How are you checking these metrics? They are per leader. That is, if broker A is the leader for topic partition topic-0 and broker B is a follower, then shutting down broker B should cause the IsrShrinksPerSec for broker A to be updated. You would also something like the following in the server.log of broker A:
"Shrinking ISR from %s to %s" Ismael On Tue, Apr 17, 2018 at 8:11 AM, Stanislav Antic <stanislav.an...@gmail.com> wrote: > Problems are: > * JMX attribute: > `kafka.server<type=ReplicaManager,name=IsrShrinksPerSec><Count>` > Is always 0 for `Count` and all other attributes. If I shutdown any > broker I > would expect that this would increase. > > * JMX attribute: > `kafka.server<type=ReplicaManager,name=IsrExpandsPerSec><Count>` > Have random behavior sometimes on shutting down broker it increases and > on starting it also > increases. Expands works I just don't understand what are values that > increments total on > each broker. > > This behaviours are consistent through Kafka versions: 0.10.0 - 1.0.0 > I'm using Confluent Kafka distribution with versions between: 3.1, 3.2, 3.3 > & 4.0 > > My question is this bug or something that I don't understand about Kafka? > -- > Stanislav Antic >
