feng-tao commented on a change in pull request #4673: [AIRFLOW-3851]
ExternalTasksensor not check existence in later poke
URL: https://github.com/apache/airflow/pull/4673#discussion_r255288927
##########
File path: airflow/sensors/external_task_sensor.py
##########
@@ -136,6 +140,7 @@ def poke(self, context, session=None):
raise AirflowException('The external task'
'{} in DAG {} does not
exist.'.format(self.external_task_id,
self.external_dag_id))
+ self.has_check_existence = True
Review comment:
update
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