in ECS, Is there a way to do that, probably in ECS task block configuration?

Is your ECS worker / agent running? It is responsible for stopping the task

You should be able to see logs on the agent regarding the cancellation

<@U01CEUST9B5> this could be a dumb question but is ECS agent different from Prefect agent?

Nope, sorry. There’s an “ECS Worker” that only runs flows on ECS that is replacing the “Prefect agent” which can run flows anywhere.

If you’re using the agent, then thats the place to look.

I'm sorry I still couldn't follow you, I have a prefect agent which deploys a workflow as ECS task, and also an automation which is cancelling the workflow after running for more than 8 hrs. In my Prefect cloud it shows cancelled but that is not stopping the ECS task in AWS