Help with timeout-problems for http monitors

[lsx1205]

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📝 Describe your problem

In the process of using kuma, sometimes the detection timeout problem occurs. I configured the detection once in 60 seconds, retry three times, and the timeout period is 10 seconds. However, after the detection timeout alarm, I checked it immediately and found that my URL access is normal and the server deployed kuma can be accessed normally. What could be the cause?

📝 Error Message(s) or Log

kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:56:34+08:00 [MONITOR] WARN: Monitor #45 'xxxx': Pending: Child inaccessible | Max retries: 0 | Retry: 0 | Retry Interval: 60 seconds | Type: group kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:59:00+08:00 [MONITOR] WARN: Monitor #61 'xxxxxx.com': Pending: timeout of 10000ms exceeded | Max retries: 3 | Retry: 1 | Retry Interval: 30 seconds | Type: http kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:59:10+08:00 [MONITOR] WARN: Monitor #73 'xxxxxx.com': Pending: timeout of 10000ms exceeded | Max retries: 3 | Retry: 1 | Retry Interval: 30 seconds | Type: http kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:59:26+08:00 [MONITOR] WARN: Monitor #65 'xxxxxx.com': Pending: timeout of 10000ms exceeded | Max retries: 3 | Retry: 1 | Retry Interval: 30 seconds | Type: http kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:59:34+08:00 [MONITOR] WARN: Monitor #45 'xxxxx': Pending: Child inaccessible | Max retries: 0 | Retry: 0 | Retry Interval: 60 seconds | Type: group kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:59:44+08:00 [MONITOR] WARN: Monitor #71 'xxxxxx.com': Pending: timeout of 10000ms exceeded | Max retries: 3 | Retry: 1 | Retry Interval: 30 seconds | Type: http kuma_uptime-kuma.1.iuwe0k3x06mg@ops-ser | 2024-10-24T19:59:50+08:00 [MONITOR] WARN: Monitor #73 'xxxxxx.com': Pending: timeout of 10000ms exceeded | Max retries: 3 | Retry: 2 | Retry Interval: 30 seconds

🐻 Uptime-Kuma Version

1.23.13

💻 Operating System and Arch

rocky linux 9.4

🌐 Browser

google chrome

🖥️ Deployment Environment

• Runtime: docker
• Database: sqlite
• Filesystem used to store the database on:
• number of monitors:

[CommanderStorm]

A bunch of things could be causing spurious timeout issues.

Here are a few thoughts:

• firewalls / reverse proxy's/ CDNs/.. other stuff in the network path
• badly configured routing table
• DNS contains multiple records and one of them timeouts
• ipv6 or ipv4 issues with timeouts