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https://issues.apache.org/jira/browse/IMPALA-8763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16885454#comment-16885454
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Tim Armstrong commented on IMPALA-8763:
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I think adding a separate topic would solve the worst part of this -
permanently stale functions. It still doesn't provide strong consistency -
there are still races with query execution, but that should be very rare.
> Dedicated executors not invalidating stale LibCache entries
> -----------------------------------------------------------
>
> Key: IMPALA-8763
> URL: https://issues.apache.org/jira/browse/IMPALA-8763
> Project: IMPALA
> Issue Type: Bug
> Reporter: Quanlong Huang
> Priority: Major
>
> This is a follow-up Jira for IMPALA-8486. Dedicated executors won't receive
> any catalog updates since they don't subscribe to the catalog-update topic.
> This causes them unable to notice whether a libCache entry is stale.
> We may need to introduce a new topic for the dedicated executors to subscribe
> to invalidate the stale libCache entries.
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