Apache Dubbo的demo报错Error creating bean with name 'demoService': FactoryBean thre

[scau-codeman]

最近刚刚学习apache dubbo，看了下官方文档，服务提供者注册服务成功，但是消费者调用服务失败抛异常，
异常堆栈信息如下：

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.UnsupportedOperationException
	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:197)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1080)
	at org.apache.dubbo.demo.init.Consumer.main(Consumer.java:13)
Caused by: java.lang.UnsupportedOperationException
	at java.util.concurrent.CopyOnWriteArrayList$COWIterator.set(CopyOnWriteArrayList.java:1185)
	at java.util.Collections.sort(Collections.java:170)
	at org.apache.dubbo.rpc.cluster.RouterChain.sort(RouterChain.java:87)
	at org.apache.dubbo.rpc.cluster.RouterChain.initWithRouters(RouterChain.java:67)
	at org.apache.dubbo.rpc.cluster.RouterChain.<init>(RouterChain.java:57)
	at org.apache.dubbo.rpc.cluster.RouterChain.buildChain(RouterChain.java:46)
	at org.apache.dubbo.registry.integration.RegistryDirectory.buildRouterChain(RegistryDirectory.java:622)
	at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:385)
	at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:367)
	at org.apache.dubbo.rpc.protocol.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:114)
	at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:70)
	at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:65)
	at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java)
	at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:366)
	at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:305)
	at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:231)
	at org.apache.dubbo.config.spring.ReferenceBean.getObject(ReferenceBean.java:71)
	at org.springframework.beans.factory.support.FactoryBeanRegistrySupport.doGetObjectFromFactoryBean(FactoryBeanRegistrySupport.java:170)
	... 6 more

消费者的代码如下：

package org.apache.dubbo.demo.init;

import org.apache.dubbo.demo.DemoService;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class Consumer {
	public static void main(String[] args) throws Exception {
		ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] {
				"classpath*:META-INF/spring/spring-config.xml"
		});
		context.start();
		System.out.println("[consumer] 服务已经启动");
		DemoService demoService = (DemoService) context.getBean("demoService");
		String hello = demoService.sayHello("world");
		System.out.println(hello);
		System.in.read();
	}
}

消费者服务配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:dubbo="http://dubbo.apache.org/schema/dubbo"
    xsi:schemaLocation="
    	http://www.springframework.org/schema/beans        
    	http://www.springframework.org/schema/beans/spring-beans.xsd        
    	http://dubbo.apache.org/schema/dubbo        
    	http://dubbo.apache.org/schema/dubbo/dubbo.xsd">
    	
 	<dubbo:application name="consumer-of-helloworld-app"/>
 	
 	<!--使用 zookeeper 注册中心暴露服务，这里使用不能用client="zkclient"否则会报错，详细原因见:
 		https://github.com/apache/incubator-dubbo/issues/4084
 	 -->
    <dubbo:registry address="zookeeper://127.0.0.1:2181" client="curator" />
    
    <!-- 用dubbo协议在20880端口暴露服务 -->
    <!-- dubbo:protocol name="dubbo" port="20880" /-->
    
    <dubbo:reference id="demoService" interface="org.apache.dubbo.demo.DemoService"/>
</beans>

提供者服务注册时正常的，如下图所示：


请大神指点，我是哪里出现了问题，导致调用服务抛这个异常

[ninuxGithub]

可以参考https://github.com/ninuxGithub/dubbo-study 感觉是的xml写的有问题

[axzzy]

<dubbo:reference id="demoService" interface="org.apache.dubbo.demo.DemoService"/> 把接口地址改为 org.apache.dubbo.demo.init试一下? 我用springboot写配置文件扫描的是消费者所在的包,不知道xml对不对

[axzzy]

好吧,可以不用看了,xml完全不一样,找别的方面问题吧

[scau-codeman]

我用的是apache dubbo2.7.1，在官方github上提问过说是开发者说是apache dubbo的bug，会在2.7.2版本中修复，我用了alibaba dubbo 2.6.6版本是可以正常跑的！

[南朝喧嚣]

你消费者没配xml吗