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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2019/04/30 18:30:44 UTC

[GitHub] [airflow] khgitting opened a new pull request #5214: [AIRFLOW-4443] Document behavior of LatestOnlyOperator for externally triggered dagrun

khgitting opened a new pull request #5214: [AIRFLOW-4443] Document behavior of LatestOnlyOperator for externally triggered dagrun
URL: https://github.com/apache/airflow/pull/5214
 
 
   A LatestOnlyOperator task will never skip downstream tasks if run in an
   externally triggered dagrun. This is probably reasonable–the software
   is not making assumptions about the trigger-er's intention when creating
   an unscheduled dagrun, and in that agnostic state, the default behavior
   would be to not skip any tasks.
   
   However, that rationale may not be obvious to an enduser, who may be
   confused why a latest-only task in an externally triggered dagrun with
   an execution_date in the past is not skipping downstream tasks.
   
   This PR updates the docstring for the LatestOnlyOperator to clarify
   the operator's behavior in this scenario.

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