高并发场景下，偶现响应体字段缺失

在对某rest接口做性能压测的时候，并发量1000TPS，偶现client接收到的响应体缺失一些字段
例如server端响应体里有ret:{"code":0, "message":"success"}
但是服务端接收到的响应里ret为null，或者code为null

No files, tests, or entry points are named. Start by reproducing the REST response loss under the reported 1000 TPS load, then trace the response from server serialization through client deserialization. Done means identifying and preventing cases where ret or its code and message fields become null.

Written by the indexing model from the issue text.