Sam Tunnicliffe created CASSANDRA-15177:
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Summary: 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, Legacy/Local Write-Read Paths
Reporter: Sam Tunnicliffe
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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