equanz commented on PR #18254:
URL: https://github.com/apache/pulsar/pull/18254#issuecomment-1305417873

   In my understanding, old partitioned producer clients are not aggregated by 
producerName completely. So, this PR introduce breaking changes to them.
   Partitioned producers have the same producerName between partitions as 
default from https://github.com/apache/pulsar/pull/10279 commit.
   Therefore, I kept a list-indexed aggregation for backward compatibility.
   https://github.com/apache/pulsar/pull/12401
   I think we should not introduce breaking changes, at least between the same 
major versions.
   
   In addition, I think this approach doesn't *deprecate* a feature but removes 
a feature.
   Users can't disable `aggregatePublisherStatsByProducerName` from config.
   


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