这个怎么搞，有人遇到过吗 #619

yangxujia · 2017-09-08T10:53:54Z

java.lang.NullPointerException: null
	at sun.reflect.GeneratedConstructorAccessor81.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:408)
	at com.alibaba.com.caucho.hessian.io.JavaDeserializer.instantiate(JavaDeserializer.java:275)
	at com.alibaba.com.caucho.hessian.io.JavaDeserializer.readObject(JavaDeserializer.java:159)
	at com.alibaba.com.caucho.hessian.io.SerializerFactory.readObject(SerializerFactory.java:420)
	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$1.run(DeadLockProofWorker.java:44)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)

The text was updated successfully, but these errors were encountered:

chickenlj · 2017-09-09T08:34:09Z

根据堆栈错误应该发生在反序列化阶段，发序列化调用构造函数生成示例抛NPE。检查一下DTO相关的类，构造函数有没有包含处理逻辑的，有没有可能会抛出异常？

参考一下：
http://pfmiles.github.io/blog/recently-hessian-deserialize-problem-and-thread-pool-executor-experience/

miniFrank · 2017-09-26T08:08:04Z

+1

miniFrank · 2017-09-26T08:08:34Z

c.e.a.ControllerMethodTimeActive - URL调用异常. 方法:com.edol.sale.web.GoodsV2Controller#queryPromotionPage, 入参:[EdolRequest(campusId=null, areaId=672687, orgId=268, adminId=null, userId=11789258, userNo=09da17e232834aa05cbbef52f0fbb238e86a7771, deviceNo=400e3066-6062-4bb2-bd2a-50a578d74817, deviceName=iPhone6sPlus, appVersion=IOS_4.0.3, requestIp=null, device_no=null, app_version=IOS_4.0.3, deviceId=null, ip=null, isMiniApp=null)]
java.lang.NullPointerException: null
	at sun.reflect.GeneratedConstructorAccessor318.newInstance(Unknown Source)
	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:523)
	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:104)
	at com.alibaba.dubbo.rpc.protocol.dubbo.DecodeableRpcResult.decode(DecodeableRpcResult.java:121)
	at com.alibaba.dubbo.rpc.protocol.dubbo.DubboCodec.decodeBody(DubboCodec.java:97)
	at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:145)
	at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:91)
	at com.alibaba.dubbo.rpc.protocol.dubbo.DubboCountCodec.decode(DubboCountCodec.java:67)
	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:108)
	at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337)
	at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89)
	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)

footmanFF · 2017-12-06T06:25:14Z

footmanFF · 2017-12-06T06:25:22Z

+1

jason8888888 · 2018-03-06T07:29:25Z

java.lang.ArithmeticException
        at sun.reflect.GeneratedConstructorAccessor62.newInstance(Unknown Source)
        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:305)
        at com.alibaba.com.caucho.hessian.io.JavaDeserializer.readObject(JavaDeserializer.java:194)
        at com.alibaba.com.caucho.hessian.io.SerializerFactory.readObject(SerializerFactory.java:481)
        at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObjectInstance(Hessian2Input.java:2743)
        at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObject(Hessian2Input.java:2683)
        at com.alibaba.com.caucho.hessian.io.Hessian2Input.readObject(Hessian2Input.java:2657)
        at com.alibaba.dubbo.common.serialize.support.hessian.Hessian2ObjectInput.readObject(Hessian2ObjectInput.java:76)
        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:90)
        at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:118)
        at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:79)
        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$1.run(DeadLockProofWorker.java:44)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:745)

imsunv · 2018-06-29T06:13:23Z

use -XX:-OmitStackTraceInFastThrow can solve such exception without stack trace.

ralf0131 · 2018-07-16T07:32:08Z

Hi, can you provide an example to reproduce this issue?

ralf0131 · 2018-07-19T23:39:56Z

Please check the link provided in @chickenlj 's comments.

I am going to close this issue, feel free to reopen it if it still exists.

zhaixiaoxiang · 2018-07-31T03:58:49Z

@chickenlj @ralf0131 大佬们
我们还是有这个问题,偶现的,帖子里面说的加上默认构造方法也试过了,还是偶现有问题
java.lang.NullPointerException: null at 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:129) at com.alibaba.dubbo.remoting.exchange.codec.ExchangeCodec.decode(ExchangeCodec.java:90) 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:108) at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:337) at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:89) 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)
我们的DTO如下:
`
@Setter
@getter
@tostring
public class ModelPriceDTO extends BaseModelDTO implements Serializable {

private static final long serialVersionUID = 3714041108118216990L;
/**
 * 官方指导价(元)
 */
private Integer guidePrice;

/**
 * 经销商指导价(元)
 */
private Integer dealerPrice;

/**
 * 平均价格(元)
 */
private Integer avgPrice;

/**
 * 购置税(元)
 */
private Integer purchase;

/**
 * 价格别名
 */
private String alias;

public ModelPriceDTO() {
}

public ModelPriceDTO(String modelCode) {
    super.setModelCode(modelCode);
}

}
BaseModelDTO如下:
@Setter
@getter
@tostring
public abstract class BaseModelDTO {

/**
 * 车型编码
 */
private String modelCode;

