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https://issues.apache.org/jira/browse/AIRFLOW-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16408835#comment-16408835
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Joy Gao commented on AIRFLOW-2231:
----------------------------------
Got a chance to look at code and turns out the doc is not accurate,
dateutil.relativedelta.relativedelta is not supported, but datetime.timedelta
is. In the case where you need monthly cadence, you can use either @monthly or
cron syntax instead.
Alternatively, if you'd like to add relativedelta, you can submit a PR and
modify [this
section|https://github.com/apache/incubator-airflow/blob/master/airflow/models.py#L3168-L3196]
to support relativedelta.
> DAG with a relativedelta schedule_interval fails
> ------------------------------------------------
>
> Key: AIRFLOW-2231
> URL: https://issues.apache.org/jira/browse/AIRFLOW-2231
> Project: Apache Airflow
> Issue Type: Bug
> Components: DAG
> Reporter: Kyle Brooks
> Priority: Major
> Attachments: test_reldel.py
>
>
> The documentation for the DAG class says using
> dateutil.relativedelta.relativedelta as a schedule_interval is supported but
> it fails:
>
> Traceback (most recent call last):
> File "/usr/local/lib/python3.6/site-packages/airflow/models.py", line 285,
> in process_file
> m = imp.load_source(mod_name, filepath)
> File
> "/usr/local/Cellar/python3/3.6.1/Frameworks/Python.framework/Versions/3.6/lib/python3.6/imp.py",
> line 172, in load_source
> module = _load(spec)
> File "<frozen importlib._bootstrap>", line 675, in _load
> File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
> File "<frozen importlib._bootstrap_external>", line 678, in exec_module
> File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
> File "/Users/k398995/airflow/dags/test_reldel.py", line 33, in <module>
> dagrun_timeout=timedelta(minutes=60))
> File "/usr/local/lib/python3.6/site-packages/airflow/models.py", line 2914,
> in __init__
> if schedule_interval in cron_presets:
> TypeError: unhashable type: 'relativedelta'
>
> It looks like the __init__ function for class DAG assumes the
> schedule_interval is hashable.
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