Cannot startup fastapi with apm

With start apm in docker, I just set up agent in fastapi. Then I run app with uvicorn, it hangs. To Reproduce

1. Start Service with docker compose Reference

• Test apm status

1. Run the following simple FastAPI app:

from fastapi import FastAPI
from elasticapm.contrib.starlette import make_apm_client, ElasticAPM
import uvicorn


apm = make_apm_client({'SERVICE_NAME': 'test', 'SERVER_URL': 'http://0.0.0.0:8200'})
app = FastAPI()
app.add_middleware(ElasticAPM, client=apm)


@app.get("/")
def read_root():
    return {"Hello": "World"}


if __name__ == '__main__':
    uvicorn.run(app, host='0.0.0.0', port=8000)

• Result

Environment

• OS: Mac
• Python version: 3.7.10
• Framework and version: fastapi==0.66.0
• APM Server version: image: docker.elastic.co/apm/apm-server:7.13.2
• Agent version: elastic-apm==6.3.0

[beniwohli]

Hi @alexcc4! Thanks for opening the issue and providing a test case! I opened a PR with a fix in #1185. We’ll make a release with this fix ASAP!

[alexcc4]

@beniwohli OK~