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  • Adding a config enable.dynamic.config to producers and consumers to enable the feature. Adding the dynamic config supported.configs is a better alternative since the user doesn't have to remember what types of clients support the capability but instead can just see which entities have clients that are registered along with the configs that are supported for each software name and versionThis defaulted to true anyway so it was removed.

  • Making certain client configurations topic level configurations on the broker.

    • The semantic for the ProduceRequest API would be undefined since the producer would not receive a response with an offset for the ProduceRequests with acks=0.

    • If this were implemented for acks there would also be quite a bit of overhead associated with extra round trips since the RecordAccumulator sends batches that may contain records from multiple topics. If these topics have different acks configurations the records would need to be sent in different batches based on the acks value.

    • For example, if a producer is consistently producing to 2 different topics and one is configured as acks=0 while the other is acks=-1. This would require twice the amount of round trips to produce the same number of messages.