Joshua Carp created AIRFLOW-5708:
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             Summary: Tasks that use non-existent pools should fail early
                 Key: AIRFLOW-5708
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-5708
             Project: Apache Airflow
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.10.5
            Reporter: Joshua Carp
            Assignee: Joshua Carp


Tasks associated with non-existent pools are never scheduled. The scheduler 
emits a warning log when it encounters these tasks, but there's no user-facing 
warning. I think that tasks with non-existent pools should throw an error, and 
ideally should throw it early. I'm submitting a draft PR to optionally cause 
dag parsing to fail if any task pools don't exist, but I'd be open to other 
approaches too.



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