The Apache ZooKeeper team is proud to announce our first official Apache release, version 3.0.0 of ZooKeeper. ZooKeeper is a high-performance coordination service for distributed applications. It exposes common services - such as naming, configuration management, synchronization, and group services - in a simple interface so you don't have to write them from scratch. You can use it off-the-shelf to implement consensus, group management, leader election, and presence protocols. And you can build on it for your own, specific needs. Version 3.0.0 is a major version upgrade from our previous 2.2.1 release on SourceForge, it addresses over 100 issues. If you are upgrading be sure to review the 3.0.0 release notes for migration instructions. For ZooKeeper release details and downloads, visit: ZooKeeper 3.0.0 Release Notes and Migration Instructions are at: Regards, The ZooKeeper Team