<@ULVA73B9P> I'm running a flow that calls run_dep...
# ask-marvin
m
@Marvin I'm running a flow that calls run_deployment for each date in a date range. I've specified a unique flow_run_name for each (using the current date I'm processing). I received the following warning: " UserWarning: A task named 'workflow-name/deployment-name' and defined at '/redacted/venv/lib/python3.10/site-packages/prefect/deployments/deployments.py:151' conflicts with another task. Consider specifying a unique
name
parameter in the task definition:" None of the other tasks or subflows in the deployment I'm running have custom names, so I assume they'd use Prefect's unique name generator for their runs. Is there another name that I need to specify for each run to avoid this error?
m
The warning you're encountering is likely related to the fact that the
run_deployment
utility might reuse a task name that is stored somewhere else in your Prefect setup. This can happen especially if multiple runs or tasks are defined with the same name or if there's a task name conflict from different Prefect libraries being used at the same time. In the issue Suppress the warning on the `run_deployment` utility: `UserWarning: A task named 'flow/deploy' and defined at '...prefect/deployments.py:100' conflicts with another task.`, it's mentioned that this warning can cause confusion because
run_deployment
is not considered a task. The proposal suggests suppressing that warning. In general, when defining tasks in Prefect, it's essential to ensure that each task has a unique name if you expect to have multiple instances of it running at the same time or if you wish to avoid such warnings. In the absence of a clear-cut solution or workaround from the issues, if you continue to encounter this warning, consider explicitly naming your tasks using the
name
parameter within the
@task
decorator or the
Task
constructor to avoid name conflicts. This is particularly recommended when using libraries that may define tasks with generic names that could conflict with one another. Moreover, it's also possible that a future update to Prefect could address this warning by suppressing it or providing a more transparent way to handle task naming conflicts. Stay tuned for updates in the Prefect changelogs or release notes for any developments on this matter.