Newton Le created AIRFLOW-4070:
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Summary: AirflowException on repeated dependencies prevents
automated dependencies
Key: AIRFLOW-4070
URL: https://issues.apache.org/jira/browse/AIRFLOW-4070
Project: Apache Airflow
Issue Type: Bug
Reporter: Newton Le
Assignee: Newton Le
We are trying to build automated dependencies based on data. For example, if
Task A requires data from Task B, then a task dependency will be automatically
generated. At the same time, we still want to allow users to specify explicit
dependencies, e.g. `task_a >> task_b`.
Airflow's current way of raising an exception on duplicate dependencies
currently blocks this implementation. Also, I can't think of a good
justification for it. For the purposes I can imagine, logging a warning seems
more than sufficient.
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