viiccwen opened a new issue, #69975: URL: https://github.com/apache/airflow/issues/69975
### Under which category would you file this issue? Airflow Core ### Apache Airflow version `main` ### What happened and how to reproduce it? The Scheduler drains each executor's event buffer before the database transaction that records the events has committed. If that commit raises a transient database error, an executor callback completion event has already been removed from the buffer even though its `Callback` row remains in `QUEUED` or `RUNNING`. Unlike task instances, executor callbacks have no recovery path that reselects these states. The callback can therefore remain active indefinitely. To reproduce on `main`: 1. Create an `ExecutorCallback` in `QUEUED` state. 2. Add a matching successful `CallbackKey` event to an executor's event buffer. 3. Run the Scheduler's executor-event processing while making the event session's `commit()` raise an `OperationalError`. 4. Observe that the callback row is still `QUEUED`, while the original event buffer is empty. This was reproduced against the production event-processing path with an actual transaction rollback. ### What you think should happen instead? Executor callback completion events should remain available until their state update commits. Transient DB errors should be retried without replaying task-event side effects. If the configured DB retries are exhausted, the callback events should return to their owning executor buffer and be retried by the next Scheduler loop without terminating the Scheduler. ### Operating System _No response_ ### Deployment None ### Apache Airflow Provider(s) _No response_ ### Versions of Apache Airflow Providers _No response_ ### Official Helm Chart version Not Applicable ### Kubernetes Version _No response_ ### Helm Chart configuration _No response_ ### Docker Image customizations _No response_ ### Anything else? _No response_ ### Are you willing to submit PR? - [x] Yes I am willing to submit a PR! ### Code of Conduct - [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.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]
