- [x] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.
- [x] 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: 2.7.3
* Operating System version: Mac
* Java version: 1.8

### Steps to reproduce this issue

1.  `org/apache/dubbo/registry/support/ProviderConsumerRegTable.java:65` Type 'ProviderInvokerWrapper<>' does not define hashCode(), but is used in a hashing data-structure.
2. Class overrides equals but not hashCode.
* org.apache.dubbo.config.AbstractConfig
* org.apache.dubbo.registry.support.ProviderInvokerWrapper
* org.apache.dubbo.remoting.buffer.AbstractChannelBuffer

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

### Expected Result

Whether the above suggestions can be fixed or have other considerations

### Actual Result

Is it considered a bug? Will it fix?

}
            } catch (Exception e) {
                throw new IllegalStateException(e.getMessage(), e);
            }
        }
    }
    @Deprecated
    protected static void appendAttributes(Map<String, Object> parameters, Object config) {
        appendAttributes(parameters, config, null);
    }
    @Deprecated
    protected static void appendAttributes(Map<String, Object> parameters, Object config, String prefix) {
        if (config == null) {
            return;
        }
        Method[] methods = config.getClass().getMethods();
        for (Method method : methods) {
            try {
                Parameter parameter = method.getAnnotation(Parameter.class);
                if (parameter == null || !parameter.attribute()) {
                    continue;
                }
                String name = method.getName();
                if (MethodUtils.isGetter(method)) {
                    String key;
                    if (parameter.key().length() > 0) {
                        key = parameter.key();
                    } else {
                        key = calculateAttributeFromGetter(name);
                    }