Airflow: changing the crontab time for a DAG in Airflow

Question

I have a DAG that has been running everyday at 3:00, it ran OK for the past few weeks.

I've updated the date to run now at 7:00, but apparently for the last 2 days it didn't run. I can see the tasks for those two days with the status 'running' (in green), but no command is triggered.

Does one needs to do something more to change de running time of a DAG ?

I know that in the past one way to solve this was to clean in the meta-database the tasks for this DAG, and update the start_date, but I would rather avoid doing this again.

Anyone has a suggestion?

Answer 1

To schedule a dag, Airflow just looks for the last execution date and sum the schedule interval. If this time has expired it will run the dag. You cannot simple update the start date. A simple way to do this is edit your start date and schedule interval, rename your dag (e.g. xxxx_v2.py) and redeploy it.