使用dubbo写测试例子出现问题,无法启动,求弄过dubbo的高手帮忙看看

启动提供方没什么问题,启东消费方就是报错,如下图片说明
这是怎么回事啊,急急急

2个回答

参考Dubbo 入门实例 本地伪集群测试Demo

没有提供者,就是说程序没有把服务注册到zookeeper

qq_32224861
June君 我用的multicast注册
4 年多之前 回复

提供者配置的端口有没有暴露出来

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dubbo消费者测试启动报错

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com.alibaba.dubbo.registry.support.FailbackRegistry.register(FailbackRegistry.java:144) at com.alibaba.dubbo.registry.integration.RegistryProtocol.register(RegistryProtocol.java:125) at com.alibaba.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:145) at com.alibaba.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:54) at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:98) at com.alibaba.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:55) at com.alibaba.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:506) at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:358) at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:317) at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:216) at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:123) at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:49) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:167) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:383) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:337) at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:882) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:545) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139) at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93) at com.ruyi.dubbo.demo.provider.Provider.main(Provider.java:19) Caused by: com.alibaba.dubbo.rpc.RpcException: Failed to register dubbo://169.254.165.91:20880/com.ruyi.dubbo.demo.DemoService?anyhost=true&application=dubbo-demo-provider&dubbo=2.6.2&generic=false&interface=com.ruyi.dubbo.demo.DemoService&methods=sayHello&pid=14868&side=provider&timestamp=1528802622329 to zookeeper zookeeper://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=dubbo-demo-provider&dubbo=2.6.2&interface=com.alibaba.dubbo.registry.RegistryService&pid=14868&qos.port=22222&timestamp=1528802622317, cause: KeeperErrorCode = ConnectionLoss at com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry.doRegister(ZookeeperRegistry.java:116) at com.alibaba.dubbo.registry.support.FailbackRegistry.register(FailbackRegistry.java:131) ... 21 more Caused by: java.lang.IllegalStateException: KeeperErrorCode = ConnectionLoss at com.alibaba.dubbo.remoting.zookeeper.curator.CuratorZookeeperClient.createPersistent(CuratorZookeeperClient.java:79) at com.alibaba.dubbo.remoting.zookeeper.support.AbstractZookeeperClient.create(AbstractZookeeperClient.java:65) at com.alibaba.dubbo.remoting.zookeeper.support.AbstractZookeeperClient.create(AbstractZookeeperClient.java:59) at com.alibaba.dubbo.remoting.zookeeper.support.AbstractZookeeperClient.create(AbstractZookeeperClient.java:59) at com.alibaba.dubbo.remoting.zookeeper.support.AbstractZookeeperClient.create(AbstractZookeeperClient.java:59) at com.alibaba.dubbo.registry.zookeeper.ZookeeperRegistry.doRegister(ZookeeperRegistry.java:114) ... 22 more Caused by: org.apache.curator.CuratorConnectionLossException: KeeperErrorCode = ConnectionLoss at org.apache.curator.ConnectionState.checkTimeouts(ConnectionState.java:225) at org.apache.curator.ConnectionState.getZooKeeper(ConnectionState.java:94) at org.apache.curator.CuratorZookeeperClient.getZooKeeper(CuratorZookeeperClient.java:117) at org.apache.curator.framework.imps.CuratorFrameworkImpl.getZooKeeper(CuratorFrameworkImpl.java:489) at org.apache.curator.framework.imps.CreateBuilderImpl$11.call(CreateBuilderImpl.java:740) at org.apache.curator.framework.imps.CreateBuilderImpl$11.call(CreateBuilderImpl.java:723) at org.apache.curator.RetryLoop.callWithRetry(RetryLoop.java:109) at org.apache.curator.framework.imps.CreateBuilderImpl.pathInForeground(CreateBuilderImpl.java:720) at org.apache.curator.framework.imps.CreateBuilderImpl.protectedPathInForeground(CreateBuilderImpl.java:484) at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:474) at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:454) at org.apache.curator.framework.imps.CreateBuilderImpl.forPath(CreateBuilderImpl.java:44) at com.alibaba.dubbo.remoting.zookeeper.curator.CuratorZookeeperClient.createPersistent(CuratorZookeeperClient.java:76) ... 27 more 项目结构为: dubbo-demo - dubbo-demo-api - com.ruyi.dubbo.demo.DemoService.java - dubbo-demo-provider - com.ruyi.dubbo.demo.provider.DemoServiceImpl - com.ruyi.dubbo.demo.provider.Provider - META-INF/spring/dubbo-demo-provider.xml - dubbo-demo-consumer dubbo-demo-api包含一个DemoService接口: public interface DemoService { String sayHello(String name); } dubbo-demo-provider包含一个类实现DemoService接口的DemoServiceImpl类: public class DemoServiceImpl implements DemoService { @Override public String sayHello(String name) { // TODO Auto-generated method stub return "Hello " + name; } } 以及一个Provider类: public class Provider { public static void main(String[] args) throws Exception { //Prevent to get IPV6 address,this way only work in debug mode //But you can pass use -Djava.net.preferIPv4Stack=true,then it work well whether in debug mode or not System.setProperty("java.net.preferIPv4Stack", "true"); ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[]{"META-INF/spring/dubbo-demo-provider.xml"}); context.start(); System.in.read(); // press any key to exit } } dubbo-demo-provider.xml: <?xml version="1.0" encoding="UTF-8"?> <!-- Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. --> <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dubbo="http://dubbo.apache.org/schema/dubbo" xmlns="http://www.springframework.org/schema/beans" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.3.xsd http://dubbo.apache.org/schema/dubbo http://dubbo.apache.org/schema/dubbo/dubbo.xsd"> <!-- provider's application name, used for tracing dependency relationship --> <dubbo:application name="dubbo-demo-provider"/> <!-- use multicast registry center to export service --> <!-- <dubbo:registry address="multicast://224.5.6.7:1234"/> --> <dubbo:registry address="zookeeper://127.0.0.1:2181"/> <!-- use dubbo protocol to export service on port 20880 --> <dubbo:protocol name="dubbo" port="20880"/> <!-- service implementation, as same as regular local bean --> <bean id="demoService" class="com.ruyi.dubbo.demo.provider.DemoServiceImpl"/> <!-- declare the service interface to be exported --> <dubbo:service interface="com.ruyi.dubbo.demo.DemoService" ref="demoService"/> </beans> dubbo-demo-consumer项目(略)

