springboot发布dubbo服务注册到nacos

喜欢ヅ旅行 2023-09-29 09:28 202阅读 0赞

目录

  • dubbo注册服务到nacos的pom依赖
  • 使用dubbo发布rest服务报错
  • 解决403 unknown user错误
  • 如何把dubbo服务注册到nacos指定的命名空间?
  • dubbo消费端
  • dubbo发布rest服务
    • 启动报错
    • 解决办法
    • 再次报错
    • 解决办法
  • 完善消费者
  • 总结

dubbo注册服务到nacos的pom依赖

理论上只需要2个最核心的依赖

  1. <dependency>
  2.     <groupId>org.apache.dubbo</groupId>
  3.     <artifactId>dubbo-spring-boot-starter</artifactId>
  4.     <version>${dubbo-spring-boot-starter.version}</version>
  5. </dependency>
  6. <dependency>
  7.     <groupId>com.alibaba.cloud</groupId>
  8.     <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
  9. </dependency>

但是dubbo会用到nacos-api，spring-cloud-starter-alibaba-nacos-discovery中依赖的nacos-client版本太低，需要单独指定nacos-client版本，否则在org.apache.dubbo:dubbo中使用nacos-api时会抛NoSuchMethodError，所以在pom中还需要添加

  1. <dependency>
  2.     <groupId>com.alibaba.nacos</groupId>
  3.     <artifactId>nacos-client</artifactId>
  4.     <version>${nacos-client.version}</version>
  5. </dependency>
  7. 2022-04-05 19:09:39.667  WARN 15740 --- [           main] o.a.d.c.deploy.FrameworkModelCleaner     :  [DUBBO] ExtensionDirector is destroyed, dubbo version: 3.0.6, current host: 192.168.1.4
  9. java.lang.IllegalStateException: ExtensionDirector is destroyed
  10.     at org.apache.dubbo.common.extension.ExtensionDirector.checkDestroyed(ExtensionDirector.java:156) ~[dubbo-3.0.6.jar:3.0.6]
  11.     at org.apache.dubbo.common.extension.ExtensionDirector.getExtensionLoader(ExtensionDirector.java:67) ~[dubbo-3.0.6.jar:3.0.6]
  12.     at org.apache.dubbo.common.extension.ExtensionAccessor.getExtensionLoader(ExtensionAccessor.java:27) ~[dubbo-3.0.6.jar:3.0.6]
  13.     at org.apache.dubbo.rpc.model.ScopeModelUtil.getExtensionLoader(ScopeModelUtil.java:102) ~[dubbo-3.0.6.jar:3.0.6]
  14.     at org.apache.dubbo.registry.integration.RegistryProtocol.getRegistry(RegistryProtocol.java:391) ~[dubbo-3.0.6.jar:3.0.6]
  15.     at org.apache.dubbo.registry.integration.RegistryProtocol$ExporterChangeableWrapper.unexport(RegistryProtocol.java:892) ~[dubbo-3.0.6.jar:3.0.6]
  16.     at org.apache.dubbo.registry.integration.RegistryProtocol.destroy(RegistryProtocol.java:636) ~[dubbo-3.0.6.jar:3.0.6]
  17.     at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.destroy(ProtocolListenerWrapper.java:89) ~[dubbo-3.0.6.jar:3.0.6]
  18.     at org.apache.dubbo.qos.protocol.QosProtocolWrapper.destroy(QosProtocolWrapper.java:90) ~[dubbo-3.0.6.jar:3.0.6]
  19.     at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.destroy(ProtocolFilterWrapper.java:79) ~[dubbo-3.0.6.jar:3.0.6]
  20.     at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.destroy(ProtocolSerializationWrapper.java:57) ~[dubbo-3.0.6.jar:3.0.6]
  21.     at org.apache.dubbo.config.deploy.FrameworkModelCleaner.destroyProtocols(FrameworkModelCleaner.java:55) ~[dubbo-3.0.6.jar:3.0.6]
  22.     at org.apache.dubbo.config.deploy.FrameworkModelCleaner.destroyFrameworkResources(FrameworkModelCleaner.java:43) ~[dubbo-3.0.6.jar:3.0.6]
  23.     at org.apache.dubbo.config.deploy.FrameworkModelCleaner.onDestroy(FrameworkModelCleaner.java:35) ~[dubbo-3.0.6.jar:3.0.6]
  24.     at org.apache.dubbo.config.deploy.FrameworkModelCleaner.onDestroy(FrameworkModelCleaner.java:29) ~[dubbo-3.0.6.jar:3.0.6]
  25.     at org.apache.dubbo.rpc.model.ScopeModel.notifyDestroy(ScopeModel.java:133) ~[dubbo-3.0.6.jar:3.0.6]
  26.     at org.apache.dubbo.rpc.model.FrameworkModel.onDestroy(FrameworkModel.java:125) ~[dubbo-3.0.6.jar:3.0.6]
  27.     at org.apache.dubbo.rpc.model.ScopeModel.destroy(ScopeModel.java:110) ~[dubbo-3.0.6.jar:3.0.6]
  28.     at org.apache.dubbo.rpc.model.FrameworkModel.tryDestroy(FrameworkModel.java:257) ~[dubbo-3.0.6.jar:3.0.6]
  29.     at org.apache.dubbo.rpc.model.ApplicationModel.onDestroy(ApplicationModel.java:277) ~[dubbo-3.0.6.jar:3.0.6]
  30.     at org.apache.dubbo.rpc.model.ScopeModel.destroy(ScopeModel.java:110) ~[dubbo-3.0.6.jar:3.0.6]
  31.     at org.apache.dubbo.rpc.model.ApplicationModel.tryDestroy(ApplicationModel.java:351) ~[dubbo-3.0.6.jar:3.0.6]
  32.     at org.apache.dubbo.rpc.model.ModuleModel.onDestroy(ModuleModel.java:124) ~[dubbo-3.0.6.jar:3.0.6]
  33.     at org.apache.dubbo.rpc.model.ScopeModel.destroy(ScopeModel.java:110) ~[dubbo-3.0.6.jar:3.0.6]
  34.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextClosedEvent(DubboDeployApplicationListener.java:130) ~[dubbo-3.0.6.jar:3.0.6]
  35.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:102) ~[dubbo-3.0.6.jar:3.0.6]
  36.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45) ~[dubbo-3.0.6.jar:3.0.6]
  37.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  38.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  39.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  40.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  41.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  42.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1058) ~[spring-context-5.3.18.jar:5.3.18]
  43.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.doClose(ServletWebServerApplicationContext.java:172) ~[spring-boot-2.6.6.jar:2.6.6]
  44.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1021) ~[spring-context-5.3.18.jar:5.3.18]
  45.     at org.springframework.boot.builder.ParentContextCloserApplicationListener$ContextCloserListener.onApplicationEvent(ParentContextCloserApplicationListener.java:94) ~[spring-boot-2.6.6.jar:2.6.6]
  46.     at org.springframework.boot.builder.ParentContextCloserApplicationListener$ContextCloserListener.onApplicationEvent(ParentContextCloserApplicationListener.java:82) ~[spring-boot-2.6.6.jar:2.6.6]
  47.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  48.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  49.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  50.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  51.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  52.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1058) ~[spring-context-5.3.18.jar:5.3.18]
  53.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1021) ~[spring-context-5.3.18.jar:5.3.18]
  54.     at org.springframework.cloud.bootstrap.BootstrapApplicationListener$CloseContextOnFailureApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:497) ~[spring-cloud-context-3.1.1.jar:3.1.1]
  55.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  56.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  57.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  58.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  59.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  60.     at org.springframework.boot.context.event.EventPublishingRunListener.failed(EventPublishingRunListener.java:124) ~[spring-boot-2.6.6.jar:2.6.6]
  61.     at org.springframework.boot.SpringApplicationRunListeners.callFailedListener(SpringApplicationRunListeners.java:96) ~[spring-boot-2.6.6.jar:2.6.6]
  62.     at org.springframework.boot.SpringApplicationRunListeners.lambda$failed$7(SpringApplicationRunListeners.java:87) ~[spring-boot-2.6.6.jar:2.6.6]
  63.     at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
  64.     at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) ~[spring-boot-2.6.6.jar:2.6.6]
  65.     at org.springframework.boot.SpringApplicationRunListeners.failed(SpringApplicationRunListeners.java:86) ~[spring-boot-2.6.6.jar:2.6.6]
  66.     at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:790) ~[spring-boot-2.6.6.jar:2.6.6]
  67.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) ~[spring-boot-2.6.6.jar:2.6.6]
  68.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
  69.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
  70.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15) ~[classes/:na]

