[jira] [Commented] (AIRFLOW-3422) Infinite loops during springtime DST transitions on python 3.6

["jack (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AIRFLOW-3422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16820952#comment-16820952 ] 

jack commented on AIRFLOW-3422:
-------------------------------

[~ash] Have you managed to find a fix for this?

> Infinite loops during springtime DST transitions on python 3.6
> --------------------------------------------------------------
>
>                 Key: AIRFLOW-3422
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-3422
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 1.10.1
>            Reporter: Till Heistermann
>            Priority: Major
>             Fix For: 2.0.0
>
>
> Automatic DST transitions can cause dags to be stuck in an infinite loop, if they happen to be scheduled in the "skipped" hour during a springtime DST transition. 
> The fix introduced in https://issues.apache.org/jira/browse/AIRFLOW-3277 does not seem to work for python 3.6, only for 3.5 and 2.7.
> Example to reproduce (current master, python 3.6):
> {code:java}
> import pendulum
> from datetime import datetime
> from airflow.utils.timezone import make_aware
> from airflow.models import DAG
> nsw = pendulum.Timezone.load("Australia/Sydney")
> dt = make_aware(datetime(2018, 10, 3, 2, 30), nsw)
> dag = DAG("id", schedule_interval="30 2 * * *", start_date=dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> dt = dag.following_schedule(dt); print(dt)
> {code}
>  
>  



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