mik-laj edited a comment on issue #6954: [AIRFLOW-4355] removed task should not lead to dagrun success URL: https://github.com/apache/airflow/pull/6954#issuecomment-571398463 It works for me. ```python @conf_vars({ ('scheduler', 'removed_tasks_lead_to_dagrun_failure'): 'True' }) def test_dagrun_removed_tasks_lead_to_dagrun_failure_true(self): session = settings.Session() on_failure_callback = mock.MagicMock() dag = DAG( 'test_dagrun_removed_tasks_lead_to_dagrun_failure_true', start_date=DEFAULT_DATE, default_args={'owner': 'owner1'}, on_failure_callback=on_failure_callback ) dag.clear() with dag: op1 = DummyOperator(task_id='A') op2 = DummyOperator(task_id='B') op2.set_upstream(op1) dag.clear() now = timezone.utcnow() dr = dag.create_dagrun(run_id='test_dagrun_deadlock', state=State.RUNNING, execution_date=now, start_date=now) ti_op1 = dr.get_task_instance(task_id=op1.task_id) ti_op1.set_state(state=State.REMOVED, session=session) ti_op2 = dr.get_task_instance(task_id=op2.task_id) ti_op2.set_state(state=State.SUCCESS, session=session) del dag.task_dict[ti_op1.task_id] dr.update_state() self.assertEqual(dr.state, State.FAILED) kall = on_failure_callback callback_context = kall.call_args[0][0] self.assertEqual('removed_tasks', callback_context['reason']) @conf_vars({ ('scheduler', 'removed_tasks_lead_to_dagrun_failure'): 'False' }) def test_dagrun_removed_tasks_lead_to_dagrun_failure_false(self): session = settings.Session() on_failure_callback = mock.MagicMock() dag = DAG( 'test_dagrun_removed_tasks_lead_to_dagrun_failure_false', start_date=DEFAULT_DATE, default_args={'owner': 'owner1'}, on_success_callback=on_failure_callback ) dag.clear() with dag: op1 = DummyOperator(task_id='A') op2 = DummyOperator(task_id='B') op2.set_upstream(op1) dag.clear() now = timezone.utcnow() dr = dag.create_dagrun(run_id='test_dagrun_deadlock', state=State.RUNNING, execution_date=now, start_date=now) ti_op1 = dr.get_task_instance(task_id=op1.task_id) ti_op1.set_state(state=State.REMOVED, session=session) ti_op2 = dr.get_task_instance(task_id=op2.task_id) ti_op2.set_state(state=State.SUCCESS, session=session) del dag.task_dict[ti_op1.task_id] dr.update_state() self.assertEqual(dr.state, State.SUCCESS) kall = on_failure_callback callback_context = kall.call_args[0][0] self.assertEqual('success', callback_context['reason']) ```
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