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

### Environment

* Dubbo version: xxx
* Operating System version: xxx
* Java version: xxx

### Steps to reproduce this issue

1. xxx
2. xxx
3. xxx

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

### Expected Result

What do you expected from the above steps？

### Actual Result

What actually happens?

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

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

}
    @Override
    public synchronized void notify(List<URL> urls) {
        List<URL> categoryUrls = urls.stream()
                .filter(this::isValidCategory)
                .filter(this::isNotCompatibleFor26x)
                .collect(Collectors.toList());
        /**
         * TODO Try to refactor the processing of these three type of urls using Collectors.groupBy()?
         */
        this.configurators = Configurator.toConfigurators(classifyUrls(categoryUrls, UrlUtils::isConfigurator))
                .orElse(configurators);
        toRouters(classifyUrls(categoryUrls, UrlUtils::isRoute)).ifPresent(this::addRouters);
        
        refreshOverrideAndInvoker(classifyUrls(categoryUrls, UrlUtils::isProvider));
    }
    private void refreshOverrideAndInvoker(List<URL> urls) {
        
        overrideDirectoryUrl();
        refreshInvoker(urls);
    }
    /**
     * Convert the invokerURL list to the Invoker Map. The rules of the conversion are as follows:
     * <ol>
     * <li> If URL has been converted to invoker, it is no longer re-referenced and obtained directly from the cache,
     * and notice that any parameter changes in the URL will be re-referenced.</li>
     * <li>If the incoming invoker list is not empty, it means that it is the latest invoker list.</li>
     * <li>If the list of incoming invokerUrl is empty, It means that the rule is only a override rule or a route
     * rule, which needs to be re-contrasted to decide whether to re-reference.</li>
     * </ol>