ashb commented on code in PR #22909:
URL: https://github.com/apache/airflow/pull/22909#discussion_r847645333
##########
airflow/serialization/serialized_objects.py:
##########
@@ -1081,12 +1081,12 @@ def deserialize_dag(cls, encoded_dag: Dict[str, Any])
-> 'SerializedDAG':
setattr(task.subdag, 'parent_dag', dag)
if isinstance(task, MappedOperator):
- for d in (task.mapped_kwargs, task.partial_kwargs):
- for k, v in d.items():
- if not isinstance(v, _XComRef):
- continue
+ expansion_kwargs = task._get_expansion_kwargs()
Review Comment:
This was a bug that I don't know how we didn't hit before? The serialized
task as a result had these objects left as _XcomRef, which as it is a named
tuple has a `__len__` of 2 😱
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