@Override
    public String toString() {
        return recoverableZooKeeper == null ? ""
                : Long.toHexString(this.recoverableZooKeeper
                        .getSessionId());
    }
Instantiate a ZooKeeper connection and watcher.
<p/>
Descriptive string that is added to zookeeper sessionid and used as identifier for this
instance.
inlong-tubemq/tubemq-server/src/main/java/org/apache/inlong/tubemq/server/common/zookeeper/ZooKeeperWatcher.java