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Ran 12 Dec 2017 12:49PM UTC

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Committed 12 Dec 2017 12:49PM UTC coverage: 73.511% (-0.08%) from 73.594%

Job # TOX_ENV=py34-backend_sqlite

Build Type

cron

travis-ci

Committed by Bolke de Bruin

Commit Message

[AIRFLOW-1884][AIRFLOW-1059] Reset orphaned task state for external dagruns

On scheduler startup, orphaned task instances have
their state cleared and are rescheduled to avoid
having tasks that are stuck in a QUEUED state
forever. Previously, this check ignored backfilled
and externally triggered dagruns, meaning that
backfilled and externally triggered dagruns could
have orphaned tasks that are stuck forever. This
changeset removes the special case logic for
externally triggered dagruns, ensuring that
externally triggered dagruns are crash safe. This
same fix cannot be applied to backfilled dagruns,
so for now backfilled dagruns are not crash safe.

Closes #2843 from grantnicholas/AIRFLOW-1884

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