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https://issues.apache.org/jira/browse/CASSANDRA-15177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16871004#comment-16871004
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Sam Tunnicliffe commented on CASSANDRA-15177:
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[~ben.manes] can't we just supply a different executor here:
[https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/auth/AuthCache.java#L221]
?
> Reloading of auth caches happens on the calling thread
> ------------------------------------------------------
>
> Key: CASSANDRA-15177
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15177
> Project: Cassandra
> Issue Type: Bug
> Components: Feature/Authorization
> Reporter: Sam Tunnicliffe
> Priority: Normal
>
> When Guava caches were replaced by their Caffeine equivalents in
> CASSANDRA-10855, the async reloading of stale AuthCache entries was lost due
> to the use of {{MoreExecutors.directExecutor()}} to provide the delegate
> executor. Under normal conditions, we can expect these operations to be
> relatively expensive, and in failure scenarios where replicas for the auth
> data are DOWN this will greatly increase latency, so they shouldn’t be done
> on threads servicing requests.
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