按照官方demo示例运行消费者调用服务创建bean异常

[huyihao]

按照官方demo写了一个生产者工程和消费者工程，生产者注册服务到zk上在dubbo-admin中显示正常，然后起了个消费者工程，消费服务报错
Error creating bean with name 'demoService': FactoryBean threw exception on object creation; nested exception is java.lang.UnsupportedOperationException

Environment

• Dubbo version: 2.7.1
• Operating System version: win8.1
• Java version: JDK1.8
• Zookeeper version: 3.4.9

code

1. 生产者

<?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="hello-world-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" />
    
    <!-- 声明需要暴露的服务接口 -->
    <dubbo:service interface="org.apache.dubbo.demo.DemoService" ref="demoService" />
 
    <!-- 和本地bean一样实现服务 -->
    <bean id="demoService" class="org.apache.dubbo.demo.provider.DemoServiceImpl" />         	
</beans>

2. 消费者

<?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" check="false"/>
</beans>

3. 测试代码

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();
	}
}

4. 报错堆栈信息

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

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

不知道有没有可能是哪些jar包引用的版本不对，我都是按照官方建议的jar包版本配的

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <apachedubbo.version>2.7.1</apachedubbo.version>
    <zookeeper.version>3.4.9</zookeeper.version>
    <zkclient.version>0.1</zkclient.version>
    <curator.version>2.12.0</curator.version>
  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    
	<!-- Apache Dubbo -->
	<dependency>
	    <groupId>org.apache.dubbo</groupId>
	    <artifactId>dubbo</artifactId>
	    <version>${apachedubbo.version}</version>
	</dependency>    
	
	<!-- Dubbo使用zk作为注册中心引入依赖: zookeeper、zkclient -->
	<dependency>
	    <groupId>org.apache.zookeeper</groupId>
	    <artifactId>zookeeper</artifactId>
	    <version>${zookeeper.version}</version>
	</dependency>
	<dependency>
	    <groupId>com.github.sgroschupf</groupId>
	    <artifactId>zkclient</artifactId>
	    <version>${zkclient.version}</version>
	</dependency>	
    
    <!-- 使用Java操作zk需要依赖的包 -->
    <dependency>
	    <groupId>org.apache.curator</groupId>
	    <artifactId>curator-client</artifactId>
	    <version>${curator.version}</version>
	</dependency>
	<dependency>
	    <groupId>org.apache.curator</groupId>
	    <artifactId>curator-framework</artifactId>
	    <version>${curator.version}</version>
	</dependency>	
	<dependency>
	    <groupId>org.apache.curator</groupId>
	    <artifactId>curator-recipes</artifactId>
	    <version>${curator.version}</version>
	</dependency>	
  </dependencies>

[xiehaib]

I guess, The wrong concurrency container was used in the RouterChain.initWithRouters()method,
or the wrong sort method was used in the RouterChain.sort()method.

Use CopyOnWriteArrayList.sort(Comparator<? super E> c) directly sort instead of use Collections.sort

Waiting for their confirmation.

[Leishunyu]

#3978
The bug has been fixed in 2.7.2

[huyihao]

#3978
The bug has been fixed in 2.7.2

It seems that version 2.7.2 has not been released yet. Which mirror source can I get this version from?