abhijeets25012-tech opened a new pull request, #72563:
URL: https://github.com/apache/airflow/pull/72563
### Description
Fixes #72544
`_get_parent_defaults` previously used `copy.copy` (shallow copy) when
merging `dag.default_args`. This caused nested mutable structures, specifically
`executor_config`, to be shared by object reference across all tasks and DAGs
inheriting from those shared defaults. Consequently, runtime mutations to
`task.executor_config` (such as setting Kubernetes pod overrides) silently
modified sibling tasks and unrelated DAGs.
This PR updates `_get_parent_defaults` to use `copy.deepcopy` and explicitly
deep-copies `executor_config` during `BaseOperator` initialization, ensuring
strict reference isolation across task definitions.
### Changes Made
- **`task-sdk/src/airflow/sdk/bases/operator.py`**:
- Replaced `copy.copy(dag.default_args)` with
`copy.deepcopy(dag.default_args)` in `_get_parent_defaults`.
- Updated `self.executor_config` assignment in `BaseOperator.__init__` to
use `copy.deepcopy(executor_config)` to isolate both explicit and inherited
configurations.
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