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https://issues.apache.org/jira/browse/AIRFLOW-2386?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

sulphide updated AIRFLOW-2386:
------------------------------
    Description: 
When I run an airflow backfill using the airflow cli (i.e. airflow backfill -s 
somedate -e someotherdate dag_id), if the start date of the backfill is before 
the start_date of the dag, then airflow ignores depends_on_past and runs tasks 
in parallel for different days that have depends_on_past set to true. If the 
end date of the backfill is after the start_date of the dag then the backfill 
will begin respecting depends_on_past once it reaches the start_date of the 
dag. Seems like a bug.

airflow 1.9
LocalExecutor
python 2.7.9

  was:
When I run an airflow backfill using the airflow cli (i.e. airflow backfill -s 
somedate -e someotherdate dag_id), if the start date of the backfill is before 
the start_date of the dag, then airflow ignores depends_on_past and runs tasks 
in parallel for different days that have depends_on_past set to true. If the 
end date of the backfill is after the start_date of the dag then the backfill 
will begin respecting depends_on_past once it reaches the start_date of the 
dag. Seems like a bug.

airflow 1.9
python 2.7.9
amazonlinux


> airflow backfill ignores depends_on_past when backfilling before start_date
> ---------------------------------------------------------------------------
>
>                 Key: AIRFLOW-2386
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-2386
>             Project: Apache Airflow
>          Issue Type: Bug
>    Affects Versions: 1.9.0
>            Reporter: sulphide
>            Priority: Major
>
> When I run an airflow backfill using the airflow cli (i.e. airflow backfill 
> -s somedate -e someotherdate dag_id), if the start date of the backfill is 
> before the start_date of the dag, then airflow ignores depends_on_past and 
> runs tasks in parallel for different days that have depends_on_past set to 
> true. If the end date of the backfill is after the start_date of the dag then 
> the backfill will begin respecting depends_on_past once it reaches the 
> start_date of the dag. Seems like a bug.
> airflow 1.9
> LocalExecutor
> python 2.7.9



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