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From "Ajay Yadava (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AIRFLOW-210) sqlalchemy warns about task_instance.execution_date invoked with an empty sequence
Date Tue, 28 Feb 2017 16:41:45 GMT

    [ https://issues.apache.org/jira/browse/AIRFLOW-210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15888402#comment-15888402
] 

Ajay Yadava commented on AIRFLOW-210:
-------------------------------------

Sorry for the delay on this. I hope to be able to spend some time on it now. Thanks for all
the pointers :)

> sqlalchemy warns about task_instance.execution_date invoked with an empty sequence
> ----------------------------------------------------------------------------------
>
>                 Key: AIRFLOW-210
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-210
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: Airflow 1.7.0
>         Environment: Linux, python 2.7, and mysql 5.5.47
>            Reporter: Eric Johnson
>            Assignee: Ajay Yadava
>            Priority: Minor
>
> On a fresh installation of airflow, I'm noticing this warning while running the scheduler.
I'm using mysql as the storage for airflow.
> {{/opt/packages/python/2.7.5/lib/python2.7/site-packages/sqlalchemy/sql/default_comparator.py:153:
SAWarning: The IN-predicate on "task_instance.execution_date" was invoked with an empty sequence.
This results in a contradiction, which nonetheless can be expensive to evaluate.  Consider
alternative strategies for improved performance.}}



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