[23/07/19 05:30:24:024 CST] main ERROR integration.MetadataReportService:  [DUBBO] publishProvider getServiceDescriptor error. providerUrl: dubbo://30.5.121.125:20880/org.apache.dubbo.samples.generic.call.api.HelloService?anyhost=true&application=generic-impl-provider&deprecated=false&dubbo=2.0.2&dynamic=true&generic=true&interface=org.apache.dubbo.samples.generic.call.api.HelloService&methods=*&register=true&release=2.7.3&side=provider, dubbo version: 2.7.3, current host: 30.5.121.125
java.lang.ClassNotFoundException: org.apache.dubbo.samples.generic.call.api.HelloService
	at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:264)
	at org.apache.dubbo.metadata.integration.MetadataReportService.publishProvider(MetadataReportService.java:97)
	at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:623)
	at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:457)
	at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:415)
	at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:378)
	at org.apache.dubbo.samples.generic.call.GenericImplProvider.main(GenericImplProvider.java:48)

Reproduce by running dubbo-samples-generic-impl
/*if (u.isAnyHost() || u.isLocalHost()) {
            changed = true;
            host = NetUtils.getLocalHost();
        }*/
        if (port <= 0) {
            if (defaultPort > 0) {
                changed = true;
                port = defaultPort;
            } else {
                changed = true;
                port = 9090;
            }
        }
        if (path == null || path.length() == 0) {
            if (defaultPath != null && defaultPath.length() > 0) {
                changed = true;
                path = defaultPath;
            }
        }
        if (defaultParameters != null && defaultParameters.size() > 0) {
            for (Map.Entry<String, String> entry : defaultParameters.entrySet()) {
                String key = entry.getKey();
                String defaultValue = entry.getValue();
                if (defaultValue != null && defaultValue.length() > 0) {
                    String value = parameters.get(key);
                    if (StringUtils.isEmpty(value)) {
                        changed = true;
                        parameters.put(key, defaultValue);
                    }
                }