[I] DAGs are not marked as stale if the AIRFLOW__CORE__DAGS_FOLDER changes [airflow]

["utkarsharma2 (via GitHub)" <gi...@apache.org>]

utkarsharma2 opened a new issue, #41432:
URL: https://github.com/apache/airflow/issues/41432

   ### Apache Airflow version
   
   2.9.3
   
   ### If "Other Airflow 2 version" selected, which one?
   
   _No response_
   
   ### What happened?
   
   Suppose we start Airflow with the following DAGs located in /<user_root>/airflow/dags:
   
       abc.py
       xyz.py
   
   Later, we decide to change the default DAG folder to /<user_root>/airflow/dags_backup/, which contains different DAG files, by setting the environment variable AIRFLOW__CORE__DAGS_FOLDER=/<user_root>/airflow/dags_backup/. After restarting the scheduler, the new folder includes the following DAGs:
   
       efg.py
       hij.py
   
   At this point, the Airflow UI will display all the DAGs from both sets of files (abc.py, xyz.py, efg.py, and hij.py), even though the current dags_folder no longer contains the original abc.py and xyz.py.
   
   Note: This behavior has been observed even for active DAGs.
   
   ### What you think should happen instead?
   
   The expectation is that the airflow UI should only dags belonging to the new dags folder `/<user_root>/airflow/dags_backup/`.
   
   ### How to reproduce
   
   1. Start Airflow with some dags in the `dags` folder.
   2. Change the default dag folder using `AIRFLOW__CORE__DAGS_FOLDER` to another folder containing a different set of dags. 
   3. Notice both sets of dags are visible on the UI. 
   
   ### Operating System
   
   Ventura - Mac
   
   ### Versions of Apache Airflow Providers
   
   _No response_
   
   ### Deployment
   
   Virtualenv installation
   
   ### Deployment details
   
   _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)
   


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Re: [I] DAGs are not marked as stale if the AIRFLOW__CORE__DAGS_FOLDER changes [airflow]

["utkarsharma2 (via GitHub)" <gi...@apache.org>]

utkarsharma2 closed issue #41432: DAGs are not marked as stale if the AIRFLOW__CORE__DAGS_FOLDER changes
URL: https://github.com/apache/airflow/issues/41432


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