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

### Environment

* Dubbo version: 2.7.7
* Operating System version: win10
* Java version: 1.8

### Steps to reproduce this issue

1. xxx
2. xxx
3. xxx

Pls. provide [GitHub address] to reproduce this issue.

### Expected Behavior

<!-- What do you expect from the above steps？-->

### Actual Behavior

<!-- What actually happens? -->

If there is an exception, please attach the exception trace:

```
Just put your stack trace here!
```

class RpcException extends RuntimeException {
    public static final int UNKNOWN_EXCEPTION = 0;
    public static final int NETWORK_EXCEPTION = 1;
    public static final int TIMEOUT_EXCEPTION = 2;
    public static final int BIZ_EXCEPTION = 3;
    public static final int FORBIDDEN_EXCEPTION = 4;
    public static final int SERIALIZATION_EXCEPTION = 5;
    public static final int NO_INVOKER_AVAILABLE_AFTER_FILTER = 6;
    public static final int LIMIT_EXCEEDED_EXCEPTION = 7;
    public static final int TIMEOUT_TERMINATE = 8;
    public static final int REGISTRY_EXCEPTION = 9;
    public static final int ROUTER_CACHE_NOT_BUILD = 10;
    public static final int METHOD_NOT_FOUND = 11;
    private static final long serialVersionUID = 7815426752583648734L;
    /**