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https://issues.apache.org/jira/browse/KAFKA-10271?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17160024#comment-17160024
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John Roesler commented on KAFKA-10271:
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Bumped to 2.5.2, as the 2.5.1 release is already in progress.
> Performance degradation while fetching a key from a single partition
> --------------------------------------------------------------------
>
> Key: KAFKA-10271
> URL: https://issues.apache.org/jira/browse/KAFKA-10271
> Project: Kafka
> Issue Type: Bug
> Components: streams
> Affects Versions: 2.5.0, 2.6.0, 2.5.1
> Reporter: Dima R
> Assignee: Dima R
> Priority: Major
> Labels: KAFKA-10030, KAFKA-9445, KIP-562
> Fix For: 2.5.2, 2.6.1
>
> Attachments: 9020.png
>
>
> This is follow-up bug for KAFKA-10030
> StreamThreadStateStoreProvider excessive loop over calling
> internalTopologyBuilder.topicGroups(), which is synchronized, thus causing
> significant performance degradation to the caller, especially when store has
> many partitions.
>
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