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https://issues.apache.org/jira/browse/AIRFLOW-3544?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17368348#comment-17368348
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Zhike Chen commented on AIRFLOW-3544:
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I got the same issue using Celery Executor
> MySQL warnings about aborted connections
> ----------------------------------------
>
> Key: AIRFLOW-3544
> URL: https://issues.apache.org/jira/browse/AIRFLOW-3544
> Project: Apache Airflow
> Issue Type: Bug
> Components: worker
> Affects Versions: 1.10.1
> Reporter: Rami Darwish
> Priority: Minor
>
> We're still seeing some warnings about aborted connections in our mysql log.
> 2018-12-19T01:37:18.584535Z 3489268 [Note] Aborted connection 3489268 to db:
> 'airflow' user: 'airflow' host: 'x.x.x.x' (Got an error reading communication
> packets)
> Looks like engine disposal is not being performed on the worker/task process.
> I was able to reproduce by executing a BashOperator command with "sleep 120".
> Once the task finished execution, the warning is generated and it is coming
> from the worker host. I'm still not sure if it is coming from the worker or
> from the task instance itself.
>
> We're using airflow 1.10.1, mysql 5.7, python 2.7.13 and SQLAlchemy 1.1.18
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