Hi, We are upgrading from zookeeper 3.4.8 to 3.5.8 via 3.4.14. There are several mentions of going from 3.4.6 to 3.5.8, is going from 3.4.14 to 3.5.8 ok.
In terms of Leader-tasks running during the upgrade. The intent is to migrate a cluster of 3 zk nodes by: * scaling up to 5 nodes (adding two new nodes) * one non-leader node at a time; destroying the instance and replacing it with a new 3.5.8 node * then stoping zk on the leader so another node becomes the leader, terminating the instance then adding a 3.5.8 node. * removing two (non-leader) node to scale back to 3 nodes With this process; will leader tasks running on the 3.4.14 leader (using curator leaderLatch) fail when this leader is terminated but succeed if run after a short delay will run on a new 3.5.8 leader node. Thanks, James -- Sent from: http://zookeeper-user.578899.n2.nabble.com/
