dubbo 版本3.0.7，协议protobuf。序列化报错

io.netty.handler.codec.EncoderException: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:125) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) at io.netty.handler.timeout.IdleStateHandler.write(IdleStateHandler.java:304) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) at io.netty.channel.ChannelDuplexHandler.write(ChannelDuplexHandler.java:115) at org.apache.dubbo.remoting.transport.netty4.NettyClientHandler.write(NettyClientHandler.java:88) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1071) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:164) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:750) Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String at org.apache.dubbo.common.serialize.protobuf.support.GenericProtobufObjectOutput.lambda$writeAttachments$0(GenericProtobufObjectOutput.java:146) at java.util.HashMap.forEach(HashMap.java:1291) at org.apache.dubbo.common.serialize.protobuf.support.GenericProtobufObjectOutput.writeAttachments(GenericProtobufObjectOutput.java:146) at org.apache.dubbo.rpc.protocol.dubbo.DubboCodec.encodeRequestData(DubboCodec.java:210) at org.apache.dubbo.remoting.exchange.codec.ExchangeCodec.encodeRequest(ExchangeCodec.java:257) at org.apache.dubbo.remoting.exchange.codec.ExchangeCodec.encode(ExchangeCodec.java:71) at org.apache.dubbo.rpc.protocol.dubbo.DubboCountCodec.encode(DubboCountCodec.java:47) at org.apache.dubbo.remoting.transport.netty4.NettyCodecAdapter$InternalEncoder.encode(NettyCodecAdapter.java:69) at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ... 22 more ] with root cause

org.apache.dubbo.remoting.RemotingException: io.netty.handler.codec.EncoderException: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String io.netty.handler.codec.EncoderException: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:125) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) at io.netty.handler.timeout.IdleStateHandler.write(IdleStateHandler.java:304) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:709) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:792) at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:702) at io.netty.channel.ChannelDuplexHandler.write(ChannelDuplexHandler.java:115) at org.apache.dubbo.remoting.transport.netty4.NettyClientHandler.write(NettyClientHandler.java:88) at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:717) at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:764) at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1071) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute$$$capture(AbstractEventExecutor.java:164) at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java) at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:472) at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500) at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) at java.lang.Thread.run(Thread.java:750) Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.String at org.apache.dubbo.common.serialize.protobuf.support.GenericProtobufObjectOutput.lambda$writeAttachments$0(GenericProtobufObjectOutput.java:146) at java.util.HashMap.forEach(HashMap.java:1291) at org.apache.dubbo.common.serialize.protobuf.support.GenericProtobufObjectOutput.writeAttachments(GenericProtobufObjectOutput.java:146) at org.apache.dubbo.rpc.protocol.dubbo.DubboCodec.encodeRequestData(DubboCodec.java:210) at org.apache.dubbo.remoting.exchange.codec.ExchangeCodec.encodeRequest(ExchangeCodec.java:257) at org.apache.dubbo.remoting.exchange.codec.ExchangeCodec.encode(ExchangeCodec.java:71) at org.apache.dubbo.rpc.protocol.dubbo.DubboCountCodec.encode(DubboCountCodec.java:47) at org.apache.dubbo.remoting.transport.netty4.NettyCodecAdapter$InternalEncoder.encode(NettyCodecAdapter.java:69) at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107) ... 22 more

at org.apache.dubbo.remoting.exchange.support.DefaultFuture.doReceived(DefaultFuture.java:214) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:176) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.remoting.exchange.support.DefaultFuture.received(DefaultFuture.java:164) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.handleResponse(HeaderExchangeHandler.java:60) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.remoting.exchange.support.header.HeaderExchangeHandler.received(HeaderExchangeHandler.java:181) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.remoting.transport.DecodeHandler.received(DecodeHandler.java:51) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.remoting.transport.dispatcher.ChannelEventRunnable.run(ChannelEventRunnable.java:57) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor$RunnableWrapper.run(ThreadlessExecutor.java:184) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.common.threadpool.ThreadlessExecutor.waitAndDrain(ThreadlessExecutor.java:103) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.AsyncRpcResult.get(AsyncRpcResult.java:193) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.waitForResultIfSync(AbstractInvoker.java:264) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:185) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:78) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invokeWithContext(AbstractClusterInvoker.java:378) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:80) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:340) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.router.RouterSnapshotFilter.invoke(RouterSnapshotFilter.java:46) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:321) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:99) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:321) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:51) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:321) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.filter.support.ConsumerContextFilter.invoke(ConsumerContextFilter.java:109) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CopyOfFilterChainNode.invoke(FilterChainBuilder.java:321) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.filter.FilterChainBuilder$CallbackRegistrationInvoker.invoke(FilterChainBuilder.java:193) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.support.wrapper.AbstractCluster$ClusterFilterInvoker.invoke(AbstractCluster.java:92) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:97) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.registry.client.migration.MigrationInvoker.invoke(MigrationInvoker.java:280) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.proxy.InvocationUtil.invoke(InvocationUtil.java:57) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:73) ~[dubbo-3.0.7.jar:3.0.7]
at org.apache.dubbo.demo.DemoServiceDubboProxy1.sayHello(DemoServiceDubboProxy1.java) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_321]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_321]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_321]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_321]
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:344) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:205) ~[spring-aop-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at com.sun.proxy.$Proxy64.sayHello(Unknown Source) ~[na:na]
at com.paddy.study.dubbo.service.GrpcHelloService.sayHello(GrpcHelloService.java:22) ~[classes/:na]
at com.paddy.study.controller.Dubbo3Controller.sayHello(Dubbo3Controller.java:28) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_321]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_321]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_321]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_321]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.37.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.8.RELEASE.jar:5.2.8.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) [tomcat-embed-core-9.0.37.jar:9.0.37]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_321]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_321]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.37.jar:9.0.37]
at java.lang.Thread.run(Thread.java:750) [na:1.8.0_321]