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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2021/09/02 08:19:46 UTC

[GitHub] [airflow] ephraimbuddy edited a comment on pull request #17945: Fix max_active_runs not allowing scheduling of other dagruns

ephraimbuddy edited a comment on pull request #17945:
URL: https://github.com/apache/airflow/pull/17945#issuecomment-911357411


   What happens is that the method `DagRun.next_dagruns_to_examine` gets the earliest dagruns without considering the dag that has the dagrun.
   For example:
   If you have a dag with execution_date 2020,1,1 and set `catchup=True, max_active_runs=1, schedule_interval='@daily'` and another dag with execution_date 2021,1,1 and also set `catchup=True, schedule_interval='@daily'`.
   When you unpause the two dags(the one with max_active_runs first), the dagruns would be created but only one dagrun would be active because of how DagRun.next_dagruns_to_examine works.
   (worried about performance on this PR. Please advice)


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