做文件上传功能时，dubbo对MultipartFile文件传输时，一个bug：Fail to decode request due to: RpcInvocation...

三月 22, 2019 2:37:27 下午 org.apache.catalina.core.StandardWrapperValve invoke
严重: Servlet.service() for servlet [taotao-manager-web] in context with path [] threw exception [Request processing failed; nested exception is com.alibaba.dubbo.rpc.RpcException: Failed to invoke the method uploadPicture in the service com.taotao.manager.service.PictureService. Tried 3 times of the providers [192.168.138.1:20880] (1/1) from the registry 192.168.138.128:2181 on the consumer 192.168.138.1 using the dubbo version 2.5.3. Last error is: Failed to invoke remote method: uploadPicture, provider: dubbo://192.168.138.1:20880/com.taotao.manager.service.PictureService?anyhost=true&application=taotao-manager-web&check=false&dubbo=2.5.3&interface=com.taotao.manager.service.PictureService&methods=uploadPicture&pid=20660&revision=1.0-SNAPSHOT&side=consumer&timeout=1000000×tamp=1553236601190, cause: Fail to decode request due to: RpcInvocation [methodName=uploadPicture, parameterTypes=null, arguments=null, attachments={path=com.taotao.manager.service.PictureService, input=883, dubbo=2.5.3, version=0.0.0}]] with root cause
com.alibaba.dubbo.remoting.RemotingException: Fail to decode request due to: RpcInvocation [methodName=uploadPicture, parameterTypes=null, arguments=null, attachments={path=com.taotao.manager.service.PictureService, input=883, dubbo=2.5.3, version=0.0.0}]
    at com.alibaba.dubbo.remoting.exchange.support.DefaultFuture.returnFromResponse(DefaultFuture.java:190)
    at com.alibaba.dubbo.remoting.exchange.support.DefaultFuture.get(DefaultFuture.java:110)
    at com.alibaba.dubbo.remoting.exchange.support.DefaultFuture.get(DefaultFuture.java:84)
    at com.alibaba.dubbo.rpc.protocol.dubbo.DubboInvoker.doInvoke(DubboInvoker.java:96)
    at com.alibaba.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:144)
    at com.alibaba.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:74)
    at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75)
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)
    at com.alibaba.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:53)
    at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)
    at com.alibaba.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:48)
    at com.alibaba.dubbo.rpc.protocol.Protocol