Hi, We have a Kafka 0.8 cluster in a test environment (in this case, on AWS EC2 nodes). Even though we've tried to run very little load on this test cluster, it seems like the instances can't even keep up with that. Leadership moves automatically for at least a few of the topics, which never happens when we run them on our prod, non-AWS hardware. This causes us to eventually have to rebalance the topics on those test clusters, which is annoying.
Can any of you point me to the set of conditions/thresholds that have to be met for the Kafka cluster to decide to automatically move leadership of a topic/partition to another replica in the ISR? I'd like to understand how exactly Kafka does this, to see if we can provision an instance type for those test Kakfa clusters that can handle the load without moving leadership around. Thanks, Marcos Juarez
