zachliu opened a new pull request #22002: URL: https://github.com/apache/airflow/pull/22002
In an old PR https://github.com/apache/airflow/pull/14263 we tried to add a "retry" mechanism for triggering new ECS task but it didn't work as expected according to my explanation in https://github.com/apache/airflow/pull/16150. The TL;DR version is: * The immediate API response after sending out the `run_task` request to aws is not reliable. To make sure our task is really running in good health, we have to wait and send out another `describe_tasks` request. This explanation still holds today. Since people start using Fargate nowadays, this issue becomes more and more acute. On a good day, 0.15% Fargate tasks could fail to start due to ENI (AWS Elastic Network Interface) provision failures. However on a bad day, it could rise to 1~2%. Per recommendations from the AWS support team, we should consider the "triggering an ECS task, waiting for it to be provisioned, checking for its status" steps a single routine that can be retried as a whole. <!-- 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/main/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/main/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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
