kaxil opened a new pull request #13662: URL: https://github.com/apache/airflow/pull/13662
When a dag file is executed via Dag File Processors and multiple callbacks are created either via zombies or executor events, the dag file is added to the _file_path_queue and the manager will launch a new process to process it, which it should not since the dag file is currently under processing. This will bypass the _parallelism eventually especially when it takes long time to process some dag files. This address the same issue as https://github.com/apache/airflow/pull/11875 but instead does not exlucde filepaths that are recently processed and that run at limit (which is only used in tests) when Callbacks are sent by the Agent. This is by design as execution of Callbacks is critical. This is done with a caveat to avoid duplicate processor -- i.e. if a processor exists, instead of removing the file path from the queue it is removed from the beginning of the queue to the end. This means that the processor with the filepath to run callback is still run before other filepaths are added. Tests are added to check the same. closes https://github.com/apache/airflow/issues/13047 <!-- 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]
