mik-laj commented on a change in pull request #20640:
URL: https://github.com/apache/airflow/pull/20640#discussion_r779558160
##########
File path: docs/apache-airflow/concepts/operators.rst
##########
@@ -208,3 +208,22 @@ In this case, ``order_data`` argument is passed:
``{"1001": 301.27, "1002": 433.
Airflow uses Jinja's `NativeEnvironment
<https://jinja.palletsprojects.com/en/2.11.x/nativetypes/>`_
when ``render_template_as_native_obj`` is set to ``True``.
With ``NativeEnvironment``, rendering a template produces a native Python type.
+
+.. _concepts:reserved-keywords:
+
+Reserved params keyword
+-----------------------
+
+In Apache Airflow 2.2.0 ``params`` variable is used during DAG serialization.
Please do not use that name in third party operators.
+If you upgrade your environment and get the following error:
+
+.. code-block::
+
+ Broken DAG: [/opt/airflow/dags/ImamRefresh_DAG.py] Traceback (most recent
call last):
+ File
"/home/airflow/airflow_venv/lib64/python3.6/site-packages/airflow/serialization/serialized_objects.py",
line 574, in serialize_operator
+ serialize_op['params'] = cls._serialize_params_dict(op.params)
+ File
"/home/airflow/airflow_venv/lib64/python3.6/site-packages/airflow/serialization/serialized_objects.py",
line 447, in _serialize_params_dict
+ if f'{v.__module__}.{v.__class__.__name__}' ==
'airflow.models.param.Param':
Review comment:
```suggestion
```
I have the impression that only the error message is enough.
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