**注解中指定分组和在yaml中配置分组都无效**,导致指定了分组的无法访问

demo下载地址：https://wws.lanzoui.com/iE2BEsrb3nc

**dubbo3.0.1可以正常，升级到3.0.2无法访问，报下面的错。**

![image](https://user-images.githubusercontent.com/1773414/129695093-5b72d7da-d93b-49bb-981c-4234ec2b866c.png)


![image](https://user-images.githubusercontent.com/1773414/129683664-6c524e09-2422-4540-9894-28a4e8ab469e.png)



生产端：
![image](https://user-images.githubusercontent.com/1773414/129694805-4786164b-9c11-4c3e-bb9c-23d87b12d775.png)


消费端
![image](https://user-images.githubusercontent.com/1773414/129694877-052bb465-f5fe-44f4-a3a3-7c4265c1fcc7.png)


nacos控制台：
![image](https://user-images.githubusercontent.com/1773414/129680657-edacb8af-7825-45cf-996a-5cd60fcc4e56.png)



package org.apache.dubbo.registry.nacos;
import org.apache.dubbo.common.URL;
import org.apache.dubbo.common.function.ThrowableFunction;
import org.apache.dubbo.common.logger.Logger;
import org.apache.dubbo.common.logger.LoggerFactory;
import org.apache.dubbo.registry.client.AbstractServiceDiscovery;
import org.apache.dubbo.registry.client.ServiceDiscovery;
import org.apache.dubbo.registry.client.ServiceInstance;
import org.apache.dubbo.registry.client.event.ServiceInstancesChangedEvent;
import org.apache.dubbo.registry.client.event.listener.ServiceInstancesChangedListener;
import org.apache.dubbo.registry.nacos.util.NacosNamingServiceUtils;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.listener.NamingEvent;
import com.alibaba.nacos.api.naming.pojo.Instance;
import com.alibaba.nacos.api.naming.pojo.ListView;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import static org.apache.dubbo.common.function.ThrowableConsumer.execute;
import static org.apache.dubbo.registry.nacos.util.NacosNamingServiceUtils.createNamingService;
import static org.apache.dubbo.registry.nacos.util.NacosNamingServiceUtils.getGroup;
import static org.apache.dubbo.registry.nacos.util.NacosNamingServiceUtils.toInstance;
/**
 * Nacos {@link ServiceDiscovery} implementation
 *
 * @see ServiceDiscovery
 * @since 2.7.5
 */
public class NacosServiceDiscovery extends AbstractServiceDiscovery {