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https://issues.apache.org/jira/browse/KAFKA-17926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17895348#comment-17895348
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Federico Valeri commented on KAFKA-17926:
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This makes sense. Thanks for the clarification.
> Improve the documentation explaining why
> max.in.flight.requests.per.connection should not exceed 5.
> ---------------------------------------------------------------------------------------------------
>
> Key: KAFKA-17926
> URL: https://issues.apache.org/jira/browse/KAFKA-17926
> Project: Kafka
> Issue Type: Improvement
> Reporter: Chia-Ping Tsai
> Assignee: PoAn Yang
> Priority: Minor
>
> We should highlight that the server [0] retains record metadata for the 5
> most recent batches, so sending too many requests to a node simultaneously
> can break idempotence.
> [0]
> https://github.com/apache/kafka/blob/af53758746485daa06c4d4366036c04f7f9f0e63/storage/src/main/java/org/apache/kafka/storage/internals/log/ProducerStateEntry.java#L32
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