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https://issues.apache.org/jira/browse/AIRFLOW-428?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16622057#comment-16622057
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Nick Bauer commented on AIRFLOW-428:
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The PR ([https://github.com/apache/incubator-airflow/pull/1732]) is still
open... Is there another PR that resolves this? I don't believe this is truly
closed.
> Scheduler restart (via SIGKILL) leaves orphaned celery and airflow run
> processes
> --------------------------------------------------------------------------------
>
> Key: AIRFLOW-428
> URL: https://issues.apache.org/jira/browse/AIRFLOW-428
> Project: Apache Airflow
> Issue Type: Bug
> Reporter: Li Xuanji
> Assignee: Li Xuanji
> Priority: Major
>
> Airflow worker currently becomes a celery process. Sending a SIGTERM to it
> performs a warm shutdown which waits for tasks to exit. We use runit which
> will send a SIGKILL after some time passes; the SIGKILL causes the airflow
> run commands to be orphaned (parented onto PID 1 init, celery does not know
> about them).
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