The com.opensymphony.oscache.plugins.clustersupport.JavaGroupsBroadcastingListener class in OSCache version 2.0.2 references the following classes from JavaGroups:

import org.javagroups.Address;
import org.javagroups.Channel;
import org.javagroups.blocks.NotificationBus;

The current version of JavaGroups (version 2.2.1) does not use this package naming, but rather uses org.jgroups.xxx

Consequently any attempt to use the JavaGroups broadcast listener in OSCache results in abnormal ClassNotFound errors.

The correct import statements should appear as:

import org.jgroups.Address;
import org.jgroups.Channel;
import org.jgroups.blocks.NotificationBus;