dubbo-admin service query empty results

[shihuaguo]

• [ ] 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: 2.7.6
• Operating System version: ubuntu
• Java version: 11.0.8

Steps to reproduce this issue

1. in nacos console,service list as bellow:

2. deploy dubbo-admin and start with option: java -Dadmin.config-center=nacos://127.0.0.1:8848 -Dadmin.registry.address=nacos://127.0.0.1:8848 -Dadmin.metadata-report.address=nacos://127.0.0.1:8848 -jar dubbo-admin-0.2.0-SNAPSHOT.jar

3. dubbo-admin service query result:

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

Expected Result

What do you expected from the above steps？ In dubbo-admin service query should display 4 services as in nacos console.

Actual Result

What actually happens? In dubbo-admin service query, the result is empty.