statsd logging does not work in UvicornWorker and does not throw any error

[tim-gb]

Describe the bug In my application, I deploy a FastAPI app to my kubernetes pod, and I have a datadog agent set up in the cluster. When I exec into my pod and start a REPL, I can do statsd.set no problem, and find my metric on datadog metric explorer. My app has the following structure:

• main.py -- the main application code
• start.py -- pre-setup before launching application, then launching application by running

  launch_cmd = f"""gunicornmain:app -k uvicorn.workers.UvicornWorker \
  --bind 0.0.0.0:8006 \
  --workers 4 \
  --access-logfile - --access-logformat '%(t)s %(p)s %(m)s %(U)s' \
  --timeout 600"""
  subprocess.call(launch_cmd, shell=True)

When I run statsd.set("example_metric", 1) in start.py, I can see metrics successfully logged. When I run statsd.set("example_metric", 1) in main.py, I don't see my metric showing up, and there are no errors.

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To Reproduce Steps to reproduce the behavior:

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4. See error

Expected behavior Metrics should show up on metrics explorer, or stastd should throw error when it fails.

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Environment and Versions (please complete the following information): A clear and precise description of your setup:

• version for this project in use.
• services, libraries, languages and tools list and versions.

datadog==0.49.0 fastapi==0.111.1 uvicorn==0.30.3 gunicorn==20.1.0

Additional context I tried comparing all my environment variables by dumping them in start.py and in main.py, and they are the same.

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