- [ ] 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
```
import org.apache.dubbo.config.context.ConfigManager;
import org.apache.dubbo.config.metadata.ConfigurableMetadataServiceExporter;
import org.apache.dubbo.config.utils.ConfigValidationUtils;
import org.apache.dubbo.config.utils.ReferenceConfigCache;
import org.apache.dubbo.event.EventDispatcher;
import org.apache.dubbo.event.EventListener;
import org.apache.dubbo.event.GenericEventListener;
import org.apache.dubbo.metadata.MetadataService;
import org.apache.dubbo.metadata.MetadataServiceExporter;
import org.apache.dubbo.metadata.WritableMetadataService;
import org.apache.dubbo.metadata.report.MetadataReportInstance;
import org.apache.dubbo.registry.client.DefaultServiceInstance;
import org.apache.dubbo.registry.client.ServiceDiscovery;
import org.apache.dubbo.registry.client.ServiceDiscoveryRegistry;
import org.apache.dubbo.registry.client.ServiceInstance;
import org.apache.dubbo.registry.support.AbstractRegistryFactory;
import org.apache.dubbo.rpc.Protocol;
import org.apache.dubbo.rpc.model.ApplicationModel;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.Condition;