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

### Environment

* Dubbo version: 2.7.7-SNAPSHOT
* Operating System version: MacOS
* Java version: OpenJDK 13

### Steps to reproduce this issue

1. Open the dubbo-demo-xml project
2. Modify the registry center both of provider and consumer to Nacos；Open the check switch of consumer
3. Run the provider
4.Run the consumer

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

### Expected Result

The rpc can work properly.

### Actual Result

It fails.

If there is an exception, please attach the exception trace:

```
Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'demoService': FactoryBean threw exception on object creation; nested exception is java.lang.IllegalStateException: Failed to check the status of the service org.apache.dubbo.demo.DemoService. No provider available for the service org.apache.dubbo.demo.DemoService from the url nacos://127.0.0.1:8848/org.apache.dubbo.registry.RegistryService?application=demo-consumer&dubbo=2.0.2&init=false&interface=org.apache.dubbo.demo.DemoService&methods=sayHello,sayHelloAsync&pid=90344&qos.port=33333&register.ip=127.0.0.1&side=consumer&sticky=false&timestamp=1584323664330 to the consumer 127.0.0.1 use dubbo version 
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:177)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1640)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:254)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1086)
	at org.apache.dubbo.demo.consumer.Application.main(Application.java:33)
Caused by: java.lang.IllegalStateException: Failed to check the status of the service org.apache.dubbo.demo.DemoService. No provider available for the service org.apache.dubbo.demo.DemoService from the url nacos://127.0.0.1:8848/org.apache.dubbo.registry.RegistryService?application=demo-consumer&dubbo=2.0.2&init=false&interface=org.apache.dubbo.demo.DemoService&methods=sayHello,sayHelloAsync&pid=90344&qos.port=33333&register.ip=127.0.0.1&side=consumer&sticky=false&timestamp=1584323664330 to the consumer 127.0.0.1 use dubbo version 
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:350)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:258)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:158)
	at org.apache.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:68)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:170)
	... 6 more
```
/**
         * Tests whether or not the specified data should be accepted.
         *
         * @param data The data to be tested
         * @return <code>true</code> if and only if <code>data</code>
         * should be accepted
         */
        boolean accept(T data);
    }
    /**
     * {@link NamingService} Callback
     *
     * @since 2.6.5
     */
    interface NamingServiceCallback {
        /**
         * Callback
         *
         * @param namingService {@link NamingService}
         * @throws NacosException
         */
        void callback(NamingService namingService) throws NacosException;
    }
}