Background tasks cancelled

[csuriano23]

Hi there,
I've seen some closed bugs in Starlette project (eg. #1438) on the issue of background tasks being cancelled, but I'm not sure if the problem is definitely solved in starlette 0.21.

Anyway I'am experimenting a similar issue.

I run running a starlette background task from a FastAPI/Strawberry server, something like:

                info.context["background_tasks"].add_task(
                    my_task, *my_args
                )

The background task performs some AIOHTTP requests on other servers (and it is quite slow in fact). The wrapping client of AIOHTTP is NIO which I actually use in the background task.

When executing the function inside the request I have no issues, but when calling it as a bg task I receive the famigerous 'asyncio.exceptions.CancelledError'. I've also tried upgrading Starlette to the latest version.

Any clues on that?

[Kludex]

This was fixed in Starlette 0.21.0.