heepengpeng opened a new issue, #46644: URL: https://github.com/apache/airflow/issues/46644
### Apache Airflow version 2.10.5 ### If "Other Airflow 2 version" selected, which one? _No response_ ### What happened? when set metaclass=Singleton, when call sqlalchemy.util.langhelpers. class_hierarchy(cls)  there happen TypeError because Singleton.__subclasses__() will be failed ### What you think should happen instead? _No response_ ### How to reproduce when set metaclass=Singleton, when call sqlalchemy.util.langhelpers. class_hierarchy(cls)  there happen TypeError because Singleton.__subclasses__() will be failed ### Operating System linux ### Versions of Apache Airflow Providers _No response_ ### Deployment Official Apache Airflow Helm Chart ### Deployment details _No response_ ### Anything else? _No response_ ### Are you willing to submit PR? - [ ] 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]