使用dubbo发布rest服务报错

  1. 2022-04-05 19:09:48.830 ERROR 15740 --- [           main] o.s.boot.SpringApplication               : Application run failed
  3. java.lang.IllegalStateException: No such extension org.apache.dubbo.rpc.Protocol by name rest, possible causes: 
  4. (1) rest=org.apache.dubbo.rpc.protocol.rest.RestProtocol:
  5. java.lang.IllegalStateException: Failed to load extension class (interface: interface org.apache.dubbo.rpc.Protocol, class line: rest=org.apache.dubbo.rpc.protocol.rest.RestProtocol) in jar:file:/G:/repository/org/apache/dubbo/dubbo/3.0.6/dubbo-3.0.6.jar!/META-INF/dubbo/internal/org.apache.dubbo.rpc.Protocol, cause: org/jboss/resteasy/client/jaxrs/ClientHttpEngine
  6. java.lang.IllegalStateException: Failed to load extension class (interface: interface org.apache.dubbo.rpc.Protocol, class line: rest=org.apache.dubbo.rpc.protocol.rest.RestProtocol) in jar:file:/G:/repository/org/apache/dubbo/dubbo/3.0.6/dubbo-3.0.6.jar!/META-INF/dubbo/internal/org.apache.dubbo.rpc.Protocol, cause: org/jboss/resteasy/client/jaxrs/ClientHttpEngine
  7.     at org.apache.dubbo.common.extension.ExtensionLoader.loadResource(ExtensionLoader.java:1052)
  8.     at org.apache.dubbo.common.extension.ExtensionLoader.loadFromClass(ExtensionLoader.java:1019)
  9.     at org.apache.dubbo.common.extension.ExtensionLoader.lambda$loadDirectory$4(ExtensionLoader.java:1007)
  10.     at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
  11.     at java.base/java.util.Collections$UnmodifiableMap.forEach(Collections.java:1553)
  12.     at org.apache.dubbo.common.extension.ExtensionLoader.loadDirectory(ExtensionLoader.java:1006)
  13.     at org.apache.dubbo.common.extension.ExtensionLoader.loadDirectory(ExtensionLoader.java:943)
  14.     at org.apache.dubbo.common.extension.ExtensionLoader.loadExtensionClasses(ExtensionLoader.java:931)
  15.     at org.apache.dubbo.common.extension.ExtensionLoader.getExtensionClasses(ExtensionLoader.java:913)
  16.     at org.apache.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:1243)
  17.     at org.apache.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:1231)
  18.     at org.apache.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:713)
  19.     at org.apache.dubbo.config.ServiceConfig.postProcessAfterScopeModelChanged(ServiceConfig.java:154)
  20.     at org.apache.dubbo.config.AbstractConfig.setScopeModel(AbstractConfig.java:395)
  21.     at org.apache.dubbo.config.AbstractConfig.<init>(AbstractConfig.java:117)
  22.     at org.apache.dubbo.config.AbstractMethodConfig.<init>(AbstractMethodConfig.java:103)
  23.     at org.apache.dubbo.config.AbstractInterfaceConfig.<init>(AbstractInterfaceConfig.java:192)
  24.     at org.apache.dubbo.config.AbstractServiceConfig.<init>(AbstractServiceConfig.java:132)
  25.     at org.apache.dubbo.config.ServiceConfigBase.<init>(ServiceConfigBase.java:84)
  26.     at org.apache.dubbo.config.ServiceConfig.<init>(ServiceConfig.java:136)
  27.     at org.apache.dubbo.config.spring.ServiceBean.<init>(ServiceBean.java:56)
  28.     at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  29.     at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
  30.     at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  31.     at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
  32.     at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
  33.     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211)
  34.     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
  35.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1326)
  36.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1232)
  37.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
  38.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
  39.     at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
  40.     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
  41.     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
  42.     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
  43.     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953)
  44.     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
  45.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
  46.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
  47.     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
  48.     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
  49.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
  50.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
  51.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
  52.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15)
  53. Caused by: java.lang.NoClassDefFoundError: org/jboss/resteasy/client/jaxrs/ClientHttpEngine
  54.     at java.base/java.lang.Class.forName0(Native Method)
  55.     at java.base/java.lang.Class.forName(Class.java:467)
  56.     at org.apache.dubbo.common.extension.ExtensionLoader.loadResource(ExtensionLoader.java:1048)
  57.     ... 45 more
  58. Caused by: java.lang.ClassNotFoundException: org.jboss.resteasy.client.jaxrs.ClientHttpEngine
  59.     at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
  60.     at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
  61.     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
  62.     ... 48 more
  64.     at org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:747) ~[dubbo-3.0.6.jar:3.0.6]
  65.     at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:754) ~[dubbo-3.0.6.jar:3.0.6]
  66.     at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:548) ~[dubbo-3.0.6.jar:3.0.6]
  67.     at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:523) ~[dubbo-3.0.6.jar:3.0.6]
  68.     at org.apache.dubbo.config.ServiceConfig.findConfiguredPort(ServiceConfig.java:760) ~[dubbo-3.0.6.jar:3.0.6]
  69.     at org.apache.dubbo.config.ServiceConfig.buildUrl(ServiceConfig.java:543) ~[dubbo-3.0.6.jar:3.0.6]
  70.     at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:398) ~[dubbo-3.0.6.jar:3.0.6]
  71.     at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:386) ~[dubbo-3.0.6.jar:3.0.6]
  72.     at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:361) ~[dubbo-3.0.6.jar:3.0.6]
  73.     at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:233) ~[dubbo-3.0.6.jar:3.0.6]
  74.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.exportServiceInternal(DefaultModuleDeployer.java:338) ~[dubbo-3.0.6.jar:3.0.6]
  75.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.exportServices(DefaultModuleDeployer.java:310) ~[dubbo-3.0.6.jar:3.0.6]
  76.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:142) ~[dubbo-3.0.6.jar:3.0.6]
  77.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:111) ~[dubbo-3.0.6.jar:3.0.6]
  78.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:100) ~[dubbo-3.0.6.jar:3.0.6]
  79.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45) ~[dubbo-3.0.6.jar:3.0.6]
  80.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  81.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  82.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  83.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  84.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  85.     at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:938) ~[spring-context-5.3.18.jar:5.3.18]
  86.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.18.jar:5.3.18]
  87.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.6.jar:2.6.6]
  88.     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.6.jar:2.6.6]
  89.     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.6.jar:2.6.6]
  90.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.6.jar:2.6.6]
  91.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
  92.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
  93.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15) ~[classes/:na]

