newtonle commented on issue #4904: [AIRFLOW-4070] AirflowException -> log.warning for duplicate task dependencies URL: https://github.com/apache/airflow/pull/4904#issuecomment-471795644 > personally I think it makes more sense to check whether a dependency is already there in your process of automatically generating dependency (if yes, don’t try to add that dependency again) The problem with that is that the automated system can check for that, but the user may specify it afterward, which raises the exception.
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