dubbo项目启动失败，服务提供者注册失败java.lang.IllegalStateException: Failed to check the status of the service

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 cn.feezu.carsearch.service.DemoService. No provider available for the service cn.feezu.carsearch.service.DemoService from the url zookeeper://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=consumer-of-helloworld-app&default.timeout=5000&dubbo=2.5.3&interface=cn.feezu.carsearch.service.DemoService&methods=sayHello&pid=8148&side=consumer×tamp=1440572169099 to the consumer 10.10.8.101 use dubbo version 2.5.3  
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:151)  
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.getObjectFromFactoryBean(FactoryBeanRegistrySupport.java:103)  
    at org.springframework.beans.factory.support.AbstractBeanFactory.getObjectForBeanInstance(AbstractBeanFactory.java:1514)  
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:252)  
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)  
    at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:973)  
    at Main.main(Main.java:15)  
Caused by: java.lang.IllegalStateException: Failed to check the status of the service cn.feezu.carsearch.service.DemoService. No provider available for the service cn.feezu.carsearch.service.DemoService from the url zookeeper://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=consumer-of-helloworld-app&default.timeout=5000&dubbo=2.5.3&interface=cn.feezu.carsearch.service.DemoService&methods=sayHello&pid=8148&side=consumer×tamp=1440572169099 to the consumer 10.10.8.101 use dubbo version 2.5.3  
    at com.alibaba.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:420)  
    at com.alibaba.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:300)  
    at com.alibaba.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:138)  
    at com.alibaba.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:65)  
    at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:144)  
    ... 6 more  

之前项目还好好的，就下拉了个代码就不行了，别人下拉代码都没事，最后在网上看到某大神的解决方案，出现这种报错情况，问题可能有两种，第一种是服务提供者的dubbo-Spring的xml和消费者的版本不一致造成的，还有一种是因为防火墙的原因，（我就是这种原因），我把防火墙关了之后，项目maven刷新一下，然后就好了。