[BUG] @repeat_every blocks app startup on version 0.6.0

[jonathanhar]

Describe the bug
On version 0.2.1 there is no problem, but when using 0.6.0 the app doesn't start. Attaching simple code to reproduce

To Reproduce

import logging
from contextlib import asynccontextmanager

import uvicorn
from fastapi import FastAPI
from fastapi_utils.tasks import repeat_every

logging.basicConfig(level=logging.INFO, force=True)
logger = logging.getLogger(__name__)


@asynccontextmanager
async def lifespan(app: FastAPI):
    await do_something()
    yield


app = FastAPI(lifespan=lifespan)


@repeat_every(seconds=1, logger=logger)  # 30 Minutes
async def do_something() -> None:
    logger.info("Removing idle devcontainers...")
    return


@app.get("/")
async def health():
    return 'Success'


if __name__ == "__main__":
    uvicorn.run(app, host="localhost", port=8080)

Expected behavior
App should start

Environment:

• OS: Tested on Linux and Windows
• FastAPI Utils version 0.6.0
• Python version 3.11

[dwdSF]

++, the app does not start. It also seems that the option wait_first does not work in 0.6.0

[Vanderhoof]

Mommy always told me: lock your dependencies. But I never listened to her. Now I lost several hours on a deadline week figuring out why the server is not starting.
This is very unfortunate, but a life lesson nevertheless

[IgnacioHeredia]

Same issue here.

    from fastapi_utils.tasks import repeat_every
  File "/home/iheredia/anaconda3/lib/python3.8/site-packages/fastapi_utils/__init__.py", line 4, in <module>
    from .cbv_base import Api, Resource, set_responses, take_init_parameters
  File "/home/iheredia/anaconda3/lib/python3.8/site-packages/fastapi_utils/cbv_base.py", line 5, in <module>
    from .cbv import INCLUDE_INIT_PARAMS_KEY, RETURN_TYPES_FUNC_KEY, _cbv
  File "/home/iheredia/anaconda3/lib/python3.8/site-packages/fastapi_utils/cbv.py", line 21, in <module>
    from typing_inspect import is_classvar
ModuleNotFoundError: No module named 'typing_inspect'

[jonesbusy]

Same issue. My app doesn't start after update to 0.6.0

[ollz272]

Same here, needs fixing asap

[mgkid3310]

Same here, and during my struggle to fix the issue I found that the typing_inspect module's imported within fastapi-restful but it's not listed as a dependency so it has to be installed separately via pip. Would that be worth a separate issue/PR?

[juanggcc]

This issue broke all my apps that relied on fastapi-utils for cron. Really need to start locking my dependencies.

[mgkid3310]

Seems like await (https://github.com/dmontagu/fastapi-utils/blob/master/fastapi_utils/tasks.py#L77) is the cause of the problem, it should be asyncio.ensure_future or Thread().start()

[Keiishu]

I just tested replacing (https://github.com/dmontagu/fastapi-utils/blob/master/fastapi_utils/tasks.py#L77) with asyncio.ensure_future(loop()) and it works. Every test passes as well for me. (https://github.com/Keiishu/fastapi-utils/tree/fix/tasks-blocking)

[ollz272]

@Keiishu can you raise a PR?

[Keiishu]

@ollz272 Sure! Here it is: #308