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https://issues.apache.org/jira/browse/KAFKA-6936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16497375#comment-16497375
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Guozhang Wang commented on KAFKA-6936:
--------------------------------------

[~DannyNullZwo] The PR has been merged to trunk, could you try it out and see 
if it resolved your needs?

> Scala API Wrapper for Streams uses default serializer for table aggregate
> -------------------------------------------------------------------------
>
>                 Key: KAFKA-6936
>                 URL: https://issues.apache.org/jira/browse/KAFKA-6936
>             Project: Kafka
>          Issue Type: Bug
>          Components: streams
>    Affects Versions: 2.0.0
>            Reporter: Daniel Heinrich
>            Priority: Major
>
> On of the goals of the Scala API is to not fall back on the configured 
> default serializer, but let the compiler provide them through implicits.
> The aggregate method on KGroupedStream misses to achieve this goal.
> Compared to the Java API is this behavior very supprising, because no other 
> stream operation falls back to the default serializer and a developer assums, 
> that the compiler checks for the correct serializer type.



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