v0.22.0 on Windows 10 took minutes to reload

[adhihargo]

Uvicorn used to work fine in my dev laptop running Windows 10, but now every time there's a modified change, it stuck in this line:

WARNING: WatchFiles detected changes in 'main.py'. Reloading...

... for nearly 5 minutes before actually reloading the files (printing Shutting down in the next line, etc.). During that time, the API server part works normally but serving the older version before file modification..

Downgraded to v0.21.1, and reloading works instantly again.

[3to1null]

I have the exact same issue. Upgrading to v0.22.0 makes reloading take ages, even with timeout_graceful_shutdown=1. Using a FastAPI lifespan context manager, I do not get to the shutdown event. This happens on my laptop running Windows 11 even with something as small as:

from contextlib import asynccontextmanager

import uvicorn
from fastapi import FastAPI


@asynccontextmanager
async def lifespan(app: FastAPI):
    yield
    print("test123") # <-- We only get here after minutes of waiting


app = FastAPI(lifespan=lifespan)
if __name__ == "__main__":
    uvicorn.run("module:app", reload=True, timeout_graceful_shutdown=1)

[Kludex]

• I've created Slow reload on Windows 10 using PyCharm #2000 from this discussion.

[3to1null]

Wow! Quick response! Is there any information that I could provide that might help narrowing this issue down?

[Kludex]

Yes. You can check the 2 PRs related to Windows that were merged for 0.22.0, try to revert in a branch, and use that branch locally and see if it solves the problem.

[trim21]

Find this also happens in powershell in windows terminal, too