I've slated the 3.0.1 fix release of ZooKeeper for the end of this week. https://issues.apache.org/jira/browse/ZOOKEEPER?report=com.atlassian.jira.plugin.system.project:roadmap-panel
Of particular interest are exists() NPE in ZOOKEEPER-226, and some perf issues ZOOKEEPER-212 & ZOOKEEPER-223
If there are any questions, or issues that should be included that are not, please speak up.
Patrick