解决403 unknown user错误

把dubbo服务注册到nacos，如果nacos开启了权限认证，那么springboot应用的配置文件在写dubbo配置项时，需要指定用户名和密码，如果这样指定是无效的

  1. dubbo:
  2.   registry:
  3.     address: nacos://localhost:8848
  4.     username: nacos
  5.     password: nacos

这样在启动时，dubbo向nacos注册服务会报403 unknown user的错误。

  1. 2022-04-05 19:09:28.389  WARN 15740 --- [           main] o.a.dubbo.registry.nacos.NacosRegistry   :  [DUBBO] Failed to unregister url dubbo://192.168.1.4:20880/org.apache.dubbo.metadata.MetadataService?anyhost=true&application=provider1&background=false&connections=1&delay=0&deprecated=false&dubbo=2.0.2&dynamic=true&executes=100&generic=false&group=provider1&interface=org.apache.dubbo.metadata.MetadataService&metadata-type=remote&methods=getMetadataURL,isMetadataService,getExportedURLs,serviceName,version,getSubscribedURLs,getExportedServiceURLs,getMetadataInfo,toSortedStrings,getMetadataInfos,getServiceDefinition&pid=15740&release=3.0.6&revision=3.0.6&service-name-mapping=true&side=provider&timestamp=1649156966499&version=1.0.0 to registry nacos://localhost:8848/org.apache.dubbo.registry.RegistryService?application=provider1&dubbo=2.0.2&group=demo-provider&interface=org.apache.dubbo.registry.RegistryService&pid=15740&qos.enable=false&release=3.0.6&server=localhost on destroy, cause: Failed to unregister dubbo://192.168.1.4:20880/org.apache.dubbo.metadata.MetadataService?anyhost=true&application=provider1&background=false&connections=1&delay=0&deprecated=false&dubbo=2.0.2&dynamic=true&executes=100&generic=false&group=provider1&interface=org.apache.dubbo.metadata.MetadataService&metadata-type=remote&methods=getMetadataURL,isMetadataService,getExportedURLs,serviceName,version,getSubscribedURLs,getExportedServiceURLs,getMetadataInfo,toSortedStrings,getMetadataInfos,getServiceDefinition&pid=15740&release=3.0.6&revision=3.0.6&service-name-mapping=true&side=provider&timestamp=1649156966499&version=1.0.0 to registry localhost:8848, cause: Failed to unregister dubbo://192.168.1.4:20880/org.apache.dubbo.metadata.MetadataService?anyhost=true&application=provider1&background=false&connections=1&delay=0&deprecated=false&dubbo=2.0.2&dynamic=true&executes=100&generic=false&group=provider1&interface=org.apache.dubbo.metadata.MetadataService&metadata-type=remote&methods=getMetadataURL,isMetadataService,getExportedURLs,serviceName,version,getSubscribedURLs,getExportedServiceURLs,getMetadataInfo,toSortedStrings,getMetadataInfos,getServiceDefinition&pid=15740&release=3.0.6&revision=3.0.6&service-name-mapping=true&side=provider&timestamp=1649156966499&version=1.0.0 to nacos nacos://localhost:8848/org.apache.dubbo.registry.RegistryService?application=provider1&dubbo=2.0.2&group=demo-provider&interface=org.apache.dubbo.registry.RegistryService&pid=15740&qos.enable=false&release=3.0.6&server=localhost, cause: failed to req API:/nacos/v1/ns/instance after all servers([localhost:8848]) tried: ErrCode:403, ErrMsg:<html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p><div id='created'>Tue Apr 05 19:09:28 CST 2022</div><div>There was an unexpected error (type=Forbidden, status=403).</div><div>unknown user!</div></body></html>, dubbo version: 3.0.6, current host: 192.168.1.4
  3. java.lang.IllegalStateException: Failed to unregister dubbo://192.168.1.4:20880/org.apache.dubbo.metadata.MetadataService?anyhost=true&application=provider1&background=false&connections=1&delay=0&deprecated=false&dubbo=2.0.2&dynamic=true&executes=100&generic=false&group=provider1&interface=org.apache.dubbo.metadata.MetadataService&metadata-type=remote&methods=getMetadataURL,isMetadataService,getExportedURLs,serviceName,version,getSubscribedURLs,getExportedServiceURLs,getMetadataInfo,toSortedStrings,getMetadataInfos,getServiceDefinition&pid=15740&release=3.0.6&revision=3.0.6&service-name-mapping=true&side=provider&timestamp=1649156966499&version=1.0.0 to registry localhost:8848, cause: Failed to unregister dubbo://192.168.1.4:20880/org.apache.dubbo.metadata.MetadataService?anyhost=true&application=provider1&background=false&connections=1&delay=0&deprecated=false&dubbo=2.0.2&dynamic=true&executes=100&generic=false&group=provider1&interface=org.apache.dubbo.metadata.MetadataService&metadata-type=remote&methods=getMetadataURL,isMetadataService,getExportedURLs,serviceName,version,getSubscribedURLs,getExportedServiceURLs,getMetadataInfo,toSortedStrings,getMetadataInfos,getServiceDefinition&pid=15740&release=3.0.6&revision=3.0.6&service-name-mapping=true&side=provider&timestamp=1649156966499&version=1.0.0 to nacos nacos://localhost:8848/org.apache.dubbo.registry.RegistryService?application=provider1&dubbo=2.0.2&group=demo-provider&interface=org.apache.dubbo.registry.RegistryService&pid=15740&qos.enable=false&release=3.0.6&server=localhost, cause: failed to req API:/nacos/v1/ns/instance after all servers([localhost:8848]) tried: ErrCode:403, ErrMsg:<html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p><div id='created'>Tue Apr 05 19:09:28 CST 2022</div><div>There was an unexpected error (type=Forbidden, status=403).</div><div>unknown user!</div></body></html>
  4.     at org.apache.dubbo.registry.support.FailbackRegistry.unregister(FailbackRegistry.java:266) ~[dubbo-3.0.6.jar:3.0.6]
  5.     at org.apache.dubbo.registry.support.AbstractRegistry.destroy(AbstractRegistry.java:496) ~[dubbo-3.0.6.jar:3.0.6]
  6.     at org.apache.dubbo.registry.support.FailbackRegistry.destroy(FailbackRegistry.java:407) ~[dubbo-3.0.6.jar:3.0.6]
  7.     at org.apache.dubbo.registry.support.RegistryManager.destroyAll(RegistryManager.java:105) ~[dubbo-3.0.6.jar:3.0.6]
  8.     at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.destroyRegistries(DefaultApplicationDeployer.java:1009) ~[dubbo-3.0.6.jar:3.0.6]
  9.     at org.apache.dubbo.config.deploy.DefaultApplicationDeployer.postDestroy(DefaultApplicationDeployer.java:775) ~[dubbo-3.0.6.jar:3.0.6]
  10.     at org.apache.dubbo.rpc.model.ApplicationModel.onDestroy(ApplicationModel.java:257) ~[dubbo-3.0.6.jar:3.0.6]
  11.     at org.apache.dubbo.rpc.model.ScopeModel.destroy(ScopeModel.java:110) ~[dubbo-3.0.6.jar:3.0.6]
  12.     at org.apache.dubbo.rpc.model.ApplicationModel.tryDestroy(ApplicationModel.java:351) ~[dubbo-3.0.6.jar:3.0.6]
  13.     at org.apache.dubbo.rpc.model.ModuleModel.onDestroy(ModuleModel.java:124) ~[dubbo-3.0.6.jar:3.0.6]
  14.     at org.apache.dubbo.rpc.model.ScopeModel.destroy(ScopeModel.java:110) ~[dubbo-3.0.6.jar:3.0.6]
  15.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextClosedEvent(DubboDeployApplicationListener.java:130) ~[dubbo-3.0.6.jar:3.0.6]
