joaopamaral opened a new pull request, #36800:
URL: https://github.com/apache/airflow/pull/36800

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   The https://github.com/apache/airflow/pull/32707 has changed the scheduler 
to capture the exceptions (and not re-raising it) and it is making the 
scheduler always exit with code 0 (that means exit without error). In case of 
an `airflow-scheduler` running in a docker container with the `--restart 
always` option set, the exit code 0 will make the container stop and not 
restart because docker will interpret it as the code ran and finished with 
success. So if you have a DB quick unavailability, the `airflow-scheduler` will 
not try to recover by restarting it and it will stop, causing the airflow 
instance to crash (without the scheduler).
   
   So, this PR is raising the exception and forcing the process in context to 
terminate (closing the contexts in `stack` on `finally` to keep avoiding the 
zombie scheduler https://github.com/apache/airflow/issues/32706) and avoid the 
scheduler exiting with code 0.
   
   
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