public boolean isZkNodeExistsException() {
        Throwable cause = getCause();
        if (cause != null && cause instanceof KeeperException) {
            return KeeperException.Code.NODEEXISTS != ((KeeperException) cause).code();
        }
        return false;
    }
@author Robert HG (254963746@qq.com) on 2/18/16.
lts-core/src/main/java/com/github/ltsopensource/zookeeper/lts/ZkException.java