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Posted to jira@kafka.apache.org by "Ismael Juma (Jira)" <ji...@apache.org> on 2020/06/01 00:49:00 UTC

[jira] [Commented] (KAFKA-10074) Improve performance of `matchingAcls`

    [ https://issues.apache.org/jira/browse/KAFKA-10074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17120660#comment-17120660 ] 

Ismael Juma commented on KAFKA-10074:
-------------------------------------

cc [~rhauch]

> Improve performance of `matchingAcls`
> -------------------------------------
>
>                 Key: KAFKA-10074
>                 URL: https://issues.apache.org/jira/browse/KAFKA-10074
>             Project: Kafka
>          Issue Type: Improvement
>            Reporter: Ismael Juma
>            Assignee: Ismael Juma
>            Priority: Critical
>             Fix For: 2.6.0
>
>
> A recent change in `matchingAcls` to remove `filterKeys` in favor of filtering inside `flatMap` caused a performance regression in cases where there are large number of topics, prefix ACLs and TreeMap.from/to filtering is ineffective. In such cases, we rely on string comparisons to exclude entries from the ACL cache that are not relevant.
> This issue is not present in any release yet, so we should include the simple fix in the 2.6 branch.



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