tirkarthi commented on PR #23079:
URL: https://github.com/apache/airflow/pull/23079#issuecomment-1102555924
Test case and end result for the change.
```python
with DAG("test_mark_task_instance_state_failed_downstream_clear",
start_date=start_date) as dag:
task_1 = EmptyOperator(task_id="task_1")
task_2 = EmptyOperator(task_id="task_2")
task_3 = EmptyOperator(task_id="task_3")
task_1 >> task_2 >> task_3
```
Mark task_1 as Failed with Downstream True
| Task | Start state | End state |
|---|---|---|
| task_1 | Success | Failed |
| task_2 | Success | Failed |
| task_3 | Success | Failed |
| Task | Start state | End state |
|---|---|---|
| task_1 | Success | Failed |
| task_2 | Success | Failed |
| task_3 | Failed | Failed |
Mark task_1 as Failed with Downstream False
| Task | Start state | End state |
|---|---|---|
| task_1 | Success | Failed |
| task_2 | Success | Success |
| task_3 | Failed | None |
| Task | Start state | End state |
|---|---|---|
| task_1 | Failed | Failed |
| task_2 | Success | Success |
| task_3 | Failed | Failed |
| Task | Start state | End state |
|---|---|---|
| task_1 | Success | Failed |
| task_2 | Success | Success |
| task_3 | Success | Success |
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