Call Dubbo Service return NullPointerException

[liu2510865]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.5.3
• Operating System version: Linux version 2.6.32-573.22.1.el6.x86_64 (mockbuild@c6b8.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC) ) 不同的group应该是不同的注册中心 #1 SMP Wed Mar 23 03:35:39 UTC 2016
• Java version: java version "1.8.0_162"

Steps to reproduce this issue

1. call api throw null exception

What actually happens?

If there is an exception, please attach the exception trace:

java.lang.NullPointerExceptionat sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:423)at com.alibaba.com.caucho.hessian.io.JavaDeserializer.instantiate(JavaDeserializer.java:271)at com.alibaba.com.caucho.hessian.io.JavaDeserializer.readObject(JavaDeserializer.java:155)at com.alibaba.com.caucho.hessian.io.SerializerFactory.readObject(SerializerFactory.java:397)at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObjectInstance(Hessian2Input.java:2070)at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObject(Hessian2Input.java:2005)at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObject(Hessian2Input.java:1990)at com.alibaba.dubbo.common.serialize.support.hessian.Hessian2ObjectInput.readObject(Hessian2ObjectInput.java:88)at com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:92)at com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:109)at com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.decodeBody(DubboCodec.java:97)at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:126)at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:87)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:80)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:274)at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:261)at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:349)at org.jboss.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:280)at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:200)at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:44)at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)at java.lang.Thread.run(Thread.java:748)

[Bricks-Man]

Could you push a demo for this issue?Without demo, it is difficult to reproduce this problem.

[carryxyh]

Hi @liu2510865 , does your params have a no-args Constructor (private or public) ?

[liu2510865]

Hi @carryxyh

The calling method is as follows：

[carryxyh]

Yeah, but can u check whether your rpc param has a no-args Constructor?
I just find a xxxMap in your pic..

[liu2510865]

@carryxyh
this is interface statement

Provider:
<dubbo:provider delay="-1"/> <dubbo:registry protocol="zookeeper" address="${dubbo.registry.address}"/> <dubbo:protocol name="dubbo" port="20891" threads="300"/> <dubbo:consumer timeout="10000" check="false"/>
<dubbo:service interface="com.alfred.mobile_service.service.payment.AppPaymentSettlementService" ref="appPaymentSettlementService"/>

[carryxyh]

It seems that you can store any object in your map.
Please check if they all have a parameterless constructor.

[liu2510865]

@carryxyh

I solved this problem ,is caused by a business exception in the service.

thanks

[carryxyh]

OK. I'd like close this issue.