zrlw opened a new issue #8959:
URL: https://github.com/apache/dubbo/issues/8959
### Environment
* Dubbo version: 3.0 / master
```List<ServiceInstance> serviceInstances =
discovery.getInstances(SERVICE_NAME);```需要等待注册完成后再执行，否则后面的断言就就会失败，比如3.0的github构建日志：
```
ZookeeperServiceDiscoveryTest.testRegistration:92 expected: <true> but
was: <false>
```
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