• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.7.5
• Zookeeper version: 3.4.14
• Operating System version: macos
• Java version: 1.8

Steps to reproduce this issue

1. 按官方文档搭建provider，两种方式：annotation/xml
2. 分别配置

    <dubbo:metadata-report address="zookeeper://127.0.0.1:2181"/>

        @Bean
        public MetadataReportConfig metadataReportConfig() {
            MetadataReportConfig metadataReportConfig = new MetadataReportConfig();
            metadataReportConfig.setAddress("zookeeper://127.0.0.1:2181");
            return metadataReportConfig;
        }

3. 应用正常启动
4. Consumer端正常调用
5. 观察Zookeeper节点数据，元数据节点/dubbo/metadata 未创建

Expected Result

元数据正常上报

Actual Result

元数据节点在Zookeeper上未创建，元数据未上报

将dubbo版本号更改为2.7.4.1、2.7.3，代码或配置未改动，元数据正常上报