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https://issues.apache.org/jira/browse/AIRFLOW-2733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16537874#comment-16537874
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Taylor Edmiston commented on AIRFLOW-2733:
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Do you know if this bug affects all versions of Python or only some (e.g.,
perhaps the missing method called was added in a later version)?
> Airflow webserver crashes with refresh interval <= 0 in daemon mode
> -------------------------------------------------------------------
>
> Key: AIRFLOW-2733
> URL: https://issues.apache.org/jira/browse/AIRFLOW-2733
> Project: Apache Airflow
> Issue Type: Bug
> Reporter: George Leslie-Waksman
> Priority: Major
>
> In airflow/bin/cli.py calls to mointor_gunicorn sub-function
> ([https://github.com/apache/incubator-airflow/blob/master/airflow/bin/cli.py#L841)]
> are made using a mix of psutil.Process objects and subprocess.Popen objects.
>
> Case 1:
> [https://github.com/apache/incubator-airflow/blob/master/airflow/bin/cli.py#L878]
> Case 2:
> [https://github.com/apache/incubator-airflow/blob/master/airflow/bin/cli.py#L884]
>
> In the event worker_refresh_interval is <=0 and we are in daemon mode, we end
> up calling a non-existent `poll` function on a psutil.Process object:
> https://github.com/apache/incubator-airflow/blob/master/airflow/bin/cli.py#L847
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