com.alibaba.nacos.api.exception.NacosException: instance already exist: 192.168.43.244:unknown:DEFAULT_1.0_true_false_DEFAULT

启动 samples-dubbo-business-call 的时候 会报这个异常 显示获取的port是unknown 并且无法注册
order storage account 是可以正常启动的

Reproduce the failure by starting samples-dubbo-business-call and compare its startup output with the order, storage, and account samples, which reportedly start normally. Trace the configuration and registration path that produces port "unknown" and the duplicate-instance error; done means the sample starts and registers successfully.

Written by the indexing model from the issue text.