park-peter opened a new issue, #27824: URL: https://github.com/apache/airflow/issues/27824
### Apache Airflow version 2.4.3 ### What happened A significant fraction of the DAG Runs of a DAG that has 2+ consecutive mapped tasks which are are being passed an empty list are marked as failed when all tasks are either succeeding or being skipped. This was supposedly fixed with issue #25200 but the problem still persists.  ### What you think should happen instead The DAG Run should be marked success. ### How to reproduce The real world version of this DAG has several mapped tasks that all point to the same list, and that list is frequently empty. I have made a minimal reproducible example. ``` from datetime import datetime from airflow import DAG from airflow.decorators import task with DAG(dag_id="break_mapping", start_date=datetime(2022, 3, 4)) as dag: @task def add_one(x: int): return x + 1 @task def say_hi(): print("Hi") @task def say_bye(): print("Bye") added_values = add_one.expand(x=[]) added_more_values = add_one.expand(x=[]) added_more_more_values = add_one.expand(x=[]) say_hi() >> say_bye() >> added_values added_values >> added_more_values >> added_more_more_values ``` ### Operating System Debian Bullseye ### Versions of Apache Airflow Providers _No response_ ### Deployment Astronomer ### 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: commits-unsubscr...@airflow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
