theister commented on issue #18501:
URL: https://github.com/apache/airflow/issues/18501#issuecomment-984785114


   Short update:
   
   I was able to reproduce the problem using the following minimal example on 
`2.0.2`
   
   ```
   from datetime import datetime
   from airflow import DAG
   from airflow.operators.dummy import DummyOperator
   from airflow.operators.bash import BashOperator
   
   with DAG(
       "debug-long-replay-dag",
       schedule_interval="0 0 * * *",
       start_date=datetime(2020, 1, 1),
       max_active_runs=10,
       catchup=True,
   ) as long_dag:
   
       initial_task = DummyOperator(task_id="initial-task")
       sleep_task = BashOperator(bash_command="sleep 300", 
task_id="sleep-5-mins")
       initial_task >> sleep_task
   
   with DAG(
       "debug-frequent-dag",
       schedule_interval="*/1 * * * *",
       start_date=datetime(2021, 1, 1),
       catchup=False,
   ) as hf_dag:
   
       sleep_task = BashOperator(bash_command="sleep 30", 
task_id="sleep-30-sec")
   ```
   
   We're currently upgrading our instances to 2.2.2, and I can no longer 
reproduce it on the new version 🚀 
   Clearing task instances for a large number of dag runs now sets all DagRuns 
to the newly introduced `"queued"` DagRun status, and the scheduler no longer 
is starved out.
   
   @vlieven @leonsmith please check if 2.2.2 solves it for you, too.


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