sc-ndrf opened a new issue, #43743: URL: https://github.com/apache/airflow/issues/43743
### Apache Airflow version 2.10.2 ### If "Other Airflow 2 version" selected, which one? _No response_ ### What happened? I am using [dynamic task mapping](https://airflow.apache.org/docs/apache-airflow/stable/authoring-and-scheduling/dynamic-task-mapping.html#simple-mapping) to create two instances of a task `make_paths` that returns a single string. The return values are then passed to a task that expects a list of string for further processing. However, before executing the second task, `print_paths`, an exception is thrown: `ModuleNotFoundError: No module named '***'`. The log file is attached. When the tasks are decorated with `@task` instead of `task.external_python` , the DAG runs successfully and produces the expected output. [error.log](https://github.com/user-attachments/files/17647662/error.log) ### What you think should happen instead? The DAG should run without error also using the `task.external_python` decorator. ### How to reproduce - Download and unpack the attached zip archive. - Build and start the Docker containers using `docker compose build --no-cache && docker compose up -d` - Open the web GUI at `http://localhost:8090/dags/test_dag` and run the test DAG. Use `airflow:airflow` as login. ### Operating System Ubuntu 24.04 as host OS. ### Versions of Apache Airflow Providers none used. ### Deployment Docker-Compose ### Deployment details Docker container based on the official `apache/airflow:2.10.2-python3.12` image. Docker Compose version 2.24.6+ds1-0ubuntu2 ### 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]
