【dubbo异常处理】Fail to decode request due to: RpcInvo

生产中与其他厂商的微服务进行rpc间的调用时，dubbo抛出 Fail to decode request due to: RpcInvocation的异常。

目录

• 一、问题的起源
• 二、问题的处理
• • ① 检查dubbo中suer、provider中接口方法是否注册
  • ②查看provider的实时日志发现，dubbo报出以下提示
  • ③对比provider、consumer中setlListInfoUpldA方法的入参
  • ④ 将provider、consumer中setlListInfoUpldA方法入参中相同字段的类型保持一致
• 三、问题的验证
• • ①观察实时日志发现，此时dubbo间服务的调用已经通了，只是服务抛出了dubbo的异常信息，并未将代码的错误信息真正抛出。

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一、问题的起源

微服务通过dubbo的调用时报错信息如下

{"output":null,"infcode":-1,"inf_refmsgi`d`":null,"refmsg_time":null,"respond_time":null,"err_msg":"fsi调用mbs异常Failed to invoke the method setlListInfoUpldA in the service .hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService. Tried 3 times of the providers [10.130.128.178:20880] (1/1) from the registry poercloud.nginx:20003 on the consumer 10.130.130.109 using the dubbo version 2.7.3. Last error is: Failed to invoke remote method: setlListInfoUpldA, provider: dubbo://10.130.128.178:20880/.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService?anyhost=true&application=hsa-mbs-fsi-nation&bean.name=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService&category=providers&check=false&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&group=rpc-mbs&interface=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService&lazy=false&methods=getTcmDiseByDiseName,setlListInfoUpldA,getWmDiseByDiseName,querySetlListInfo,querySetlDetail,setlListInfoUpld,querySetlList,onpayPatnMdtrtUpld,queryAdmdvsTreeAll&path=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService&pid=115592&protocol=dubbo&qos.enable=false®ister=true®ister.ip=10.130.130.109&release=2.7.3&remote.application=hsa-mbs-local&revision=1.0.0&side=consumer&sticky=false&timeout=30000×tamp=1651394722080&version=1.0.0, cause: .apache.dubbo.remoting.RemotingException: Fail to decode request due to: RpcInvocation [methodName=setlListInfoUpldA, parameterTypes=null, arguments=null, attachments={path=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService, input=6565, dubbo=2.0.2, version=1.0.0}]"}

二、问题的处理 ① 检查dubbo中suer、provider中接口方法是否注册

consumer中的setlListInfoUpldA方法是注册到dubbo中的。

provider中的setlListInfoUpldA方法也是存在的。

②查看provider的实时日志发现，dubbo报出以下提示

发现provider实时日志中，只是Warn入参的字段类型转化异常，并未提示Error。

③对比provider、consumer中setlListInfoUpldA方法的入参

发现provider中setlListInfoUpldA方法入参中lv3NurscareDays字段的类型为BigDecimal，而consumer中lv3NurscareDays字段的类型为Integer。

④ 将provider、consumer中setlListInfoUpldA方法入参中相同字段的类型保持一致 三、问题的验证 ①观察实时日志发现，此时dubbo间服务的调用已经通了，只是服务抛出了dubbo的异常信息，并未将代码的错误信息真正抛出。

   "err_msg": "fsi调用mbs异常Failed to invoke the method setlListInfoUpldA in the service .hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService. Tried 3 times of the providers [10.130.128.178:20880] (1/1) from the registry poercloud.nginx:20003 on the consumer 10.130.130.109 using the dubbo version 2.7.3. Last error is: Failed to invoke remote method: setlListInfoUpldA, provider: dubbo://10.130.128.178:20880/.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService?anyhost=true&application=hsa-mbs-fsi-nation&bean.name=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService&category=providers&check=false&deprecated=false&dubbo=2.0.2&dynamic=true&generic=false&group=rpc-mbs&interface=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService&lazy=false&methods=getTcmDiseByDiseName,setlListInfoUpldA,querySetlListInfo,getWmDiseByDiseName,setlListInfoUpld,querySetlDetail,onpayPatnMdtrtUpld,querySetlList,queryAdmdvsTreeAll&path=.hsa.mbs.fmi.api.medinfoupload.service.FmiMedInfoUploadService&pid=139627&protocol=dubbo&qos.enable=false®ister=true®ister.ip=10.130.130.109&release=2.7.3&remote.application=hsa-mbs-local&revision=1.0.0&side=consumer&sticky=false&timeout=30000×tamp=1652856548356&version=1.0.0, cause: .apache.dubbo.remoting.RemotingException: java.io.IOException: Response data error, expect Throable, but get {code=240000, suppressedExceptions=[], cause=(this Map), stackTrace=[Ljava.lang.StackTraceElement;@2f51191c, detailMessage=查询不到对应的医师或护士，请求确认蚕食是否正确}njava.io.IOException: Response data error, expect Throable, but get {code=240000, suppressedExceptions=[], cause=(this Map), stackTrace=[Ljava.lang.StackTraceElement;@2f51191c, detailMessage=查询不到对应的医师或护士，请求确认蚕食是否正确}ntat .apache.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.handleException(DecodeableRpcResult.java:146)ntat .apache.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:96)ntat .apache.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:112)ntat .apache.dubbo.rpc.protocol.dubbo.DubboCodec.decodeBody(DubboCodec.java:92)ntat .apache.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:122)ntat .apache.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:82)ntat .apache.dubbo.rpc.protocol.dubbo.DubboCountCodec.decode(DubboCountCodec.java:48)ntat .apache.dubbo.remoting.transport.ty4.NettyCodecAdapter$InternalDecoder.decode(NettyCodecAdapter.java:90)ntat io.ty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:502)ntat io.ty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:441)ntat io.ty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:278)ntat io.ty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)ntat io.ty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:345)ntat io.ty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:337)ntat io.ty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1408)ntat io.ty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:359)ntat io.ty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:345)ntat io.ty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:930)ntat io.ty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)ntat io.ty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:677)ntat io.ty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:612)ntat io.ty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:529)ntat io.ty.channel.nio.NioEventLoop.run(NioEventLoop.java:491)ntat io.ty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:905)ntat io.ty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)ntat java.lang.Thread.run(Thread.java:748)n",