mobuchowski commented on code in PR #39513:
URL: https://github.com/apache/airflow/pull/39513#discussion_r1596535771
##########
tests/listeners/class_listener.py:
##########
@@ -47,9 +47,7 @@ def on_task_instance_success(self, previous_state,
task_instance, session):
self.state.append(TaskInstanceState.SUCCESS)
@hookimpl
- def on_task_instance_failed(
- self, previous_state, task_instance, error: None | str |
BaseException, session
- ):
+ def on_task_instance_failed(self, previous_state, task_instance, session):
Review Comment:
@potiuk True, that reproduction works, but I think we have an expectation
mismatch here. The backwards compatibility here works in other direction - I
would formulate it as it allows plugins to opt-in to receive earlier and later
events.
As the example in [this comment
shows](https://github.com/apache/airflow/pull/38155#issuecomment-2044703627) we
haven't broken earlier listeners by adding this field. If listener wants to add
support to receiving that field, and simultaneously support earlier Airflow
versions, it's sufficient to do that:
```python
if AIRFLOW_VERSION >= Version("2.10.0"):
@hookimpl
def on_task_instance_failed(previous_state, task_instance, error: None |
str | BaseException, session):
...
else:
@hookimpl
def on_task_instance_failed(previous_state, task_instance, session):
...
```
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