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https://issues.apache.org/jira/browse/SPARK-33711?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17266217#comment-17266217
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Dongjoon Hyun commented on SPARK-33711:
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Thank you so much!
> Race condition in Spark k8s Pod lifecycle manager that leads to shutdowns
> --------------------------------------------------------------------------
>
> Key: SPARK-33711
> URL: https://issues.apache.org/jira/browse/SPARK-33711
> Project: Spark
> Issue Type: Bug
> Components: Kubernetes
> Affects Versions: 2.3.4, 2.4.7, 3.0.0, 3.1.0, 3.2.0
> Reporter: Attila Zsolt Piros
> Assignee: Attila Zsolt Piros
> Priority: Major
> Fix For: 3.2.0, 3.1.1
>
>
> Watching a POD (ExecutorPodsWatchSnapshotSource) informs about single POD
> changes which could wrongfully lead to detecting of missing PODs (PODs known
> by scheduler backend but missing from POD snapshots) by the executor POD
> lifecycle manager.
> A key indicator of this is seeing this log msg:
> "The executor with ID [some_id] was not found in the cluster but we didn't
> get a reason why. Marking the executor as failed. The executor may have been
> deleted but the driver missed the deletion event."
> So one of the problem is running the missing POD detection even when a single
> pod is changed without having a full consistent snapshot about all the PODs
> (see ExecutorPodsPollingSnapshotSource). The other could be a race between
> the executor POD lifecycle manager and the scheduler backend.
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