darwinyip opened a new issue #10275:
URL: https://github.com/apache/airflow/issues/10275


   **Description**
   
   Trigger rule for `always`.
   
   **Use case / motivation**
   
   This comes in handy when there is a need to clean up resources at the end of 
the DAG run no matter whether it fails or succeeds.
   
   For example:
   ```
   allocate >> a >> b >> c >> d >> cleanup
   ```
   
   The biggest issue is that if an error occurs before `d`, `cleanup` will 
never get executed.
   
   Example use case is using BigQuery's Reservation API. We want to reserve 
slots at the beginning of the run and deallocate at the end. Not deallocating 
would mean a rampant bill at the end of the month.
   
   


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