We deployed a Samza process that effectively doubled our fetch rates in our cluster and noticed a significant drop fetch-follower requests. What is the difference between fetch-consumer and fetch-follower?
[image: Inline image 1] We noticed that some topics moved along undisturbed, sending in the same rate of data they had been before. Other topics saw a drop in traffic. It seems like the pattern is that the topics with reduced message rate were derived from our source topics, ie consumers of a source topic that published to another topic. It doesn't seem like we hit any sort of machine resource limits. We're well under network, CPU, and disk IO utilization. This is a 6 node cluster with all topics replicated 3 times (ie, one leader, two followers). Any thoughts on what might have happened? Thanks, Wes