java.lang.NullPointerException: null
        at 
reflectasm.java.lang.NullPointerExceptionConstructorAccess.newInstance(Unknown 
Source) ~[na:na]
        at 
com.esotericsoftware.kryo.Kryo$DefaultInstantiatorStrategy$1.newInstance(Kryo.java:1275)
 ~[kryo-4.0.0.jar!/:na]
        at com.esotericsoftware.kryo.Kryo.newInstance(Kryo.java:1139) 
~[kryo-4.0.0.jar!/:na]
        at 
com.esotericsoftware.kryo.serializers.FieldSerializer.create(FieldSerializer.java:559)
 ~[kryo-4.0.0.jar!/:na]
        at 
com.esotericsoftware.kryo.serializers.FieldSerializer.read(FieldSerializer.java:535)
 ~[kryo-4.0.0.jar!/:na]
        at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:813) 
~[kryo-4.0.0.jar!/:na]
        at 
com.alibaba.dubbo.common.serialize.support.kryo.KryoObjectInput.readObject(KryoObjectInput.java:123)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:90)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:110)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.decodeBody(DubboCodec.java:88) 
~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:121)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:82)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.rpc.protocol.dubbo.DubboCountCodec.decode(DubboCountCodec.java:44)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
com.alibaba.dubbo.remoting.transport.netty.NettyCodecAdapter$InternalDecoder.messageReceived(NettyCodecAdapter.java:133)
 ~[dubbo-2.6.0.jar!/:2.6.0]
        at 
org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:80)
 ~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:564)
 ~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:559)
 ~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:274) 
~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:261) 
~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:349) 
~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:280)
 ~[netty-3.2.5.Final.jar!/:na]
        at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:200) 
~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
 ~[netty-3.2.5.Final.jar!/:na]
        at 
org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:44)
 ~[netty-3.2.5.Final.jar!/:na]
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) 
~[na:1.8.0_172]
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) 
~[na:1.8.0_172]
        at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_172]


[ Full content available at: 
https://github.com/apache/incubator-dubbo/issues/2942 ]
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