Bolke de Bruin created AIRFLOW-3277:
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Summary: Invalid timezone transition handling for cron schedules
Key: AIRFLOW-3277
URL: https://issues.apache.org/jira/browse/AIRFLOW-3277
Project: Apache Airflow
Issue Type: Bug
Affects Versions: 1.10.0
Reporter: Bolke de Bruin
Fix For: 1.10.1
`following_schedule` converts to naive time by using the local time zone. In
case of a DST transition, say 3AM -> 2AM ("summer time to winter time") we
generate date times that could overlap with earlier schedules. Therefore a DAG
that should run every 5 minutes will not do so if it has already seen the
schedule.
We should not convert to naive and keep UTC.
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