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Failed to bind to: /0.0.0.0:21889 at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:331) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.openServer(DubboProtocol.java:308) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.export(DubboProtocol.java:258) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:55) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:56) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.Protocol$Adpative.export(Protocol$Adpative.java) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.registry.integration.RegistryProtocol.doLocalExport(RegistryProtocol.java:153) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:107) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:53) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:54) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.Protocol$Adpative.export(Protocol$Adpative.java) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:489) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:285) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:246) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.config.ServiceConfig.export(ServiceConfig.java:145) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.config.spring.ServiceBean.onApplicationEvent(ServiceBean.java:109) ~[dubbo-2.8.3.jar:2.8.3] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:96) ~[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:334) ~[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:948) ~[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) ~[spring-context-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:410) ~[spring-web-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306) ~[spring-web-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) [spring-web-3.2.8.RELEASE.jar:3.2.8.RELEASE] at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:5003) [catalina.jar:7.0.65] at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5517) [catalina.jar:7.0.65] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:7.0.65] at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) [catalina.jar:7.0.65] at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) [catalina.jar:7.0.65] at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:652) [catalina.jar:7.0.65] at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1263) [catalina.jar:7.0.65] at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1978) [catalina.jar:7.0.65] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_80] at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_80] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_80] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_80] at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80] Caused by: com.alibaba.dubbo.remoting.RemotingException: Failed to bind NettyServer on /172.16.0.62:21889, cause: Failed to bind to: /0.0.0.0:21889 at com.alibaba.dubbo.remoting.transport.AbstractServer.<init>(AbstractServer.java:72) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.transport.netty.NettyServer.<init>(NettyServer.java:63) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.transport.netty.NettyTransporter.bind(NettyTransporter.java:33) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.Transporter$Adpative.bind(Transporter$Adpative.java) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.Transporters.bind(Transporters.java:48) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchanger.bind(HeaderExchanger.java:41) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.exchange.Exchangers.bind(Exchangers.java:63) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol.createServer(DubboProtocol.java:329) ~[dubbo-2.8.3.jar:2.8.3] ... 35 common frames omitted Caused by: org.jboss.netty.channel.ChannelException: Failed to bind to: /0.0.0.0:21889 at org.jboss.netty.bootstrap.ServerBootstrap.bind(ServerBootstrap.java:303) ~[netty-3.2.5.Final.jar:na] at com.alibaba.dubbo.remoting.transport.netty.NettyServer.doOpen(NettyServer.java:94) ~[dubbo-2.8.3.jar:2.8.3] at com.alibaba.dubbo.remoting.transport.AbstractServer.<init>(AbstractServer.java:67) ~[dubbo-2.8.3.jar:2.8.3] ... 42 common frames omitted Caused by: java.net.BindException: Address already in use: bind at sun.nio.ch.Net.bind0(Native Method) ~[na:1.7.0_80] at sun.nio.ch.Net.bind(Net.java:463) ~[na:1.7.0_80] at sun.nio.ch.Net.bind(Net.java:455) ~[na:1.7.0_80] at sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:223) ~[na:1.7.0_80] at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:74) ~[na:1.7.0_80] at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.bind(NioServerSocketPipelineSink.java:148) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.handleServerSocket(NioServerSocketPipelineSink.java:100) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.socket.nio.NioServerSocketPipelineSink.eventSunk(NioServerSocketPipelineSink.java:74) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.Channels.bind(Channels.java:468) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.AbstractChannel.bind(AbstractChannel.java:192) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.bootstrap.ServerBootstrap$Binder.channelOpen(ServerBootstrap.java:348) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.Channels.fireChannelOpen(Channels.java:176) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.socket.nio.NioServerSocketChannel.<init>(NioServerSocketChannel.java:85) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.newChannel(NioServerSocketChannelFactory.java:142) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory.newChannel(NioServerSocketChannelFactory.java:90) ~[netty-3.2.5.Final.jar:na] at org.jboss.netty.bootstrap.ServerBootstrap.bind(ServerBootstrap.java:282) ~[netty-3.2.5.Final.jar:na] ... 44 common frames omitted

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