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https://issues.apache.org/jira/browse/KAFKA-10242?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17152494#comment-17152494
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Ming Liu commented on KAFKA-10242:
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The PR is [https://github.com/apache/kafka/pull/8982]
> Adding metrics to track the total count of idempotent producers that Broker
> need to track
> -----------------------------------------------------------------------------------------
>
> Key: KAFKA-10242
> URL: https://issues.apache.org/jira/browse/KAFKA-10242
> Project: Kafka
> Issue Type: Improvement
> Components: producer
> Affects Versions: 2.5.0
> Reporter: Ming Liu
> Priority: Critical
> Fix For: 2.6.0
>
>
> We found it is very useful to track the total number of idempotent producers
> that broker is tracking.
> In our production environment, we have many idempotent producers for a
> cluster and sometimes that number increased to very high number which
> requires some attention to mitigate.
> This is especially true for client (< 2.4) where the client retry might
> generate too many different idempotent producers which can trigger broker GC.
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