  16.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:102) ~[dubbo-3.0.6.jar:3.0.6]
  17.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45) ~[dubbo-3.0.6.jar:3.0.6]
  18.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  19.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  20.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  21.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  22.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  23.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1058) ~[spring-context-5.3.18.jar:5.3.18]
  24.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.doClose(ServletWebServerApplicationContext.java:172) ~[spring-boot-2.6.6.jar:2.6.6]
  25.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1021) ~[spring-context-5.3.18.jar:5.3.18]
  26.     at org.springframework.boot.builder.ParentContextCloserApplicationListener$ContextCloserListener.onApplicationEvent(ParentContextCloserApplicationListener.java:94) ~[spring-boot-2.6.6.jar:2.6.6]
  27.     at org.springframework.boot.builder.ParentContextCloserApplicationListener$ContextCloserListener.onApplicationEvent(ParentContextCloserApplicationListener.java:82) ~[spring-boot-2.6.6.jar:2.6.6]
  28.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  29.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  30.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  31.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  32.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  33.     at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:1058) ~[spring-context-5.3.18.jar:5.3.18]
  34.     at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:1021) ~[spring-context-5.3.18.jar:5.3.18]
  35.     at org.springframework.cloud.bootstrap.BootstrapApplicationListener$CloseContextOnFailureApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:497) ~[spring-cloud-context-3.1.1.jar:3.1.1]
  36.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  37.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  38.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  39.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  40.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  41.     at org.springframework.boot.context.event.EventPublishingRunListener.failed(EventPublishingRunListener.java:124) ~[spring-boot-2.6.6.jar:2.6.6]
  42.     at org.springframework.boot.SpringApplicationRunListeners.callFailedListener(SpringApplicationRunListeners.java:96) ~[spring-boot-2.6.6.jar:2.6.6]
  43.     at org.springframework.boot.SpringApplicationRunListeners.lambda$failed$7(SpringApplicationRunListeners.java:87) ~[spring-boot-2.6.6.jar:2.6.6]
  44.     at java.base/java.util.ArrayList.forEach(ArrayList.java:1511) ~[na:na]
  45.     at org.springframework.boot.SpringApplicationRunListeners.doWithListeners(SpringApplicationRunListeners.java:120) ~[spring-boot-2.6.6.jar:2.6.6]
  46.     at org.springframework.boot.SpringApplicationRunListeners.failed(SpringApplicationRunListeners.java:86) ~[spring-boot-2.6.6.jar:2.6.6]
  47.     at org.springframework.boot.SpringApplication.handleRunFailure(SpringApplication.java:790) ~[spring-boot-2.6.6.jar:2.6.6]
  48.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:313) ~[spring-boot-2.6.6.jar:2.6.6]
  49.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
  50.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
  51.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15) ~[classes/:na]
  52. Caused by: org.apache.dubbo.rpc.RpcException: Failed to unregister dubbo://192.168.1.4:20880/org.apache.dubbo.metadata.MetadataService?anyhost=true&application=provider1&background=false&connections=1&delay=0&deprecated=false&dubbo=2.0.2&dynamic=true&executes=100&generic=false&group=provider1&interface=org.apache.dubbo.metadata.MetadataService&metadata-type=remote&methods=getMetadataURL,isMetadataService,getExportedURLs,serviceName,version,getSubscribedURLs,getExportedServiceURLs,getMetadataInfo,toSortedStrings,getMetadataInfos,getServiceDefinition&pid=15740&release=3.0.6&revision=3.0.6&service-name-mapping=true&side=provider&timestamp=1649156966499&version=1.0.0 to nacos nacos://localhost:8848/org.apache.dubbo.registry.RegistryService?application=provider1&dubbo=2.0.2&group=demo-provider&interface=org.apache.dubbo.registry.RegistryService&pid=15740&qos.enable=false&release=3.0.6&server=localhost, cause: failed to req API:/nacos/v1/ns/instance after all servers([localhost:8848]) tried: ErrCode:403, ErrMsg:<html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p><div id='created'>Tue Apr 05 19:09:28 CST 2022</div><div>There was an unexpected error (type=Forbidden, status=403).</div><div>unknown user!</div></body></html>
  53.     at org.apache.dubbo.registry.nacos.NacosRegistry.doUnregister(NacosRegistry.java:194) ~[dubbo-3.0.6.jar:3.0.6]
  54.     at org.apache.dubbo.registry.support.FailbackRegistry.unregister(FailbackRegistry.java:253) ~[dubbo-3.0.6.jar:3.0.6]
  55.     ... 47 common frames omitted
  56. Caused by: com.alibaba.nacos.api.exception.NacosException: failed to req API:/nacos/v1/ns/instance after all servers([localhost:8848]) tried: ErrCode:403, ErrMsg:<html><body><h1>Whitelabel Error Page</h1><p>This application has no explicit mapping for /error, so you are seeing this as a fallback.</p><div id='created'>Tue Apr 05 19:09:28 CST 2022</div><div>There was an unexpected error (type=Forbidden, status=403).</div><div>unknown user!</div></body></html>
  57.     at com.alibaba.nacos.client.naming.net.NamingProxy.reqApi(NamingProxy.java:556) ~[nacos-client-1.4.2.jar:na]
  58.     at com.alibaba.nacos.client.naming.net.NamingProxy.reqApi(NamingProxy.java:498) ~[nacos-client-1.4.2.jar:na]
  59.     at com.alibaba.nacos.client.naming.net.NamingProxy.reqApi(NamingProxy.java:493) ~[nacos-client-1.4.2.jar:na]
  60.     at com.alibaba.nacos.client.naming.net.NamingProxy.deregisterService(NamingProxy.java:271) ~[nacos-client-1.4.2.jar:na]
  61.     at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:252) ~[nacos-client-1.4.2.jar:na]
  62.     at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:238) ~[nacos-client-1.4.2.jar:na]
  63.     at com.alibaba.nacos.client.naming.NacosNamingService.deregisterInstance(NacosNamingService.java:222) ~[nacos-client-1.4.2.jar:na]
  64.     at org.apache.dubbo.registry.nacos.NacosNamingServiceWrapper.deregisterInstance(NacosNamingServiceWrapper.java:63) ~[dubbo-3.0.6.jar:3.0.6]
  65.     at org.apache.dubbo.registry.nacos.NacosRegistry.doUnregister(NacosRegistry.java:189) ~[dubbo-3.0.6.jar:3.0.6]
  66.     ... 48 common frames omitted

