[jira] [Commented] (KAFKA-13298) Improve documentation on EOS KStream requirements

["Andy Chambers (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/KAFKA-13298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17419166#comment-17419166 ] 

Andy Chambers commented on KAFKA-13298:
---------------------------------------

I made a PR for this but initially did not use the correct title format which I suppose is why it was never automatically linked. Sorry about that. But here is a link to the PR.

 

https://github.com/apache/kafka/pull/11355

> Improve documentation on EOS KStream requirements
> -------------------------------------------------
>
>                 Key: KAFKA-13298
>                 URL: https://issues.apache.org/jira/browse/KAFKA-13298
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>    Affects Versions: 2.8.0
>            Reporter: F Méthot
>            Priority: Trivial
>
> After posting question on a kafka forum, the following was revealed by kafka developer:
> {quote}Is there minimum replication factor required to enable exactly_once for topic involved in transactions?
> {quote}
> "Well, technically you can configure the system to use EOS with any replication factor. However, using a lower replication factor than 3 effectively voids EOS. Thus, it’s strongly recommended to use a replication factor of 3."
>  
> This should be clearly documented in the stream doc:
> [https://kafka.apache.org/28/documentation/streams/developer-guide/config-streams.html]
> Which refers to this broker link
> [https://kafka.apache.org/28/documentation/streams/developer-guide/config-streams.html#streams-developer-guide-processing-guarantedd]
>  
>  



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