public static void fireLeftCluster(byte[] nodeID) {
        try {
            Log.info("Firing left cluster event for another node:" + new String(nodeID, StandardCharsets.UTF_8));
            Event event = new Event(EventType.left_cluster, nodeID);
            events.put(event);
        } catch (InterruptedException e) {
            // Should never happen
            Log.error(e.getMessage(), e);
        }
    }
Triggers event indicating that another JVM is no longer part of the cluster. This could
happen when disabling clustering support or removing the enterprise plugin that provides
clustering support.

@param nodeID    nodeID assigned to the JVM when joining the cluster.
xmppserver/src/main/java/org/jivesoftware/openfire/cluster/ClusterManager.java