failed to decode success response body

### Steps to Reproduce

您好，在开发过程中，返回值如果是包含byte[]的实体对象，在网关就会提示failed to decode success response body错误，并且不是所有情况都报错，而是在byte数组比较大，比如40MB，应用场景如返回预览的PDF数据至前端的时候就会报这个错误，请问这个是什么原因导致的呢？框架版本3.2.4

### Expected Behavior

_No response_

### Servicecomb Version

_No response_

### Additional Context

_No response_

Start by reproducing the gateway error with a Java response entity containing byte[] at increasing sizes, using framework version 3.2.4 and the reported PDF-preview scenario. Compare successful small responses with failures around 40MB. Done means the gateway can decode and return the large response without the reported error.

Written by the indexing model from the issue text.