eladkal commented on issue #17734:
URL: https://github.com/apache/airflow/issues/17734#issuecomment-906176341
It make sense that backfill should respect the task definition for tasks
`start_date` and `end_date`.
If we have a dag as:
```
with DAG(
'my_dag',
default_args=default_args,
schedule_interval='@daily',
start_date=datetime(2019, 1, 1),
) as dag:
t1 = BashOperator(
task_id='print_date',
bash_command='date',
)
t2 = BashOperator(
task_id='print_date2',
bash_command='date',
start_date=datetime(2021, 1, 1)
)
```
and you are running `airflow dags backfill my_dag --start-date 2019-01-01
--end-date 2019-06-01`
I wouldn't expect `print_date2` to be a part of this backfill at all. To my
perspective the backfill `start-date` & `stop-date` specify the range of runs
that needs to be created - in these runs it doesn't make sense to consider
tasks that are not part of this window.
If someone has a different take on that I would love to hear the reasons
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