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https://issues.apache.org/jira/browse/AIRFLOW-5523?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16993246#comment-16993246
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Vishesh Jain commented on AIRFLOW-5523:
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[~chrispalmer16] Here is a discussion thread for this Jira
<[https://lists.apache.org/thread.html/53b5a3bc63f39415850cd12c34ee2903aa6d132248d1e02a66816675%40%3Cdev.airflow.apache.org%3E]>
> DAGs never get cleaned up from webservers if DAG file is removed from the
> scheduler
> -----------------------------------------------------------------------------------
>
> Key: AIRFLOW-5523
> URL: https://issues.apache.org/jira/browse/AIRFLOW-5523
> Project: Apache Airflow
> Issue Type: Bug
> Components: webserver
> Affects Versions: 1.10.5
> Reporter: Dan Davydov
> Priority: Major
> Attachments: Screen Shot 2019-09-19 at 4.39.24 PM.png
>
>
> DAGs are never removed from the DB if the DAG file used to generate the DAGs
> is removed. This causes the webserver to accumulate broken dag rows (see
> attached screenshot).
> The scheduler should delete all DAGs from the DAG table with files that no
> longer exist when it scans the DAGs folder for files.
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