翻看了nacos源码发现

  1. public void setAddress(String address) {
  2.         this.address = address;
  3.         if (address != null) {
  4.             try {
  5.                 URL url = URL.valueOf(address);
  7.                 // Refactor since 2.7.8
  8.                 updatePropertyIfAbsent(this::getUsername, this::setUsername, url.getUsername());
  9.                 updatePropertyIfAbsent(this::getPassword, this::setPassword, url.getPassword());
  10.                 updatePropertyIfAbsent(this::getProtocol, this::setProtocol, url.getProtocol());
  11.                 updatePropertyIfAbsent(this::getPort, this::setPort, url.getPort());
  13.                 Map<String, String> params = url.getParameters();
  14.                 if (CollectionUtils.isNotEmptyMap(params)) {
  15.                     params.remove(BACKUP_KEY);
  16.                 }
  17.                 updateParameters(params);
  18.             } catch (Exception ignored) {
  19.             }
  20.         }
  21.     }

在处理address时，会处理username和password，因此需要这样配置

  1. dubbo:
  2.   registry:
  3.     address: nacos://localhost:8848?username=nacos&password=nacos

如何把dubbo服务注册到nacos指定的命名空间?

翻看DubboConfigurationProperties这个类的源码，以及对象成员属性的所有字段，均没有找到任何关于namespace的配置项，但在registry对象里面有一个parameters配置，看起来有点像，试着在这个配置里面追加一个namespace，果然成了，正确配置如下

  1. dubbo:
  2.   registry:
  3.     address: nacos://localhost:8848?username=nacos&password=nacos
  4.     parameters:
  5.       namespace: demo-dubbo-nacos

dubbo消费端

消费端关键的一个注解就是**@DubboReference**，在使用这个注解的时候需要指定版本号和group，例如

  1. @DubboReference(version = "demo-1.0.0", group = "demo-provider")

完整代码如下

  1. @RestController
  2. public class DemoHelloConsumerController {
  5.     @DubboReference(version = "demo-1.0.0", group = "demo-provider")
  6.     private DemoService demoService;
  8.     @GetMapping(path = "/hello-dubbo")
  9.     public String helloDubbo(String name) {
  11.         return demoService.helloWorld(name);
  12.     }
  13. }

dubbo发布rest服务

只需要修改服务提供者**@DubboService注解的protocol**属性
@DubboService(protocol = "dubbo,rest")

启动报错

  1. 2022-04-09 09:07:39.058 ERROR 10896 --- [           main] o.s.boot.SpringApplication               : Application run failed
  3. java.lang.IllegalStateException: No such extension org.apache.dubbo.rpc.Protocol by name rest, possible causes: 
  4. (1) rest=org.apache.dubbo.rpc.protocol.rest.RestProtocol:
  5. java.lang.IllegalStateException: Failed to load extension class (interface: interface org.apache.dubbo.rpc.Protocol, class line: rest=org.apache.dubbo.rpc.protocol.rest.RestProtocol) in jar:file:/G:/repository/org/apache/dubbo/dubbo/3.0.7/dubbo-3.0.7.jar!/META-INF/dubbo/internal/org.apache.dubbo.rpc.Protocol, cause: org/jboss/resteasy/client/jaxrs/ClientHttpEngine
  6. java.lang.IllegalStateException: Failed to load extension class (interface: interface org.apache.dubbo.rpc.Protocol, class line: rest=org.apache.dubbo.rpc.protocol.rest.RestProtocol) in jar:file:/G:/repository/org/apache/dubbo/dubbo/3.0.7/dubbo-3.0.7.jar!/META-INF/dubbo/internal/org.apache.dubbo.rpc.Protocol, cause: org/jboss/resteasy/client/jaxrs/ClientHttpEngine
  7.     at org.apache.dubbo.common.extension.ExtensionLoader.loadResource(ExtensionLoader.java:1052)
  8.     at org.apache.dubbo.common.extension.ExtensionLoader.loadFromClass(ExtensionLoader.java:1019)
  9.     at org.apache.dubbo.common.extension.ExtensionLoader.lambda$loadDirectory$4(ExtensionLoader.java:1007)
  10.     at java.base/java.util.LinkedHashMap.forEach(LinkedHashMap.java:721)
  11.     at java.base/java.util.Collections$UnmodifiableMap.forEach(Collections.java:1553)
  12.     at org.apache.dubbo.common.extension.ExtensionLoader.loadDirectory(ExtensionLoader.java:1006)
  13.     at org.apache.dubbo.common.extension.ExtensionLoader.loadDirectory(ExtensionLoader.java:943)
  14.     at org.apache.dubbo.common.extension.ExtensionLoader.loadExtensionClasses(ExtensionLoader.java:931)
  15.     at org.apache.dubbo.common.extension.ExtensionLoader.getExtensionClasses(ExtensionLoader.java:913)
  16.     at org.apache.dubbo.common.extension.ExtensionLoader.getAdaptiveExtensionClass(ExtensionLoader.java:1243)
  17.     at org.apache.dubbo.common.extension.ExtensionLoader.createAdaptiveExtension(ExtensionLoader.java:1231)
  18.     at org.apache.dubbo.common.extension.ExtensionLoader.getAdaptiveExtension(ExtensionLoader.java:713)
  19.     at org.apache.dubbo.config.ServiceConfig.postProcessAfterScopeModelChanged(ServiceConfig.java:154)
  20.     at org.apache.dubbo.config.AbstractConfig.setScopeModel(AbstractConfig.java:395)
  21.     at org.apache.dubbo.config.AbstractConfig.<init>(AbstractConfig.java:117)
  22.     at org.apache.dubbo.config.AbstractMethodConfig.<init>(AbstractMethodConfig.java:103)
  23.     at org.apache.dubbo.config.AbstractInterfaceConfig.<init>(AbstractInterfaceConfig.java:192)
  24.     at org.apache.dubbo.config.AbstractServiceConfig.<init>(AbstractServiceConfig.java:132)
  25.     at org.apache.dubbo.config.ServiceConfigBase.<init>(ServiceConfigBase.java:84)
  26.     at org.apache.dubbo.config.ServiceConfig.<init>(ServiceConfig.java:136)
