[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
}
    public static boolean isConfigurator(URL url) {
        return OVERRIDE_PROTOCOL.equals(url.getProtocol()) ||
                CONFIGURATORS_CATEGORY.equals(url.getParameter(CATEGORY_KEY, DEFAULT_CATEGORY));
    }
    public static boolean isRoute(URL url) {
        return ROUTE_PROTOCOL.equals(url.getProtocol()) ||
                ROUTERS_CATEGORY.equals(url.getParameter(CATEGORY_KEY, DEFAULT_CATEGORY));
    }
    public static boolean isProvider(URL url) {
        return !OVERRIDE_PROTOCOL.equals(url.getProtocol()) &&
                !ROUTE_PROTOCOL.equals(url.getProtocol()) &&
                PROVIDERS_CATEGORY.equals(url.getParameter(CATEGORY_KEY, PROVIDERS_CATEGORY));
    }
    /**
     * Check if the given value matches the given pattern. The pattern supports wildcard "*".
     *
     * @param pattern pattern
     * @param value   value
     * @return true if match otherwise false
     */
    static boolean isItemMatch(String pattern, String value) {
        if (pattern == null) {
            return value == null;
        } else {
            return "*".equals(pattern) || pattern.equals(value);
        }
    }
}