In my case i have self-hosted server and worker on separate linux based VMs and i discovered that if i run a flow from the VM the flow finishes at the set_state call to the API (i have enabled debug logging for all Python loggers and i can see the API calls along with the flow logs). However if i run the exact same flow from my windows machine, there is one more call at the end that sends the logs to the API. This definitely looks like a configuration but i have PREFECT_LOGGING_TO_API_ENABLED set to True for both environments.

I have solved the issue but i am not 100% sure why it's happening, my suspicion is that the prefect logger was not initialized until the moment i called it (after which all logs appeared). If the following steps solve the issue for you as well i would suggest that it is a bug indeed. What i did (maybe not all steps are needed but this worked for me): • find if there is a logging.yaml file in the ~/.prefect directory and delete it (for me the file was in /home/user/.prefect/ • create a minimal flow with the following code and execute it directly in the python environment by calling python flow.py • note - the moment

print("Prefect logger handlers:", logging.getLogger("prefect").__dict__)

is called, the logger is created so play around with that and see if this actually solves the problem for you 🤞

import os
import logging, prefect
from prefect import flow, get_run_logger

# Configure Python logging globally
logging.basicConfig(
    level=<http://logging.INFO|logging.INFO>,  # capture DEBUG and above
    format="%(asctime)s | %(levelname)s | %(name)s | %(message)s"
)

from prefect.settings import PREFECT_API_URL, PREFECT_LOGGING_TO_API_ENABLED
print("Prefect:", prefect.__version__)
print("API URL:", PREFECT_API_URL.value())
print("Logging to API:", PREFECT_LOGGING_TO_API_ENABLED.value())
print("Prefect logger handlers:", logging.getLogger("prefect").__dict__)


@flow
def debug_env():
    # Get Prefect logger
    logger = get_run_logger()

    # Environment variables
    <http://logger.info|logger.info>(f"PREFECT_API_URL={os.environ.get('PREFECT_API_URL')}")
    <http://logger.info|logger.info>(f"PREFECT_LOGGING_TO_API_ENABLED={os.environ.get('PREFECT_LOGGING_TO_API_ENABLED')}")
    <http://logger.info|logger.info>(f"PREFECT_LOGGING_SETTINGS_PATH={os.environ.get('PREFECT_LOGGING_SETTINGS_PATH')}")

if __name__ == "__main__":
    debug_env()

I hope that this helps you and I'll be curios to hear what was the result for you.