mik-laj opened a new pull request #11734: URL: https://github.com/apache/airflow/pull/11734
If we send signal SIGTERM - 15 several times to airflow webserver, then gunicorn can become [defunct process](https://askubuntu.com/questions/201303/what-is-a-defunct-process-and-why-doesnt-it-get-killed) and Airflow will not be able to handle this situation and will wait in an endless loop. Re-sending the signal to Airflow will cause it to re-send the signal SIGTERM - 15 to gunicorn (but it will not receive it anyway) and then re-enter the endless loop. As a result, Airflow can only be stopped by signal SIGKILL - -9. It is possible that it will fix some of the tests we have in quarantine. <!-- 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 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/master/CONTRIBUTING.rst#pull-request-guidelines)** for more information. In case of fundamental code change, Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+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 [UPDATING.md](https://github.com/apache/airflow/blob/master/UPDATING.md). ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected]
