public static void doClusterTask(final ClusterTask<?> task, byte[] nodeID) {
        cacheFactoryStrategy.doClusterTask(task, nodeID);
    }
Invokes a task on a given cluster member in an asynchronous fashion. If clustering is not enabled,
this method will do nothing.

@param task the task to be invoked on the specified cluster member.
@param nodeID the byte array that identifies the target cluster member.
@throws IllegalStateException if requested node was not found or not running in a cluster.
xmppserver/src/main/java/org/jivesoftware/util/cache/CacheFactory.java