长连接异常断开

[beebol]

Describe the bug
新上线一个长连接服务，使用的是SSE与后端长连接通信，连接会出现大概1分钟左右就会断掉。直连后端的nginx是正常的。

bfe版本：bfe_1.5.0_linux_amd64

Screenshots

后端nginx error日志会报一个异常：

2023/09/06 18:01:11 [error] 78284#78284: *212061 upstream prematurely closed connection while reading upstream, client: x.x.x.13, server: api.open
.wutopia.xyz, request: "GET /spaceapi/sse/createConnect?taskType=audio_tools&taskUUID=WS_O230742511173101B20001_amjphsrygmgzrepvnten4rdjqqirqa2if HTTP
/1.1", upstream: "http://127.0.0.1:8012/spaceapi/sse/createConnect?taskType=audio_tools&taskUUID=WS_O230742511173101B20001_amjphsrygmgzrepvnten4rdjqqi
rqa2if", host: "api.open.wutopia.xyz", referrer: "https://www.wutopia.xyz/"

[youerning]

bfe这个时间点有报错的日志么？

[mileszhang2016]

建议看一下BFE的超时设置
https://github.com/baidu/bfe-book/blob/version1/design/timeout/timeout.md
看起来应该某个超时被触发了