- [ ] I have searched the
[issues](https://github.com/apache/incubator-dubbo/issues) of this repository
and believe that this is not a duplicate.
- [ ] I have checked the
[FAQ](https://github.com/apache/incubator-dubbo/blob/master/FAQ.md) of this
repository and believe that this is not a duplicate.
### Environment
* Dubbo version: 2.6.2
* Operating System version: linux
* Java version: 1.8
### Steps to reproduce this issue
1. 定义类：
public class JZSVo implements Serializable{
List<Double> arr = new ArrayList<>();
//get方法
//set方法。
}
2. 在producer端赋值
public JZSVo get() {
List<Double> list = new ArrayList<>();
list.add(null);
list.add(null);
list.add(3.0);
JZSVo jzsVo = new JZSVo();
jzsVo.setArr(list);
return jzsVo;
}
3. 在service端接收返回的数据 jzsVo中的arr的第一个、第二个数据应该为null实际为0.0
4.经过测试所有的基础类型：Double/Float/Integer等都会出现这种问题。
### Expected Result
[ Full content available at:
https://github.com/apache/incubator-dubbo/issues/3640 ]
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