<!-- If you need to report a security issue please visit https://github.com/apache/dubbo/security/policy -->

- [ ] 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: 3.1.1
* Operating System version: macosx
* Java version: 17

### Steps to reproduce this issue
provider:
```
    <dubbo:protocol name="dubbo" serialization="fastjson2" port="20880"></dubbo:protocol>
    <dubbo:service protocol="dubbo" serialization="fastjson2" version="${dubbo.version:3.1.1}" loadbalance="roundrobin" interface="cn.app.service.TestService" timeout="50" registry="dubboRegistry"
                   ref="testService"/>
```
consumer:
The serialization method remains the same as hesian2
![image](https://user-images.githubusercontent.com/19943636/197732272-91b6260a-b23c-4e35-9ac1-980ce8bf75bd.png)
![image](https://user-images.githubusercontent.com/19943636/197732300-eb5fccec-0de0-4211-b240-a0fbd008c1ad.png)

Self-declared dubbo interfaces are normal
![image](https://user-images.githubusercontent.com/19943636/197733004-42fa2710-3ba3-4969-a302-b1706938c9e6.png)


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!
```

/**
     * Take the first element from the specified collection
     *
     * @param values the collection object
     * @param <T>    the type of element of collection
     * @return if found, return the first one, or <code>null</code>
     * @since 2.7.6
     */
    public static <T> T first(Collection<T> values) {
        if (isEmpty(values)) {
            return null;
        }
        if (values instanceof List) {
            List<T> list = (List<T>) values;
            return list.get(0);
        } else {
            return values.iterator().next();
        }
    }
    public static <T> Set<T> toTreeSet(Set<T> set) {
        if (isEmpty(set)) {
            return set;
        }
        if (!(set instanceof TreeSet)) {
            set = new TreeSet<>(set);
        }
        return set;
    }
}