I'm running 2.10-0.8.1.1, and rebalance will not trigger on it's own. From http://grokbase.com/t/kafka/users/14bj5ps9hp/partition-auto-rebalance#20141118rf39q8cs4sjh6vzjgdw92e37cw I think the leader imbalance means: For a single broker, add up all the partitions it is leading (Y), and count the ones for which it's not the preferred broker (X). The ratio of X:Y is the one being used.
I have about 10 topics spread between the 3 brokers, each with 4 or 8 partitions. If I restart broker A, wait 5 min, then restart B, leadership ends up entirely on C (even though A was in ISR when B went down). Nothing triggers on it's own. Triggering it manually works (with bin/kafka-preferred-replica-election.sh). Is there something I should be checking, or is there a downside to just adding a cron job to trigger replica election once an hour? Thanks Steve
