JavierLopezT edited a comment on issue #13542:
URL: https://github.com/apache/airflow/issues/13542#issuecomment-1007235056


   This has started happening to us as well. Randomly (3 nights over 10), all 
tasks get stuck in queued state and we have to manually clear the state for it 
to recover. We have seen that it is related to the decrease of this metric in 
datadog:
   
   
![image](https://user-images.githubusercontent.com/11339132/148517399-95681f0c-260e-48cb-9b38-b7d0556d8df9.png)
   
   Airflow 2.1.1 in EC2
   


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