hello, I would like to prevent a DAG from scheduling / running concurrently whether by scheduler or if triggered externally (via airflow trigger_dag or UI).
I tried to set max_active_runs to 1 but i did not work for externally triggered case - airflow would still go ahead and execute multiple dag runs. I see this is done intentionally in dagrun_exists_dep.py: running_dagruns = DagRun.find( dag_id=dag.dag_id, state=State.RUNNING, *external_trigger=False,* session=session ) Is there any other way of forcing only one DAG run at the time? I am aware of depends_on_past=True but I use PythonBranch operators and that setting does not make sense in my case.
