批量的图片流请求，概率性流响应为空

如下图，当同时并发请求20张左右的小图片流时，会存在小概率情况响应大小为空的情况。服务端那边的access日志显示响应正常。


麻烦提供一下问题定位思路。

Start by reproducing the issue with about 20 concurrent requests for small image streams and compare the client-observed response sizes with the server access logs. The issue mentions no source files or tests; done means identifying why a response can be empty despite a normal server log and documenting a focused next step or fix.

Written by the indexing model from the issue text.