@Override
    public void unsubscribe(Node node, NotifyListener listener) {
        try {
            super.unsubscribe(node, listener);

            removeFailedSubscribed(node, listener);

            doUnsubscribe(node, listener);

        } catch (Exception e) {
            addFailedUnsubscribed(node, listener);
        }
    }
@author Robert HG (254963746@qq.com) on 5/17/15.
lts-core/src/main/java/com/github/ltsopensource/core/registry/FailbackRegistry.java