Use thread pool scheduler

actioner/main.py

@@ -5,7 +5,7 @@ import sentry_sdk
 from aiohttp.web import run_app as run_web_app
 from sentry_sdk.integrations.aiohttp import AioHttpIntegration
 
-from actioner.scheduler import create_scheduler, start_scheduler
+from actioner.scheduler import create_scheduler
 from actioner.settings import LOGGING_LEVEL, SENTRY_DSN
 from actioner.web import get_server
 
@@ -20,7 +20,7 @@ def main():
 
     # HACK: APScheduler doesn't like running in an external event loop. https://github.com/agronholm/apscheduler/issues/360
     Process(target=run_web_app, args=(server,)).start()
-    Process(target=start_scheduler, args=(scheduler,)).start()
+    Process(target=scheduler.start).start()
 
 
 if __name__ == "__main__":

actioner/scheduler/__init__.py

@@ -1,6 +1,7 @@
 import asyncio
 
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
+from apscheduler.schedulers.blocking import BlockingScheduler
 from apscheduler.triggers.interval import IntervalTrigger
 
 from .todoist_assigned_issues import todoist_assigned_issues
@@ -8,7 +9,7 @@ from .todoist_repo_prs import todoist_repo_prs
 
 
 def create_scheduler():
-    scheduler = AsyncIOScheduler()
+    scheduler = BlockingScheduler()
     scheduler.add_job(todoist_assigned_issues, "interval", minutes=15)
     scheduler.add_job(todoist_repo_prs, "interval", minutes=15)
 
@@ -17,8 +18,3 @@ def create_scheduler():
             scheduler.add_job(job.func)
 
     return scheduler
-
-
-def start_scheduler(scheduler):
-    scheduler.start()
-    asyncio.get_event_loop().run_forever()