[GitHub] [airflow] bolkedebruin edited a comment on issue #17984: Add possibility to LineageBackend to be notified of task instance execution start and failure

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bolkedebruin edited a comment on issue #17984:
URL: https://github.com/apache/airflow/issues/17984#issuecomment-956272791


   I thin it is okay to streach the defintion of lineage like this. However, then I would not call it data lineage anymore. It is more like a generic auditing system then as it not only tracks data but starts tracking tasks as well. Is that the intention? We can expose this kind of information of course. `post_execute` seems ambigious in its defintion as it is unclear whether is is ran on success only. I prefer airflow to have a `on_state_change(old, new, context))` function which we can decorate with a plugin kind of way to handle this so you can tie in the LineageBackend to register to these state changes.
   
   Does that make sense?


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