### Environment * Dubbo version: latest version * Operating System version: LINUX & WINDOWS * Java version: 1.8
### Steps to reproduce this issue 必现哦 Pls. provide [GitHub address] to reproduce this issue. ### Expected Result VERSION_KEY和GROUP_KEY为空时，注册到NACOS的服务名不带双冒号后缀。 ### Actual Result What actually happens? VERSION_KEY和GROUP_KEY为空时，注册到NACOS的服务名有双冒号后缀，与alibaba实现不一致。 alibaba实现是为空时无双冒号后缀。 [ Full content available at: https://github.com/apache/dubbo/issues/5442 ] This message was relayed via gitbox.apache.org for [email protected]
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