Zookeeper 服务消费方 NullPointerException

@Controller
public class HelloAction {

    // 远程去服务提供方将 service 的实现类注入进来
    @Reference
    private HelloService helloService;

    @GetMapping("hello")
    @ResponseBody
    public String sayHi(String name){
        return helloService.sayHello(name);
    }

}

java.lang.NullPointerException
    com.renda.controller.HelloAction.sayHi(HelloAction.java:)
    java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:)
    java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)
    java.base/java.lang.reflect.Method.invoke(Method.java:)
    org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:)
...

package com.renda.service.impl;
import com.alibaba.dubbo.config.annotation.Service;
import com.renda.service.HelloService;

@Service
public class HelloServiceImpl implements HelloService {
    public String sayHello(String name) {
        return "Hello " + name;
    }
}