Ethan-Zhang-ZH opened a new issue, #12198:
URL: https://github.com/apache/apisix/issues/12198
### Description
Route configure:
```
{
"uri": "/*",
"name": "test",
"desc": "test",
"hosts": [
"test.com"
],
"plugins": {
"limit-req": {
"_meta": {
"disable": false
},
"allow_degradation": false,
"burst": 300000,
"key": "remote_addr",
"key_type": "var",
"nodelay": false,
"policy": "local",
"rate": 300000,
"rejected_code": 429,
"rejected_msg": "limit by route rule"
},
"traffic-split": {
"_meta": {
"disable": false
},
"rules": [
{
"weighted_upstreams": [
{
"upstream_id": "561760504339497616",
"weight": 0
},
{
"weight": 100
}
]
}
]
}
},
"upstream": {
"timeout": {
"connect": 6,
"send": 60,
"read": 60
},
"type": "roundrobin",
"checks": {
"active": {
"concurrency": 10,
"healthy": {
"http_statuses": [
200,
302
],
"interval": 5,
"successes": 3
},
"http_path": "/dm0/ping",
"timeout": 3,
"type": "http",
"unhealthy": {
"http_failures": 3,
"http_statuses": [
404,
500,
501,
502,
503,
504,
505
],
"interval": 5,
"tcp_failures": 2,
"timeouts": 5
}
}
},
"scheme": "http",
"discovery_type": "kubernetes",
"pass_host": "pass",
"service_name": "xxx-dm0-test/dm0-test:http",
"keepalive_pool": {
"idle_timeout": 60,
"requests": 1000,
"size": 16
}
},
"status": 1
}
```
Error log:
```
2025/05/08 06:41:52 [error] 54#54: *10943657 [lua] healthcheck.lua:1383:
log(): [healthcheck] (upstream#/xxx/routes/561760694207251088) failed to
receive status line from '7.120.24.22 (7.120.24.22:10000)': timeout, context:
ngx.timer, client: 7.46.25.36, server: 0.0.0.0:80
2025/05/08 06:41:52 [warn] 54#54: *10943657 [lua] healthcheck.lua:1383:
log(): [healthcheck] (upstream#/xxx/routes/561760694207251088) unhealthy
TIMEOUT increment (1/5) for '7.120.24.22(7.120.24.22:10000)', context:
ngx.timer, client: 7.46.25.36, server: 0.0.0.0:80
2025/05/08 06:41:54 [warn] 54#54: *10943793 [lua] healthcheck.lua:1383:
log(): [healthcheck] (upstream#/xxx/routes/561760694207251088) healthy SUCCESS
increment (1/3) for '7.120.24.22(7.120.24.22:10000)', context: ngx.timer,
client: 7.46.25.36, server: 0.0.0.0:80
2025/05/08 06:41:59 [warn] 54#54: *10943949 [lua] healthcheck.lua:1383:
log(): [healthcheck] (upstream#/xxx/routes/561760694207251088) healthy SUCCESS
increment (2/3) for '7.120.24.22(7.120.24.22:10000)', context: ngx.timer,
client: 7.46.25.36, server: 0.0.0.0:80
2025/05/08 06:42:04 [warn] 54#54: *10944079 [lua] healthcheck.lua:1383:
log(): [healthcheck] (upstream#/xxx/routes/561760694207251088) healthy SUCCESS
increment (3/3) for '7.120.24.22(7.120.24.22:10000)', context: ngx.timer,
client: 7.46.25.36, server: 0.0.0.0:80
```
`failed to receive status line from '7.120.24.22 (7.120.24.22:10000)':
timeout` error occur occasionally.
And this is packet capture at the same time. Upstream receive healthcheck
after apisix sock:close (3s timeout).It doesn't feel like a coincidence.
However, I'm unable to determine the root cause. Could you assist me?
### Environment
- APISIX version (run `apisix version`): 3.10.0
- Operating system (run `uname -a`):
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`):
- etcd version, if relevant (run `curl
http://127.0.0.1:9090/v1/server_info`):
- APISIX Dashboard version, if relevant:
- Plugin runner version, for issues related to plugin runners:
- LuaRocks version, for installation issues (run `luarocks --version`):
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