dubbo启动消费者报错：No provider available for the service。。null

我遇到的问题是:
远程调用的注解需要指定版本号:

@Service
public class UserService {
    @Reference(version="0.0.1", timeout = 5000, check= false)//这一行加上就不会报空了
    TicketService ticketService;

    public  void  hello(){
        String ticket = ticketService.getTicket();
        System.out.println("买到票了:"+ticket);
    }
}