We're trying to get a POC going on Prefect 2. We have our infra setup, but are having some issues running flows on task definitions. It seems like this is happening: • First run of a flow gets the following error

prefect_aws.ecs.TaskFailedToStart: Cannotpullcontainererror: ref pull has been retried 1 time(s): failed to copy: httpReadSeeker: failed open: unexpected status code <https://registry-1.docker.io/v2/prefecthq/prefect/blobs/sha256:209b7d3b67f9dca78847c83ea6f0a78b0f91672ea1ccedc00e9bd5eb46315807>: 400 Bad Request

• 2nd and subsequent runs of the same flow gets a different error:

Flow could not be retrieved from deployment. Traceback (most recent call last): File "<frozen importlib._bootstrap_external>", line 883, in exec_module File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed File "/opt/prefect/flows/atlan.py", line 5, in <module> from util import SnowflakeDestination File "/opt/prefect/flows/util.py", line 3, in <module> import pandas as pd ModuleNotFoundError: No module named 'pandas' The above exception was the direct cause of the following exception: ScriptError: Script at 'flows/atlan.py' encountered an exception: ModuleNotFoundError("No module named 'pandas'")

• it appears that Prefect is creating a new task definition but it is not derived from our agent and therefore does not have the same dependencies installed. How can we resolve this?

Could you clarify what you mean by "derived from our agent"?

Thanks for clarifying. I meant derived from our agent's image. I got an answer from support@prefect.io on this last night. If I understand it correctly, anytime a block's Task definition parameters differ from the agent's task definition parameters Prefect spins up a separate task definition. This then means that the new task definition may not have the needed dependencies. Did I get that right?