Apscheduler clock process crashes every time

Question

I am creating a fairly straightforward little app, and am trying to use apscheduler to send a text to a user at a certain time. It works wonderfully locally, but the clock process, as specified in the Procfile, crashes every time. The only information I get is "Process exited with status code 0. State changed from up to crashed." when I run heroku logs -t -p clock.

My Procfile looks as follows:

web: uvicorn remind_me.main:app --host=0.0.0.0 --port=${PORT:-8000} clock: python remind_me/views/register.py

I also ran the heroku ps:scale clock=1 command.

The code for my "view" is below:

from apscheduler.schedulers.background import BackgroundScheduler
from dateutil.parser import parse`
                                              
sched = BackgroundScheduler({'apscheduler.timezone': 'EST'})

def scheduled_job(msg, number, carrier):
    send(msg, number, carrier)

@router.post('/')
@template()
async def home(request: Request): 
    vm = HomeViewModel(request)
    await vm.load()
    
    if vm.error:
        return vm.to_dict()

    msg, number, carrier, run_date = vm.task, vm.number, vm.carrier, vm.date_and_time
    run_date = parse(run_date)
    sched.add_job(scheduled_job, args=(msg,number,carrier), trigger='date', run_date=run_date)

    try:
       sched.start()
    except:
       pass

    db_storage.store_events(vm.name, vm.number, vm.carrier, vm.task, vm.date_and_time)
    return fastapi.responses.RedirectResponse(url="/", status_code=status.HTTP_302_FOUND)

I obviously left out some imports related to FastAPI and some stuff I was doing with the database, but I left those out for brevity. Everything works great locally, and all the pages work perfectly on Heroku, it's just that the clock process crashes every time.

I have also tried this with the blocking scheduler, but have had no luck, as that doesn't return and obviously I need the page to return/redirect.

I am wondering if it has something to do with the async aspect of the view itself, and if I might need to be APScheduler's async method (I can't remember its name offhand.). Any advice that you folks could give would be much appreciated. Thanks!

Apscheduler clock process crashes every time

0 Answers