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https://issues.apache.org/jira/browse/KAFKA-20651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ibenchhida updated KAFKA-20651:
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Attachment: KAFKA-20651.patch
> Cache parsed KafkaPrincipal in StandardAcl.kafkaPrincipal()
> -----------------------------------------------------------
>
> Key: KAFKA-20651
> URL: https://issues.apache.org/jira/browse/KAFKA-20651
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 3.9.2
> Environment: KRaft clusters using StandardAuthorizer (3.4.0+)
> Reporter: ibenchhida
> Priority: Critical
> Labels: authorization, performance
> Attachments: KAFKA-20651.patch
>
>
> kafkaPrincipal() is called frequently during authorization (once per matching
> ACL). Each call parses the principal string and allocates a new
> KafkaPrincipal object.
> This adds a ConcurrentHashMap<String, KafkaPrincipal> cache to avoid
> redundant parsing and allocation. The cache is bounded by the number of
> distinct principal strings in the ACL store (typically orders of magnitude
> smaller than total ACL count).
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