@Override
                            public void leftCluster() {
                                destroyed = true;
                                ClusterManager.removeListener(this);
                                log.debug("CacheFactory is not listening for cluster events anymore because it left the cluster");
                            }
Returns the node info for the given cluster node
@param nodeID The target cluster node 
@return The info for the cluster node or null if not found
xmppserver/src/main/java/org/jivesoftware/util/cache/CacheFactory.java