在SpringCloud中会有多个微服务各个服务之间如果要进行通信要进行调用的话使用的就是dubbo或者openfeign。一、dubbo的使用大体步骤1.生产方和消费方pom.xml引入依赖!--常规依赖-- dependency groupIdcom.alibaba.cloud/groupId artifactIdspring-cloud-starter-dubbo/artifactId /dependency本案例项目使用的是下面的依赖包2.生产方和消费方启动类加入标注“EnableDubbo”3.配置application.yml参考格式如下# 内置配置 不允许修改 如需修改请在 nacos 上写相同配置覆盖 dubbo: application: logger: slf4j # 元数据中心 local 本地 remote 远程 这里使用远程便于其他服务获取 metadataType: remote # 可选值 interface、instance、all默认是 all即接口级地址、应用级地址都注册 register-mode: instance service-discovery: # FORCE_INTERFACE只消费接口级地址如无地址则报错单订阅 2.x 地址 # APPLICATION_FIRST智能决策接口级/应用级地址双订阅 # FORCE_APPLICATION只消费应用级地址如无地址则报错单订阅 3.x 地址 migration: FORCE_APPLICATION # 注册中心配置 registry: address: nacos://${spring.cloud.nacos.server-addr} group: DUBBO_GROUP parameters: namespace: ${spring.profiles.active} # 消费者相关配置 consumer: # 结果缓存(LRU算法) # 会有数据不一致问题 建议在注解局部开启 cache: false # 支持校验注解 validation: jvalidationNew # 调用重试 不包括第一次 0为不需要重试 retries: 0 # 初始化检查 check: falsedubbo: application: # 关闭qos端口避免单机多生产者端口冲突 如需使用自行开启 qos-enable: false protocol: # 如需使用 Triple 3.0 新协议 可查看官方文档 # 使用 dubbo 协议通信 name: dubbo # dubbo 协议端口(-1表示自增端口,从20880开始) port: -1 # 指定dubbo协议注册ip # host: 192.168.0.100 # 消费者相关配置 consumer: # 超时时间 timeout: 3000 scan: # 接口实现类扫描 base-packages: org.sharetek.**.dubbo # 自定义配置 custom: # 全局请求log request-log: true # info 基础信息 param 参数信息 full 全部 log-level: info4.生产方对外公开服务实现类用注解DubboService5.Dubbo正常使用二、错误场景演示及原因分析{ code: 500, msg: Failed to invoke the method getSecurityUserInfo in the service org.sharetek.system.api.RemoteSecurityUserService. Tried 1 times of the providers [192.168.72.1:20880] (1/1) from the registry 127.0.0.1:8848 on the consumer 192.168.72.1 using the dubbo version 3.2.7. Last error is: Failed to invoke remote method: getSecurityUserInfo, provider: DefaultServiceInstance{serviceNamesharetek-system, host192.168.72.1, port20880, enabledtrue, healthytrue, metadata{dubbo.endpoints[{\port\:20880,\protocol\:\dubbo\}], dubbo.metadata.revision2156754ed82fcb6bf50a8f846acf3287, dubbo.metadata.storage-typeremote, timestamp1708243528944}}, service{nameorg.sharetek.system.api.RemoteSecurityUserService,groupnull,versionnull,protocoldubbo,port20880,params{sideprovider, release3.2.7, methodsgetSecurityUserInfo, loggerslf4j, deprecatedfalse, dubbo2.0.2, interfaceorg.sharetek.system.api.RemoteSecurityUserService, service-name-mappingtrue, genericfalse, metadata-typeremote, applicationsharetek-system, prefer.serializationfastjson2,hessian2, dynamictrue},}, cause: org.apache.dubbo.remoting.RemotingException: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type org.sharetek.common.dubbo.properties.DubboCustomProperties available\r\norg.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type org.sharetek.common.dubbo.properties.DubboCustomProperties available\r\n\tat org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:341)\r\n\tat org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:332)\r\n\tat cn.hutool.extra.spring.SpringUtil.getBean(SpringUtil.java:122)\r\n\tat org.sharetek.common.dubbo.filter.DubboRequestFilter.invoke(DubboRequestFilter.java:24)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.ClassLoaderCallbackFilter.invoke(ClassLoaderCallbackFilter.java:38)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat com.alibaba.dubbo.rpc.Invoker$CompatibleInvoker.invoke(Invoker.java:76)\r\n\tat io.seata.integration.dubbo.alibaba.AlibabaDubboTransactionPropagationFilter.invoke(AlibabaDubboTransactionPropagationFilter.java:45)\r\n\tat com.alibaba.dubbo.rpc.Filter.invoke(Filter.java:34)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.protocol.dubbo.filter.TraceFilter.invoke(TraceFilter.java:80)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.TimeoutFilter.invoke(TimeoutFilter.java:45)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat com.alibaba.csp.sentinel.adapter.dubbo3.SentinelDubboProviderFilter.invoke(SentinelDubboProviderFilter.java:81)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.seata.SeataTransactionPropagationProviderFilter.invoke(SeataTransactionPropagationProviderFilter.java:66)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:108)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.ExceptionFilter.invoke(ExceptionFilter.java:55)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.AccessLogFilter.invoke(AccessLogFilter.java:119)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.metrics.observation.ObservationReceiverFilter.invoke(ObservationReceiverFilter.java:56)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.GenericFilter.invoke(GenericFilter.java:206)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat cn.dev33.satoken.context.dubbo3.filter.SaTokenDubbo3ProviderFilter.invoke(SaTokenDubbo3ProviderFilter.java:47)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.ClassLoaderFilter.invoke(ClassLoaderFilter.java:54)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.EchoFilter.invoke(EchoFilter.java:41)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.metrics.filter.MetricsFilter.invoke(MetricsFilter.java:76)\r\n\tat org.apache.dubbo.metrics.filter.MetricsProviderFilter.invoke(MetricsProviderFilter.java:36)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.ProfilerServerFilter.invoke(ProfilerServerFilter.java:64)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.filter.ContextFilter.invoke(ContextFilter.java:144)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:334)\r\n\tat org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CallbackRegistrationInvoker.invoke(FilterChainBuilder.java:196)\r\n\tat org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol$1.reply(DubboProtocol.java:156)\r\n\tat org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleRequest(HeaderExchangeHandler.java:110)\r\n\tat org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:200)\r\n\tat org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:53)\r\n\tat org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:62)\r\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)\r\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)\r\n\tat org.apache.dubbo.common.threadlocal.InternalRunnable.run(InternalRunnable.java:41)\r\n\tat java.base/java.lang.Thread.run(Thread.java:842)\r\n, data: null }错因分析1.生产方和消费方必须在同一个命名空间同一分组同一个集群好像不是这个原因导致只生效过一次2.redis中存在脏数据需要清理这个的可能性比较大开始一直掉不通后来一直好着// redis客户端执行 del keys * flushall