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pythonpython-3.xapscheduler

Blocking scheduler(apscheduler) cannot get the job list before starting

I am unable to get the job list before I start blockingscheduler, I already have a job with id as

background_event_publisher

Now when I try to add -

jobstores = {
        'default': SQLAlchemyJobStore(url=os.environ.get("SQLALCHEMY_DATABASE_URI", None))
    }
scheduler = BlockingScheduler(
        daemon=True, jobstores=jobstores, timezone=pytz.utc)
scheduler.get_jobs()

Gives

[]

Then

scheduler.add_job(fun, 'cron', hour='09', minute='30',
                                   id='background_event_publisher' , misfire_grace_time=3600)
scheduler.start()

Gives Error

apscheduler.jobstores.base.ConflictingIdError: 'Job identifier (background_event_publisher) conflicts with an existing job

Can't understand why are not getting anything in get_jobs() while it still exists.

Solution

  • Before the scheduler has started, it only sees jobs tentatively added to it. It cannot access the job store because the job store is only initialized during scheduler initialization. If you need to just retrieve such information without actually running the scheduled jobs, you should start the scheduler in paused state (scheduler.start(paused=True)).