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https://issues.apache.org/jira/browse/KAFKA-9559?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Matthias J. Sax updated KAFKA-9559:
-----------------------------------
    Labels: kip  (was: needs-kip)

> Change the default "default serde" from ByteArraySerde to null
> --------------------------------------------------------------
>
>                 Key: KAFKA-9559
>                 URL: https://issues.apache.org/jira/browse/KAFKA-9559
>             Project: Kafka
>          Issue Type: Improvement
>          Components: streams
>            Reporter: A. Sophie Blee-Goldman
>            Assignee: Leah Thomas
>            Priority: Blocker
>              Labels: kip
>             Fix For: 3.0.0
>
>
> The current default "default serde" is not particularly useful, and in almost 
> all cases is intended to be overwritten either by setting the config 
> explicitly or by specifying serdes directly in the topology. If a user does 
> not set the config and misses specifying a serde they will get a runtime 
> ClassCastException once they start processing unless they are in fact 
> processing only bytes.
> We should change the default default to null, so that an exception will 
> instead be thrown immediately on startup if a user failed to specify a serde 
> somewhere in their topology and it falls back to the unset default.
>  



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