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- [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate.

### Environment

* Dubbo version: 3.0.9
* Operating System version: xxx
* Java version: xxx

### Steps to reproduce this issue

1. close registry : `<dubbo:registry id="registry1" address="N/A"/>`
2. start application 
3. telnet 127.0.0.1 22222

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

### Expected Behavior

connect success.

### Actual Behavior

telnet: connect to address 127.0.0.1: Connection refused


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package org.apache.dubbo.qos.protocol;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.common.utils.UrlUtils;
import org.apache.dubbo.qos.common.QosConstants;
import org.apache.dubbo.qos.server.Server;