### Environment

* Dubbo version: 3.0.6
* Operating System version: windows10
* Java version: jdk1.8

### Steps to reproduce this issue

String loadbalance() default ClusterRules.EMPTY;



@Inherited
public @interface DubboService {
    /**
     * Interface class, default value is void.class
     */
    Class<?> interfaceClass() default void.class;
    /**
     * Interface class name, default value is empty string
     */
    String interfaceName() default "";
    /**
     * Service version, default value is empty string
     */
    String version() default "";
    /**
     * Service group, default value is empty string
     */
    String group() default "";
    /**
     * Service path, default value is empty string
     */
    String path() default "";
    /**
     * Whether to export service, default value is true
     */
    boolean export() default true;
    /**
     * Service token, default value is empty string
     */
    String token() default "";