tengine使用dyups后，会出现部分请求502

[Dimp1e]

Ⅰ. Issue Description

我们目前使用的是：
Tengine version: Tengine/2.3.3 nginx version: nginx/1.18.0
做7层负载，且加了dyups模块。节点的配置是8c16g，在请求量稍微高点的情况下（1000+/s）,会出现部分请求502。查看access.log 发现502的情况upstream_addr里填充的是 配置里定义的变量名（正常的情况下应该是指定的后端节点）
过程中没有upstream的变更

Ⅱ. Describe what happened

error log中也没什么相关的报错，有问题的请求access log如下：
{"time_local":"10/Oct/2024:23:22:46 +0800","http_x_forwarded_for":"","remote_addr":"2408:8440:9488:379b:5878:89df:b959:6475","remote_port":"60495","server_addr":"fd00:172:28:50::149","upstream_addr":"xxx-xxx_xxx","status":"502","bytes_sent":"832","body_bytes_sent":"631","request_length":"615","upstream_response_length":"0","request_time":"0.000","request_method":"POST","scheme_host_uri":"https://xxxxxxxx.com/gapi/o2o/aggregatePay/services/noticePointForAggregatePay","query_string":"","http_host":"xxxxxxx.com","http_referer":"https://xxxxx.com.cn/","http_user_agent":"Mozilla/5.0 (iPhone; CPU iPhone OS 17_6_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 MicroMessenger/8.0.51(0x1800332e) NetType/4G Language/zh_CN"}
其中域名部分信息已做脱敏

Ⅲ. Describe what you expected to happen

以下是正常的请求：
{"time_local":"11/Oct/2024:00:00:59 +0800","http_x_forwarded_for":"","remote_addr":"2408:844b:e00:a273:255f:66c:48c7:fd5f","remote_port":"15057","server_addr":"fd00:172:28:50::149","upstream_addr":"172.28.178.xx:8030","status":"200","bytes_sent":"339","body_bytes_sent":"63","request_length":"331","upstream_response_length":"63","request_time":"0.048","request_method":"POST","scheme_host_uri":"https://xxxxxxxx.com/gapi/o2o/aggregatePay/services/noticePointForAggregatePay","query_string":"","http_host":"xxxxxxxx.com","http_referer":"https://xxxxxxxx.bestpay.com.cn/","http_user_agent":"Mozilla/5.0 (iPhone; CPU iPhone OS 16_1_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 MicroMessenger/8.0.52(0x18003425) NetType/4G Language/zh_CN"}