Details
Minor Description
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.”