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https://issues.apache.org/jira/browse/SPARK-30285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcelo Masiero Vanzin reassigned SPARK-30285:
----------------------------------------------
Assignee: Wang Shuo
> Fix deadlock between LiveListenerBus#stop and
> AsyncEventQueue#removeListenerOnError
> -----------------------------------------------------------------------------------
>
> Key: SPARK-30285
> URL: https://issues.apache.org/jira/browse/SPARK-30285
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.3.0, 2.4.0
> Reporter: Wang Shuo
> Assignee: Wang Shuo
> Priority: Major
>
> There is a deadlock between LiveListenerBus#stop and
> AsyncEventQueue#removeListenerOnError.
> we can reproduce as follows:
> # Post some events to LiveListenerBus
> # Call LiveListenerBus#stop and hold the synchronized lock of bus, waiting
> until all the events are processed by listeners, then remove all the queues
> # Event queue would drain out events by posting to its listeners. If a
> listener is interrupted, it will call AsyncEventQueue#removeListenerOnError,
> inside it will call bus.removeListener, trying to acquire synchronized lock
> of bus, resulting in deadlock
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