Yeva Byzek created KAFKA-5245:
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Summary: KStream builder should capture serdes
Key: KAFKA-5245
URL: https://issues.apache.org/jira/browse/KAFKA-5245
Project: Kafka
Issue Type: Improvement
Components: streams
Affects Versions: 0.10.2.1, 0.10.2.0
Reporter: Yeva Byzek
Priority: Minor
Even if one specifies a serdes in `builder.stream`, later a call to
`groupByKey` may require the serdes again if it differs from the configured
streams app serdes. The preferred behavior is that if no serdes is provided to
`groupByKey`, it should use whatever was provided in `builder.stream` and not
what was in the app.
>From the current docs:
“When to set explicit serdes: Variants of groupByKey exist to override the
configured default serdes of your application, which you must do if the key
and/or value types of the resulting KGroupedStream do not match the configured
default serdes.”
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