HBase Change Log Branch 0.90.0 - Master Rewrite Branch INCOMPATIBLE CHANGES BUG FIXES IMPROVEMENTS HBASE-2695 [MasterStatus] HMaster cleanup and refactor (Karthik R via jgray) HBASE-2695 [MasterStatus-part2.1] HMaster clean and refactor (Karthik R via jgray) HBASE-2696 [part1-v5-NewClasses_RS_Tested] ZooKeeper cleanup and refactor HBASE-2696 Re-enabled TestZooKeeper.testRegionServerSessionExpired HBASE-2699 [LoadBalancer-v5] Reimplement load balancing to be a background process and to not use heartbeats HBASE-2695 [MasterStartupCleanup-v4] Cleans up the master startup, adds new ZK tool ActiveMasterManager for master-side (part of master cleanup and refactor) HBASE-2696 [part2-v2-FinishRS_FixClient] ZooKeeper cleanup and refactor HBASE-2695 [ZK-Master-Final-v4] Rest of Master/ZK cleanup and refactor HBASE-2697 [part-v10] The big one! NEW FEATURES OPTIMIZATIONS