使用dubbo连接zookeeper集群时，消费者启动时出现节点已存在的异常。

提供者配置：
```
# 应用名称
spring:
application:
name: my-multi-registrycenter-provider

# 配置dubbo
dubbo:
registries:
provider1:
address: zookeeper://192.168.0.103
port: 2181
provider2:
address: zookeeper://192.168.0.140
port: 2181
provider3:
address: zookeeper://192.168.0.62
port: 2181
scan:
base-packages: com.ghy.www.my.multi.registrycenter.provider.service # 扫包
application:
logger: slf4j
```

消费者配置：
```
# 应用名称
spring:
application:
name: my-multi-registrycenter-consumer

server:
port: 8085

# 配置dubbo
dubbo:
registries:
provider1:
address: zookeeper://192.168.0.103
port: 2181
provider2:
address: zookeeper://192.168.0.140
port: 2181
provider3:
address: zookeeper://192.168.0.62
port: 2181
application:
logger: slf4j
```

服务提供者启动没有出现异常，而服务消费者启动出现异常。

3台zookeeper服务器集群状态正常。

[zk集群消费者启动报错.txt](https://github.com/apache/dubbo/files/8159413/zk.txt)