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https://issues.apache.org/jira/browse/AIRFLOW-1204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bryan Vanderhoof closed AIRFLOW-1204.
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Resolution: Not A Bug
> Scheduler ignores start_date if an earlier successful dag run exists
> --------------------------------------------------------------------
>
> Key: AIRFLOW-1204
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1204
> Project: Apache Airflow
> Issue Type: Bug
> Affects Versions: Airflow 1.8
> Reporter: Bryan Vanderhoof
>
> I have repeatedly run into a problem with the scheduler automatically
> scheduling DAGs before their start_date if a previous run of the DAG exists
> in the database.
> For example, if a new DAG has a start_date of 2017-05-01, it will run
> starting on that date as expected. However, if there's a existing run for
> execution_date 2017-04-01, the scheduler will automatically generate dag runs
> for 2017-04-02 through 2017-05-01, completely ignoring the start_date.
> This also happens with backfills. Today, I began backfilling data for January
> 2017 on a DAG with a start date of 2017-05-01. The backfill began as
> expected, but as soon as some of the January tasks began completing, the
> scheduler also created dag runs for every day in February, March, and April.
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