We're running all our flows via ECSRun to kick off a Fargate task to run the flow. It all works fine but what I'm seeing are a lot of Fargate zombie tasks still running after the flow has finished. I need to investigate this a little more as it may be failed flows and/or flows we cancel via the Prefect console... not sure at this stage. Has anyone else had a similar issue? (a quick search of this channel didn't reveal much). Many thanks!

Hi @Theo Platt, are the Flows finished in the Prefect UI? Not ECS specific but I have seen Docker connections fail to close because of connections to databases that are still open. Do you think you can have something like that?

Thanks @Kevin Kho. Yes - the flows are either cancelled, successful or failed. We're going to do some more digging to see if we can replicate the issue.

I don’t think it’s related, but just wanted to put this on your radar also

I think it may be related. We have been cancelling a lot of flows.

But I guess it also happened for Failed flows which is why I’m not too sure. I am not too sure but I see this more on k8s rather than ECS. Could be related though.

I need to confirm the failed flows - may not be the case for them - may just be cancelled flows

See updates here: https://prefect-community.slack.com/archives/CL09KU1K7/p1646338502087159