dstandish commented on code in PR #39259:
URL: https://github.com/apache/airflow/pull/39259#discussion_r1607061565
##########
airflow/models/taskinstance.py:
##########
@@ -1003,25 +1009,40 @@ def _refresh_from_task(
task_instance_mutation_hook(task_instance)
+@internal_api_call
+@provide_session
def _record_task_map_for_downstreams(
- *, task_instance: TaskInstance | TaskInstancePydantic, task: Operator,
value: Any, session: Session
+ *,
+ task_instance: TaskInstance | TaskInstancePydantic,
+ task: Operator,
+ dag: DAG,
+ value: Any,
+ session: Session,
) -> None:
"""
Record the task map for downstream tasks.
:param task_instance: the task instance
:param task: The task object
+ :param dag: the dag associated with the task
:param value: The value
:param session: SQLAlchemy ORM Session
:meta private:
"""
+ # when taking task over RPC, we need to add the dag back
+ if isinstance(task, MappedOperator):
+ if not task.dag:
+ task.dag = dag
+ elif not task._dag:
+ task._dag = dag
Review Comment:
fyi @uranusjr this is resolved here ([Use sentinel to elide the dag object
on
reserialization](https://github.com/apache/airflow/pull/37851/commits/7ba5fc8ac05b2003ef5050f9b13f34e0fdb1ef80))
but i can't make this PR yet because it's depending on too many other PRs to
get merged first
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