  27.     at org.apache.dubbo.config.spring.ServiceBean.<init>(ServiceBean.java:56)
  28.     at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
  29.     at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
  30.     at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
  31.     at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499)
  32.     at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:480)
  33.     at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:211)
  34.     at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87)
  35.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1326)
  36.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1232)
  37.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582)
  38.     at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542)
  39.     at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335)
  40.     at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234)
  41.     at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333)
  42.     at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208)
  43.     at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953)
  44.     at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918)
  45.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583)
  46.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
  47.     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
  48.     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
  49.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
  50.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
  51.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
  52.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15)
  53. Caused by: java.lang.NoClassDefFoundError: org/jboss/resteasy/client/jaxrs/ClientHttpEngine
  54.     at java.base/java.lang.Class.forName0(Native Method)
  55.     at java.base/java.lang.Class.forName(Class.java:467)
  56.     at org.apache.dubbo.common.extension.ExtensionLoader.loadResource(ExtensionLoader.java:1048)
  57.     ... 45 more
  58. Caused by: java.lang.ClassNotFoundException: org.jboss.resteasy.client.jaxrs.ClientHttpEngine
  59.     at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
  60.     at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
  61.     at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520)
  62.     ... 48 more
  64.     at org.apache.dubbo.common.extension.ExtensionLoader.findException(ExtensionLoader.java:747) ~[dubbo-3.0.7.jar:3.0.7]
  65.     at org.apache.dubbo.common.extension.ExtensionLoader.createExtension(ExtensionLoader.java:754) ~[dubbo-3.0.7.jar:3.0.7]
  66.     at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:548) ~[dubbo-3.0.7.jar:3.0.7]
  67.     at org.apache.dubbo.common.extension.ExtensionLoader.getExtension(ExtensionLoader.java:523) ~[dubbo-3.0.7.jar:3.0.7]
  68.     at org.apache.dubbo.config.ServiceConfig.findConfiguredPort(ServiceConfig.java:769) ~[dubbo-3.0.7.jar:3.0.7]
  69.     at org.apache.dubbo.config.ServiceConfig.buildUrl(ServiceConfig.java:552) ~[dubbo-3.0.7.jar:3.0.7]
  70.     at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:408) ~[dubbo-3.0.7.jar:3.0.7]
  71.     at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:396) ~[dubbo-3.0.7.jar:3.0.7]
  72.     at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:361) ~[dubbo-3.0.7.jar:3.0.7]
  73.     at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:233) ~[dubbo-3.0.7.jar:3.0.7]
  74.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.exportServiceInternal(DefaultModuleDeployer.java:341) ~[dubbo-3.0.7.jar:3.0.7]
  75.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.exportServices(DefaultModuleDeployer.java:313) ~[dubbo-3.0.7.jar:3.0.7]
  76.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:145) ~[dubbo-3.0.7.jar:3.0.7]
  77.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:111) ~[dubbo-3.0.7.jar:3.0.7]
  78.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:100) ~[dubbo-3.0.7.jar:3.0.7]
  79.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45) ~[dubbo-3.0.7.jar:3.0.7]
  80.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  81.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  82.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  83.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  84.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  85.     at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:938) ~[spring-context-5.3.18.jar:5.3.18]
  86.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.18.jar:5.3.18]
  87.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.6.jar:2.6.6]
  88.     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.6.jar:2.6.6]
  89.     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.6.jar:2.6.6]
  90.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.6.jar:2.6.6]
  91.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
  92.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
  93.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15) ~[classes/:na]

