[jira] [Created] (AIRFLOW-4308) Changed Time Zone behaviour in Python 3.6+ vs Python 3.5

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

Jarek Potiuk created AIRFLOW-4308:
-------------------------------------

             Summary: Changed Time Zone behaviour in Python 3.6+ vs Python 3.5
                 Key: AIRFLOW-4308
                 URL: https://issues.apache.org/jira/browse/AIRFLOW-4308
             Project: Apache Airflow
          Issue Type: Bug
            Reporter: Jarek Potiuk


It seems that one of the tests is failing in Python 3.5 vs. Python 3.6 related to different behaviour of python with regards to TZ environment variable: [https://bugs.python.org/issue30062] 

We've yet have to determine whether this is a problem with the test or Airflow code:

 

The test below works fine in Python 3.5.

 
{code:java}
+ nosetests tests.models.test_dag:DagTest.test_following_previous_schedule_daily_dag_CEST_to_CET
.
----------------------------------------------------------------------
Ran 1 test in 0.005s
OK
{code}
 

But it fails in Python 3.6:
{code:java}
nosetests tests.models.test_dag:DagTest.test_following_previous_schedule_daily_dag_CEST_to_CET
F
======================================================================
FAIL: Make sure DST transitions are properly observed
----------------------------------------------------------------------
Traceback (most recent call last):
 File "/opt/airflow/tests/models/test_dag.py", line 800, in test_following_previous_schedule_daily_dag_CEST_to_CET
 self.assertEqual(next_local.isoformat(), "2018-10-28T03:00:00+01:00")
AssertionError: '2018-10-28T02:00:00+01:00' != '2018-10-28T03:00:00+01:00'
- 2018-10-28T02:00:00+01:00
? ^
+ 2018-10-28T03:00:00+01:00
? ^{code}
 

 



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