zyxdSTU opened a new issue, #10300: URL: https://github.com/apache/dubbo/issues/10300
<!-- If you need to report a security issue please visit https://github.com/apache/dubbo/security/policy --> - [ ] I have searched the [issues](https://github.com/apache/dubbo/issues) of this repository and believe that this is not a duplicate. ### Environment * Dubbo version: 3.0.9 * Operating System version: centos * Java version: 1.8 * dubbo-rpc-hessian: 2.7.15 ### Steps to reproduce this issue 1. provider注册，hessian协议服务 2. consumer订阅provider提供的hessian协议服务 3. 报错``Failed to refer invoker for interface:interface org.zjvis.datacenter.service.asset.DownloadAssetService`` ### Expected Behavior <!-- What do you expect from the above steps？--> 正常订阅hessian协议服务 ### Actual Behavior <!-- What actually happens? --> 服务端抛出异常 ``` 6370 [main] ERROR org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory - [DUBBO] Failed to refer invoker for interface:interface org.zjvis.datacenter.service.asset.DownloadAssetService,url:(DefaultServiceInstance{serviceName='datacenter-api-local-asda', host='10.11.33.60', port=20882, enabled=true, healthy=true, metadata={dubbo.metadata-service.url-params={"connections":"1","version":"1.0.0","dubbo":"2.0.2","release":"3.0.9","side":"provider","port":"20881","protocol":"dubbo"}, dubbo.endpoints=[{"port":20882,"protocol":"hessian"},{"port":20881,"protocol":"dubbo"}], dubbo.metadata.revision=ccd36a9506fdfe3585952f41f48bc66b, dubbo.metadata.storage-type=local, timestamp=1657502667429}}, service{name='org.zjvis.datacenter.service.asset.DownloadAssetService',group='null',version='null',protocol='hessian',params={side=provider, metrics.protocol=dubbo, release=3.0.9, methods=downloadDataPattern, logger=slf4j, deprecated=false, dubbo=2.0.2, interface=org.zjvis.datacenter.se rvice.asset.DownloadAssetService, service-name-mapping=true, timeout=10000000, generic=false, metrics.port=20881, application=datacenter-api-local-asda, payload=104857600, hessian.overload.method=true, background=false, dynamic=true, service.filter=metrics, anyhost=true},})null, dubbo version: 3.0.9, current host: 10.11.33.60 java.lang.NullPointerException at org.apache.dubbo.common.URL.setProtocol(URL.java:347) at org.apache.dubbo.rpc.protocol.hessian.HessianProtocol.doRefer(HessianProtocol.java:136) at org.apache.dubbo.rpc.protocol.AbstractProxyProtocol.protocolBindingRefer(AbstractProxyProtocol.java:109) at org.apache.dubbo.rpc.protocol.AbstractProtocol.refer(AbstractProtocol.java:133) at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:77) at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:85) at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:74) at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.refer(ProtocolSerializationWrapper.java:52) at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.toInvokers(ServiceDiscoveryRegistryDirectory.java:294) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.refreshInvoker(ServiceDiscoveryRegistryDirectory.java:225) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.refreshOverrideAndInvoker(ServiceDiscoveryRegistryDirectory.java:153) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.notify(ServiceDiscoveryRegistryDirectory.java:147) at org.apache.dubbo.registry.client.event.listener.ServiceInstancesChangedListener.addListenerAndNotify(ServiceInstancesChangedListener.java:231) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.subscribeURLs(ServiceDiscoveryRegistry.java:321) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.doSubscribe(ServiceDiscoveryRegistry.java:216) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistry.subscribe(ServiceDiscoveryRegistry.java:184) at org.apache.dubbo.registry.ListenerRegistryWrapper.subscribe(ListenerRegistryWrapper.java:111) at org.apache.dubbo.registry.integration.DynamicDirectory.subscribe(DynamicDirectory.java:180) at org.apache.dubbo.registry.client.ServiceDiscoveryRegistryDirectory.subscribe(ServiceDiscoveryRegistryDirectory.java:107) at org.apache.dubbo.registry.integration.RegistryProtocol.doCreateInvoker(RegistryProtocol.java:570) at org.apache.dubbo.registry.integration.InterfaceCompatibleRegistryProtocol.getServiceDiscoveryInvoker(InterfaceCompatibleRegistryProtocol.java:65) at org.apache.dubbo.registry.client.migration.MigrationInvoker.refreshServiceDiscoveryInvoker(MigrationInvoker.java:436) at org.apache.dubbo.registry.client.migration.MigrationInvoker.migrateToApplicationFirstInvoker(MigrationInvoker.java:244) at org.apache.dubbo.registry.client.migration.MigrationRuleHandler.refreshInvoker(MigrationRuleHandler.java:73) at org.apache.dubbo.registry.client.migration.MigrationRuleHandler.doMigrate(MigrationRuleHandler.java:57) at org.apache.dubbo.registry.client.migration.MigrationRuleListener.onRefer(MigrationRuleListener.java:243) at org.apache.dubbo.registry.integration.RegistryProtocol.interceptInvoker(RegistryProtocol.java:535) at org.apache.dubbo.registry.integration.RegistryProtocol.doRefer(RegistryProtocol.java:505) at org.apache.dubbo.registry.integration.RegistryProtocol.refer(RegistryProtocol.java:487) at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.refer(ProtocolListenerWrapper.java:74) at org.apache.dubbo.qos.protocol.QosProtocolWrapper.refer(QosProtocolWrapper.java:83) at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.refer(ProtocolFilterWrapper.java:71) at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.refer(ProtocolSerializationWrapper.java:52) at org.apache.dubbo.rpc.Protocol$Adaptive.refer(Protocol$Adaptive.java) at org.apache.dubbo.config.ReferenceConfig.createInvokerForRemote(ReferenceConfig.java:494) at org.apache.dubbo.config.ReferenceConfig.createProxy(ReferenceConfig.java:397) at org.apache.dubbo.config.ReferenceConfig.init(ReferenceConfig.java:285) at org.apache.dubbo.config.ReferenceConfig.get(ReferenceConfig.java:219) at org.apache.dubbo.config.utils.SimpleReferenceCache.get(SimpleReferenceCache.java:129) at org.apache.dubbo.config.deploy.DefaultModuleDeployer.lambda$referServices$6(DefaultModuleDeployer.java:387) at java.util.concurrent.ConcurrentHashMap$ValuesView.forEach(ConcurrentHashMap.java:4707) at org.apache.dubbo.config.deploy.DefaultModuleDeployer.referServices(DefaultModuleDeployer.java:367) at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:154) at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:111) at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:100) at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:403) at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:360) at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:897) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.finishRefresh(ServletWebServerApplicationContext.java:162) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:553) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:141) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:747) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1226) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1215) at org.zjvis.datascience.web.DataScienceWebMain.main(DataScienceWebMain.java:54) ``` ### 个人分析 HessianProtocol.doRefer方法中会调用 ``` return (T) hessianProxyFactory.create(serviceType, url.setProtocol("http").toJavaURL(), Thread.currentThread().getContextClassLoader()) ``` **其中url.setProtocol("http").toJavaURL()会报NPE错误 主要是因为，url是InstanceAddressUrl的实例, 其urlAddress变量为空， 而url.setProtocol会引用urlAddress变量** ### 卡很久了，有没有大佬来解决一下这个问题。 -- This is an automated message from the Apache Git Service. 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