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https://issues.apache.org/jira/browse/AIRFLOW-4832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17225737#comment-17225737
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Dean commented on AIRFLOW-4832:
-------------------------------
I tried to reproduce this in 1.10.12 and can confirm that it's no longer
happening.
> Infinite loops during fall DST transition
> -----------------------------------------
>
> Key: AIRFLOW-4832
> URL: https://issues.apache.org/jira/browse/AIRFLOW-4832
> Project: Apache Airflow
> Issue Type: Bug
> Components: scheduler
> Affects Versions: 1.10.3
> Reporter: Dean
> Priority: Major
>
> This seems similar to AIRFLOW-3422, but is still happening in 1.10.3. I'm
> running python 3.6.8.
> I'm running this dag:
> {code:python}
> from airflow import DAG
> from airflow.operators.python_operator import PythonOperator
> from datetime import datetime
> import logging
> from pendulum import timezone
> def msg(**kwargs):
> logging.info(str(kwargs['execution_date']))
> default_args = {
> 'start_date': datetime(2018, 11, 1,
> tzinfo=timezone('America/Los_Angeles')),
> }
> dag = DAG('tz_test_1',
> default_args=default_args,
> catchup=True,
> schedule_interval='0 2 * * *')
> t1 = PythonOperator(
> task_id='t1',
> provide_context=True,
> python_callable=msg,
> dag=dag)
> {code}
> On Nov 4 the clock goes from 1:59:59 AM to 1:00:00 AM. The backfill will run
> tasks until this one runs:
> {noformat}
> {tz_test.py:8} INFO - 2018-11-04T09:00:00+00:00
> {noformat}
> After that, running further tasks doesn't seem to be possible for this dag.
> Note that the same dag with {{schedule_interval}} changed to {{'0 0 * * *'}}
> or {{'0 1 * * *'}} does not have this problem
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