}
`

bert82503 · 2018-11-08T04:57:35Z

@yangxujia @miniFrank @footmanFF @zhaixiaoxiang
我们在生产环境也遇到这个问题，其实问题根源是提供者报了大量的 NPE 异常，JVM 为了性能会做优化，如果频繁地抛出某个异常，会重新编译，不再打印异常堆栈。 这样提供者端会发现看不到异常的stackTrace：

java.lang.NullPointerException: null

提供者返回：RpcResult {"result":null,"exception":java.lang.NullPointerException(null)实例}。

而消费者使用的Hessian2在反序列化时使用Constructor.newInstance()反射构造异常实例：

    protected Object instantiate()
            throws Exception {
        try {
            if (_constructor != null)
                // 通过构造器反射实例化异常实例
                return _constructor.newInstance(_constructorArgs);
            else
                return _type.newInstance();
        } catch (Exception e) {
            throw new HessianProtocolException("'" + _type.getName() + "' could not be instantiated", e);
        }
    }

    // 实例化异常对象
    public NullPointerException() {
        super();
    }

    public RuntimeException() {
        super();
    }

    public Exception() {
        super();
    }

    public Throwable() {
        fillInStackTrace();
    }

    public synchronized Throwable fillInStackTrace() {
        if (stackTrace != null ||
            backtrace != null /* Out of protocol state */ ) {
            fillInStackTrace(0);
            stackTrace = UNASSIGNED_STACK;
        }
        return this;
    }

    // 因为提供者返回的NPE异常信息为null，结果正好使用了Java异常初始化堆栈跟踪StackTrace。结果我们看到的是假的调用堆栈跟踪
    private native Throwable fillInStackTrace(int dummy);

因为提供者返回的NPE异常信息为null，结果正好使用了Java异常初始化堆栈跟踪StackTrace。结果我们看到的是假的调用堆栈跟踪，很凑巧。

详细分析见日志未打印Java异常堆栈跟踪stackTrace

zhaixiaoxiang · 2018-12-14T01:47:30Z

Hi, can you provide an example to reproduce this issue?

Hi,
This demo can recur this issue: https://github.com/zhaixiaoxiang/dubbo-examples/tree/master/hessian-npe-demo.
And this is my analysis for this issue: https://www.yuque.com/fa902k/id5z6r/sr041v

bert82503 · 2018-12-15T15:41:03Z

Hi, can you provide an example to reproduce this issue?

Hi,
This demo can recur this issue: https://github.com/zhaixiaoxiang/dubbo-examples/tree/master/hessian-npe-demo.
And this is my analysis for this issue: https://www.yuque.com/fa902k/id5z6r/sr041v

我确实只列出了关键点，但你的文章很棒👍，非常细致完整地分析。你的第5步之后，我就没再代码走读下去。 @zhaixiaoxiang

…dubbo into fix#619

fix for issue #619 and PR #2956

ralf0131 closed this as completed Jul 19, 2018

zhaixiaoxiang mentioned this issue Dec 13, 2018

[Dubbo-619] Fix consumer will generate wrong stackTrace #2956

Merged

6 tasks

zhaixiaoxiang added a commit to zhaixiaoxiang/incubator-dubbo that referenced this issue Mar 11, 2019

fix apache#619 and PR apache#2956 is not enough

935a67a

zhaixiaoxiang mentioned this issue Mar 11, 2019

[Dubbo-619] Fix #619 and PR #2956 is not enough #3634

Merged

6 tasks

zhaixiaoxiang added a commit to zhaixiaoxiang/incubator-dubbo that referenced this issue Mar 14, 2019

fix apache#619 and PR apache#2956 is not enough

5d084a6

zhaixiaoxiang referenced this issue in zhaixiaoxiang/incubator-dubbo Mar 14, 2019

Merge branch 'fix#619' of https://github.com/zhaixiaoxiang/incubator-…

58e01d7

…dubbo into fix#619

zhaixiaoxiang added a commit to zhaixiaoxiang/incubator-dubbo that referenced this issue Mar 14, 2019

Fix apache#619 and PR apache#2956 is not enough

719fb59

zhaixiaoxiang added a commit to zhaixiaoxiang/incubator-dubbo that referenced this issue Mar 14, 2019

fix apache#619 and PR apache#2956 is not enough

b59551a

zhaixiaoxiang referenced this issue in zhaixiaoxiang/incubator-dubbo Mar 14, 2019

fix#619

13e1ce4

carryxyh pushed a commit that referenced this issue Apr 2, 2019

[Dubbo-619] Fix #619 and PR #2956 is not enough (#3634)

f932d7b

fix for issue #619 and PR #2956

dubbo-bot mentioned this issue Apr 5, 2019

[WeeklyReport] Weekly report for Dubbo 2019-3-29 to 2019-4-5 #3809

Closed

lkj41110 mentioned this issue Oct 27, 2019

服务端抛运行时异常，消费端无堆栈信息打印 #5189

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这个怎么搞，有人遇到过吗 #619

这个怎么搞，有人遇到过吗 #619

yangxujia commented Sep 8, 2017 •

edited by ralf0131

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miniFrank commented Sep 26, 2017

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footmanFF commented Dec 6, 2017

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imsunv commented Jun 29, 2018

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这个怎么搞，有人遇到过吗 #619

这个怎么搞，有人遇到过吗 #619

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