Github user aajisaka commented on the issue:
https://github.com/apache/zookeeper/pull/676
@hanm It seems hard to make a new 2.x release. Patching itself is easy,
however, there is no branch for developing 2.x and no activity to release 2.x.
Please see https://issues.apache.org/jira/browse/CURATOR-409 for the detail.
(I'm not familiar with Apache Curator project, so I'm not sure how actually
hard it is.)---
