## 问题描述
使用如下方式配置RegistryConfig bean时

```java
    @Bean
    public RegistryConfig registryConfig() {
        RegistryConfig registryConfig = new RegistryConfig();
        registryConfig.setProtocol("zookeeper");
        registryConfig.setAddress("localhost");
        registryConfig.setPort(2181);
        return registryConfig;
    }
```

提示无法与zookeeper建立连接，调试代码发现，zookeeper链接为

`zookeeper://localhost:9090/ConfigCenterConfig?check=true&config-file=dubbo.properties&group=dubbo&highest-priority=false&namespace=dubbo&timeout=3000`

使用了9090端口，未使用2181端口，registryConfig.setPort()不生效。

对比测试，使用registryConfig.setAddress("localhost:2181")方式可以生效。


}
        }
        if (selectedURL == null && CollectionUtils.isNotEmpty(urlValues)) {
            selectedURL = URL.valueOf(urlValues.iterator().next());
        }
        return selectedURL;
    }
    private void unregisterServiceInstance() {
        if (serviceInstance != null) {
            getServiceDiscoveries().forEach(serviceDiscovery -> {
                serviceDiscovery.unregister(serviceInstance);
            });
        }
    }
    private ServiceInstance createServiceInstance(String serviceName, String host, int port) {
        this.serviceInstance = new DefaultServiceInstance(serviceName, host, port);
        setMetadataStorageType(serviceInstance, getMetadataType());
        return this.serviceInstance;
    }
    public void destroy() {
        
        DubboShutdownHook.destroyAll();
        if (started.compareAndSet(true, false)
                && destroyed.compareAndSet(false, true)) {
            unregisterServiceInstance();
            unexportMetadataService();
            unexportServices();
            unreferServices();
            destroyRegistries();
            destroyProtocols();