解决办法

添加依赖

  1. <dependency>
  2.             <groupId>org.apache.dubbo</groupId>
  3.             <artifactId>dubbo-rpc-rest</artifactId>
  4.             <version>${dubbo.version}</version>
  5.         </dependency>

重启启动就不会提示找不到org.jboss.resteasy.client.jaxrs.ClientHttpEngine这个类了

再次报错

  1. 2022-04-09 09:29:09.393 ERROR 13308 --- [           main] o.s.boot.SpringApplication               : Application run failed
  3. java.lang.RuntimeException: RESTEASY003130: Class is not a root resource.  It, or one of its interfaces must be annotated with @Path: com.wen3.dubbonacos.service.DemoService implements: 
  4.     at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:185) ~[resteasy-jaxrs-3.14.0.Final.jar:3.14.0.Final]
  5.     at org.jboss.resteasy.core.ResourceMethodRegistry.addResourceFactory(ResourceMethodRegistry.java:164) ~[resteasy-jaxrs-3.14.0.Final.jar:3.14.0.Final]
  6.     at org.apache.dubbo.rpc.protocol.rest.BaseRestProtocolServer.deploy(BaseRestProtocolServer.java:53) ~[dubbo-3.0.7.jar:3.0.7]
  7.     at org.apache.dubbo.rpc.protocol.rest.RestProtocol.doExport(RestProtocol.java:127) ~[dubbo-3.0.7.jar:3.0.7]
  8.     at org.apache.dubbo.rpc.protocol.AbstractProxyProtocol.export(AbstractProxyProtocol.java:89) ~[dubbo-3.0.7.jar:3.0.7]
  9.     at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:66) ~[dubbo-3.0.7.jar:3.0.7]
  10.     at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:76) ~[dubbo-3.0.7.jar:3.0.7]
  11.     at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:61) ~[dubbo-3.0.7.jar:3.0.7]
  12.     at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.export(ProtocolSerializationWrapper.java:47) ~[dubbo-3.0.7.jar:3.0.7]
  13.     at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) ~[dubbo-3.0.7.jar:3.0.7]
  14.     at org.apache.dubbo.registry.integration.RegistryProtocol.lambda$doLocalExport$2(RegistryProtocol.java:294) ~[dubbo-3.0.7.jar:3.0.7]
  15.     at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1708) ~[na:na]
  16.     at org.apache.dubbo.registry.integration.RegistryProtocol.doLocalExport(RegistryProtocol.java:292) ~[dubbo-3.0.7.jar:3.0.7]
  17.     at org.apache.dubbo.registry.integration.RegistryProtocol.export(RegistryProtocol.java:239) ~[dubbo-3.0.7.jar:3.0.7]
  18.     at org.apache.dubbo.rpc.protocol.ProtocolListenerWrapper.export(ProtocolListenerWrapper.java:64) ~[dubbo-3.0.7.jar:3.0.7]
  19.     at org.apache.dubbo.qos.protocol.QosProtocolWrapper.export(QosProtocolWrapper.java:74) ~[dubbo-3.0.7.jar:3.0.7]
  20.     at org.apache.dubbo.rpc.cluster.filter.ProtocolFilterWrapper.export(ProtocolFilterWrapper.java:58) ~[dubbo-3.0.7.jar:3.0.7]
  21.     at org.apache.dubbo.rpc.protocol.ProtocolSerializationWrapper.export(ProtocolSerializationWrapper.java:47) ~[dubbo-3.0.7.jar:3.0.7]
  22.     at org.apache.dubbo.rpc.Protocol$Adaptive.export(Protocol$Adaptive.java) ~[dubbo-3.0.7.jar:3.0.7]
  23.     at org.apache.dubbo.config.ServiceConfig.doExportUrl(ServiceConfig.java:641) ~[dubbo-3.0.7.jar:3.0.7]
  24.     at org.apache.dubbo.config.ServiceConfig.exportRemote(ServiceConfig.java:619) ~[dubbo-3.0.7.jar:3.0.7]
  25.     at org.apache.dubbo.config.ServiceConfig.exportUrl(ServiceConfig.java:578) ~[dubbo-3.0.7.jar:3.0.7]
  26.     at org.apache.dubbo.config.ServiceConfig.doExportUrlsFor1Protocol(ServiceConfig.java:410) ~[dubbo-3.0.7.jar:3.0.7]
  27.     at org.apache.dubbo.config.ServiceConfig.doExportUrls(ServiceConfig.java:396) ~[dubbo-3.0.7.jar:3.0.7]
  28.     at org.apache.dubbo.config.ServiceConfig.doExport(ServiceConfig.java:361) ~[dubbo-3.0.7.jar:3.0.7]
  29.     at org.apache.dubbo.config.ServiceConfig.export(ServiceConfig.java:233) ~[dubbo-3.0.7.jar:3.0.7]
  30.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.exportServiceInternal(DefaultModuleDeployer.java:341) ~[dubbo-3.0.7.jar:3.0.7]
