nadflinn commented on issue #8480:
URL: https://github.com/apache/airflow/issues/8480#issuecomment-623185999


   The autoscale config is commented out since 1.10.10 which is a change from 
1.10.9 where it isn't and I think this accounts for the difference in the 
behavior that people are seeing.
   
https://github.com/apache/airflow/blob/1.10.9/airflow/config_templates/default_airflow.cfg#L480
   
https://github.com/apache/airflow/blob/1.10.10/airflow/config_templates/default_airflow.cfg#L516
   
   Based on the 
[comment](https://github.com/apache/airflow/blob/1.10.9/airflow/config_templates/default_airflow.cfg#L477)
 above the setting, it makes sense that you wouldn't be able to set worker 
concurrency in 1.10.9: 
   ` If autoscale option is available, worker_concurrency will be ignored`


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