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https://issues.apache.org/jira/browse/AIRFLOW-1884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Grant Nicholas updated AIRFLOW-1884:
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Summary: Ensure scheduler is crash safe for externally triggered dagruns
(was: Ensure scheduler is crash safe for externally triggered and backfilled
dagruns)
> Ensure scheduler is crash safe for externally triggered dagruns
> ---------------------------------------------------------------
>
> Key: AIRFLOW-1884
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1884
> Project: Apache Airflow
> Issue Type: Bug
> Reporter: Grant Nicholas
> Assignee: Grant Nicholas
>
> Orphaned task instances are only reset for dagruns that are both not
> externally triggered and not backfilled. This violates the crash safety
> property of the scheduler, ie) if the scheduler crashes in the middle of one
> of these dagruns then tasks can be stuck in the "Queued" state forever and
> never executed.
> I found the changeset this regression happened in, it is this one:
> https://issues.apache.org/jira/browse/AIRFLOW-1059
> This change reverts the special casing logic so that all dagruns have
> orphaned tasks reset on startup of the scheduler.
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