[Bug] com.alibaba.fastjson2.JSONException: not support autotype : [String, offset 10

[390237]

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Apache Dubbo Component

Java SDK (apache/dubbo)

Dubbo Version

Dubbo java 3,2.11 jdk1.8

Steps to reproduce this issue

When using the default fastjson2, if the interface contains a parameter that is: String[], the error is returned: com.alibaba.fastjson2.JSONException: not support autotype : [String, offset 10, When the production side is changed to Hessian2, it can be used normally, and fastjson2 can support the String[] parameter?

当使用默认fastjson2,接口如果包含有参数是：String[]，返回错误：com.alibaba.fastjson2.JSONException: not support autotype : [String, offset 10， 当将生产端改成Hessian2，就可以正常使用，可以让fastjson2支持String[]参数？

What you expected to happen

Can fastjson2 support String[]?

Anything else

No response

Are you willing to submit a pull request to fix on your own?

• [ ] Yes I am willing to submit a pull request on my own!

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[heliang666s]

这也许是fastjson的问题而不是dubbo的问题

[bert82503]

这也许是fastjson2的问题，而不是dubbo的问题

是fastjson2的问题。

Dubbo3.2默认使用fastjson2，升级过程中遇到一些fastjson2参数序列化问题。出于安全风险考虑，最终选择退回到hessian2，升级所有核心应用到生产环境的目标才完成。 建议统一使用hessian2参数序列化，与先前保持一样，因为有很多奇葩的响应返回结构。 @390237

fastjson2当前还不是很稳定，遇到的问题不少，参数序列化的性能收益也较低。

Dubbo应用可观测性升级指南与踩坑记录 https://blog.csdn.net/shupili141005/article/details/137884052

[390237]

嗯，已经指定使用hessian2了，主要觉得dubbo在fastjson2还没完全稳定情况下，将默认序列化强制成fastjson2，太冒险了。

[wcy666103]

hessian2 在高版本的jdk下也有问题https://github.com/apache/dubbo/issues/14259 不过现在dubbo默认序列化就是hessian2呀

Please close this pr as completed

[bert82503]

hessian2 在高版本的jdk下也有问题#14259 不过现在dubbo默认序列化就是hessian2呀

Please close this pr as completed

尝试策略回退，也是不得已而为之，说明此变更对用户使用体验不是很好 😄 #13974