调用同事的dubbo接口所有的配置都检查过没有问题，可以注入当代码走到调用注入的接口时报异常：
java.lang.reflect.InvocationTargetException
接口那边的同事说请求可以过去 但是在return的时候报异常：
[com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation] - [DUBBO] Decode rpc invocation failed: expected map/object at java.lang.String (Ljava/lang/String;Lorg/bigdata/framework/pay/model/WebDownResourceParam;), dubbo version: 2.8.4, current host: 10.10.184.116
com.alibaba.com.caucho.hessian.io.HessianProtocolException: expected map/object at java.lang.String (Ljava/lang/String;Lorg/bigdata/framework/pay/model/WebDownResourceParam;)
at com.alibaba.com.caucho.hessian.io.AbstractDeserializer.error(AbstractDeserializer.java:108)
at com.alibaba.com.caucho.hessian.io.AbstractMapDeserializer.readObject(AbstractMapDeserializer.java:70)
at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObject(Hessian2Input.java:1696)
at com.alibaba.dubbo.common.serialize.support.hessian.Hessian2ObjectInput.readObject(Hessian2ObjectInput.java:94)
at com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:150)
at com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcInvocation.decode(DecodeableRpcInvocation.java:74)
at com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.decodeBody(DubboCodec.java:138)
at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:134)
at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:95)
at com.alibaba.dubbo.rpc.protocol.dubbo.DubboCountCodec.decode(DubboCountCodec.java:46)
at com.alibaba.dubbo.remoting.transport.netty.NettyCodecAdapter$InternalDecoder.messageReceived(NettyCodecAdapter.java:134)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:109)
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:90)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
[com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec] - [DUBBO] Skip input stream 330, dubbo version: 2.8.4, current host: 10.10.184.116
[com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol] - [DUBBO] disconected from /10.20.21.130:52655,url:dubbo://10.10.184.116:9977/org.bigdata.framework.security.iservice.SecurityFacadeService?anyhost=true&application=dubbo-webservice-provider&channel.readonly.sent=true&codec=dubbo&default.delay=-1&default.retries=0&default.timeout=100000&delay=-1&dubbo=2.8.4&generic=false&heartbeat=60000&interface=org.bigdata.framework.security.iservice.SecurityFacadeService&methods=intercept,encrypt&organization=dubbox&owner=programmer&pid=28695&side=provider×tamp=1499949941270, dubbo version: 2.8.4, current host: 10.10.184.116
http://blog.csdn.net/u011734144/article/details/53669088
我也遇到了同样的问题，请问怎么解决的哇
给异常类写一个无参构造
就ok了