- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [ ] I have checked the [FAQ](https://github.com/apache/dubbo/blob/master/FAQ.md) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 2.7.4.1
* Java version: 1.8

### Actual Result

[https://github.com/apache/dubbo/blob/839d2a604e629ea9e96b964be09ae221e85312ba/dubbo-common/src/main/java/org/apache/dubbo/rpc/model/ApplicationModel.java#L80](https://github.com/apache/dubbo/blob/839d2a604e629ea9e96b964be09ae221e85312ba/dubbo-common/src/main/java/org/apache/dubbo/rpc/model/ApplicationModel.java#L80)

### Expected Result

```
initFrameworkExts
```
}
        MetadataReportConfig metadataReportConfig = metadataReportConfigs.iterator().next();
        ConfigValidationUtils.validateMetadataConfig(metadataReportConfig);
        if (!metadataReportConfig.isValid()) {
            return;
        }
        MetadataReportInstance.init(metadataReportConfig.toUrl());
    }
    /**
     * For compatibility purpose, use registry as the default config center when the registry protocol is zookeeper and
     * there's no config center specified explicitly.
     */
    private void useRegistryAsConfigCenterIfNecessary() {
        
        if (environment.getDynamicConfiguration().isPresent()) {
            return;
        }
        if (CollectionUtils.isNotEmpty(configManager.getConfigCenters())) {
            return;
        }
        configManager.getDefaultRegistries().stream()
                .filter(registryConfig -> registryConfig.getUseAsConfigCenter() == null || registryConfig.getUseAsConfigCenter())
                .forEach(registryConfig -> {
                    String protocol = registryConfig.getProtocol();
                    String id = "config-center-" + protocol + "-" + registryConfig.getPort();
                    ConfigCenterConfig cc = new ConfigCenterConfig();
                    cc.setId(id);
                    if (cc.getParameters() == null) {
                        cc.setParameters(new HashMap<>());
                    }