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操作步骤如下：
1. k8s环境下，consumer端开启mesh模式
2. consumer端需要调用多个provider
3. provider有应用级注册和接口级注册，并且需要的provider不再同一个namespace下
4. 原有项目存在dubbo2.6与3.1多版本间的相互调用，在开启消费端mesh（dubbo3.1）后，无法调用到2.6的服务提供者

**问题：**

1. 如何实现在一个consumer下，调用多个namespace下的provider，并且provider有应用级注册和接口级注册
2. dubbo3.1消费端在开启mesh后，如何调用版本是2.6的服务提供者
}
    }
    /**
     * Parse the directly configured url.
     */
    private void parseUrl(Map<String, String> referenceParameters) {
        String[] us = SEMICOLON_SPLIT_PATTERN.split(url);
        if (ArrayUtils.isNotEmpty(us)) {
            for (String u : us) {
                URL url = URL.valueOf(u);
                if (StringUtils.isEmpty(url.getPath())) {
                    url = url.setPath(interfaceName);
                }
                url = url.setScopeModel(getScopeModel());
                url = url.setServiceModel(consumerModel);
                if (UrlUtils.isRegistry(url)) {
                    urls.add(url.putAttribute(REFER_KEY, referenceParameters));
                } else {
                    URL peerUrl = getScopeModel().getApplicationModel().getBeanFactory().getBean(ClusterUtils.class).mergeUrl(url, referenceParameters);
                    peerUrl = peerUrl.putAttribute(PEER_KEY, true);
                    urls.add(peerUrl);
                }
            }
        }
    }
    /**
     * Get URLs from the registry and aggregate them.
     */
    private void aggregateUrlFromRegistry(Map<String, String> referenceParameters) {
        checkRegistry();