Most API changes have been done, 12 issues left. I expect the final release in October. Note that JGroups-4.0.0-SNAPSHOT is also generated (on every change, IIRC). Feedback appreciated! [1] http://belaban.blogspot.ch/2016/08/jgroups-400alpha1-released.html -- Bela Ban, JGroups lead (http://www.jgroups.org)