potiuk opened a new pull request, #28283: URL: https://github.com/apache/airflow/pull/28283
Gevent needs to monkeypatch a number of system libraries as soon as possible when Python interpreter starts, in order to avoid other libraries monkey-patching them before. We should do it before any other initialization and it needs to be only run on webserver. So far it was done by local_settings monkeypatching but that has been rather brittle and some changes in Airflow made previous attempts to stop working because the "other" packages could be loaded by Airflow before - depending on installed providers and configuration (for example when you had AWS configured as logger, boto could have been loaded before and it could have monkey patch networking before gevent had a chance to do so. This change introduces different mechanism of triggering the patching - it could be triggered by setting an environment variable. This has the benefit that we do not need to initialize anything (including reading settings or setting up logging) before we determine if gevent patching should be performed. It has also the drawback that the user will have to set the environment variable in their deployment manually. However this is a small price to pay if they will get a stable and future-proof gevent monkeypatching built-in in Airflow. Fixes: #8212 <!-- Thank you for contributing! Please make sure that your code changes are covered with tests. And in case of new features or big changes remember to adjust the documentation. Feel free to ping committers for the review! In case of an existing issue, reference it using one of the following: closes: #ISSUE related: #ISSUE How to write a good git commit message: http://chris.beams.io/posts/git-commit/ --> --- **^ Add meaningful description above** Read the **[Pull Request Guidelines](https://github.com/apache/airflow/blob/main/CONTRIBUTING.rst#pull-request-guidelines)** for more information. In case of fundamental code changes, an Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvement+Proposals)) is needed. In case of a new dependency, check compliance with the [ASF 3rd Party License Policy](https://www.apache.org/legal/resolved.html#category-x). In case of backwards incompatible changes please leave a note in a newsfragment file, named `{pr_number}.significant.rst` or `{issue_number}.significant.rst`, in [newsfragments](https://github.com/apache/airflow/tree/main/newsfragments). -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
