The best replacement for jgroups is jms.

The best alternatives to jgroups are rated as following:
★★★★★  jms
★★★★  hazelcast
★★★★  zookeeper
★★  shoal
★  jxta
★  mina

Your alternative for jgroups is not listed? Suggest!
Speaking about jgroups, one probably shouldn't forget about ehcache.

Other search terms related to jgroups and their ratings are:
★★★★★ ehcache
You have in mind a companion for jgroups and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of jgroups in all years. Click on graph for more.
jgroups
jms
hazelcast