potiuk opened a new issue, #38167: URL: https://github.com/apache/airflow/issues/38167
### Discussed in https://github.com/apache/airflow/discussions/38165 <div type='discussions-op-text'> <sup>Originally posted by **HenryLee19** March 14, 2024</sup> ### Apache Airflow version Other Airflow 2 version (please specify below) ### If "Other Airflow 2 version" selected, which one? 2.8.3 ### What happened? I changed the "max_active_runs_per_dag" from the default of 16 to 2, in the Airflow config. Then manually triggered a DAG 10x via the UI and observed 10 instances of the DAG in the "running" state. ### What you think should happen instead? I expected there to be 2 instances in the "running" state and 8 in the "queued" state. (Note, setting "max_active_runs" at the DAG level works. It is only the global "max_active_runs_per_dag" that appears to be not working.) ### How to reproduce 1. in airflow.cfg, change "max_active_runs_per_dag" from the default of 16 to 2 2. restart Airflow (Docker container, in my case) 3. trigger a DAG via the UI play button 10x 4. observe 10 instances of the DAG in the "running" state ### Operating System Debian GNU/Linux 12 (bookworm) ### Versions of Apache Airflow Providers _No response_ ### Deployment Docker-Compose ### Deployment details Used the docker-compose found here: https://airflow.apache.org/docs/apache-airflow/2.8.3/docker-compose.yaml ### Anything else? DAG definition: ``` from datetime import datetime import time from airflow import DAG from airflow.operators.python import PythonOperator default_args = { 'owner': 'airflow', 'depends_on_past': False, 'start_date': datetime(2024, 1, 1), 'email': ['[email protected]'], 'email_on_failure': False, 'email_on_retry': False, 'retries': 0, } def _task1(**context): time.sleep(120) return with DAG( dag_id='dag1', default_args=default_args, schedule=None, catchup=False ) as dag: task1 = PythonOperator( task_id='task1', python_callable=_task1 ) ``` ### 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) </div> -- 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]