  31.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.exportServices(DefaultModuleDeployer.java:313) ~[dubbo-3.0.7.jar:3.0.7]
  32.     at org.apache.dubbo.config.deploy.DefaultModuleDeployer.start(DefaultModuleDeployer.java:145) ~[dubbo-3.0.7.jar:3.0.7]
  33.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onContextRefreshedEvent(DubboDeployApplicationListener.java:111) ~[dubbo-3.0.7.jar:3.0.7]
  34.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:100) ~[dubbo-3.0.7.jar:3.0.7]
  35.     at org.apache.dubbo.config.spring.context.DubboDeployApplicationListener.onApplicationEvent(DubboDeployApplicationListener.java:45) ~[dubbo-3.0.7.jar:3.0.7]
  36.     at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
  37.     at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
  38.     at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
  39.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
  40.     at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
  41.     at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:938) ~[spring-context-5.3.18.jar:5.3.18]
  42.     at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.18.jar:5.3.18]
  43.     at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.6.jar:2.6.6]
  44.     at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.6.jar:2.6.6]
  45.     at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.6.jar:2.6.6]
  46.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.6.jar:2.6.6]
  47.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
  48.     at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
  49.     at com.wen3.dubbonacos.DemoProviderApplication.main(DemoProviderApplication.java:15) ~[classes/:na]

解决办法

服务实现的接口需要添加javax.ws.rs的注解，在定义接口的工程里面添加如下依赖

  1. <dependency>
  2.             <groupId>javax.ws.rs</groupId>
  3.             <artifactId>javax.ws.rs-api</artifactId>
  4.             <version>${javax.ws.rs-api.version}</version>
  5.         </dependency>

接口上添加相关注解

  1. public interface DemoService {
  4.     @GET
  5.     @Produces
  6.     @Consumes
  7.     @Path("/hello")
  8.     String helloWorld(@QueryParam("name") String name);
  9. }

完善消费者

现在服务提供者向nacos注册了三个服务，为什么是3个？

  • nacos做为注册中心，服务提供者向注册中心了注册了一个服务，可以暴露提供者所有的rest接口
  • 引用的dubbo框架向nacos暴露了一个服务，这个服务同时支持dubbo协议和rest协议，两个协议的端口不同

所以相当于提供了三个接口，那么消费者可以使用Feign组件访问，也可以实现dubbo协议访问，我们把这三种访问方式都演示一下，改造后的消费者代码如下

看下nacos的服务列表
在这里插入图片描述

  1. @RestController
  2. public class DemoHelloConsumerController {
  5.     @Resource
  6.     private DemoProviderFeign demoProviderFeign;
  7.     @DubboReference(version = "demo-1.0.0", group = "demo-provider", protocol = "dubbo")
  8.     private DemoService demoService;
  9.     @DubboReference(version = "demo-1.0.0", group = "demo-provider", protocol = "rest")
  10.     private DemoService demoServiceRest;
  12.     @GetMapping(path = "/hello")
  13.     public String hello(String name) {
  15.         return demoProviderFeign.hello(name);
  16.     }
  18.     @GetMapping(path = "/hello-dubbo")
  19.     public String helloDubbo(String name) {
  21.         return demoService.helloWorld(name);
  22.     }
  24.     @GetMapping(path = "/hello-rest")
  25.     public String helloRest(String name) {
  27.         return demoServiceRest.helloWorld(name);
  28.     }
  29. }

启动消费者进行测试

  1. $ curl "http://localhost:8081/hello?name=xxx1"
  2. xxx1,hello!
  4. $ curl "http://localhost:8081/hello-dubbo?name=xxx2"
  5. hello xxx2!
  7. $ curl "http://localhost:8081/hello-rest?name=xxx3"
  8. hello xxx3!

总结

本文介绍了一个SpringBoot应用，如何向注册中心nacos注册dubbo服务和rest服务，并且在配置和使用过程中遇到的一些常见的问题，也做了分析和解决。

dubbo框架既可以发布dubbo服务，也能发布rest服务，但是对rest服务有要求，那就是必须使用javax.ws.rs下面的注解。

dubbo框架发布的服务更倾向于微服务内部调用，可以提高内部交互的整体性能。Spring Cloud注册中心Eureka可以无缝替换成nacos，并且使用Feign调用的场景可以不做任何修改。

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