potiuk commented on a change in pull request #20640:
URL: https://github.com/apache/airflow/pull/20640#discussion_r777904597
##########
File path: docs/apache-airflow/concepts/operators.rst
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@@ -208,3 +208,21 @@ 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 2.3.3 ``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:: python
Review comment:
I tihnk `params` is quite likely name that will be used by custom
operators, so having a warning against this one (and the fact that it has been
**just** added make it more likely for people to get the same problem.
Simply - operators that worked in 2.1 will stop working in 2.2 - which is
kinda unexpected. So I think this message is useful
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