As of now, kafka doesn't have the capability to automatically migrate followers to other brokers. We have to use kafka-reassign-partition.sh script.
On Sat, Apr 8, 2017 at 2:15 AM, Ramanan, Buvana (Nokia - US/Murray Hill) < buvana.rama...@nokia-bell-labs.com> wrote: > Hello, > > I have a 6 broker cluster, configured with auto.leader.rebalance.enable=false. > The broker ids are 1 thru 6. > > I have about 160 partitions for which I assigned the replicas to be 1,2,3 > (1 is the leader). When broker-2 underwent a controlled shutdown, the > 'kafka-topics.sh -describe' command showed the ISRs for these partitions to > be 1,3, which is an expected outcome. > > In case broker-2 is never going to come back alive, will Kafka be able to > automatically elect a new follower in the place of broker-2? In other > words, just like how a new leader is elected for a partition when its > leader goes down, is there a possibility that a new follower is chosen from > the list of available brokers? > > I understand that I can manually specify a new replica set and use > kafka-reassign-partition.sh to execute the reassignment. But I am looking > to see if Kafka does any follower assignment by itself. > > Thanks, > Buvana > > >
