hey, when I'm looking at CuratorZookeeperClient.java, I notice there is a field named 'persistentExistNodePath' which is designed to speed up api call between dubbo application and zookeeper registry.
My question is if some application (another dubbo application or a management system) delete a zookeeper node, CuratorZookeeperClient will not aware it and going to create sub node, then it will throw NodeNotFoundException. any one know the original design or more detail can share? [1]: https://github.com/apache/dubbo/blob/master/dubbo-remoting/dubbo-remoting-zookeeper/src/main/java/org/apache/dubbo/remoting/zookeeper/curator/CuratorZookeeperClient.java
