Troubleshooting & FAQ¶

Sorted by symptom. Each page walks through causes in order, with concrete diagnostic commands and fixes.

Common symptoms¶

Host stuck NO_DATA / grey — decision tree Agent vs. Collector vs. Active-Checker, reading agent.log
No notification despite a red check — wait time, rule matching, downtime/ACK, inhibition
Too many notifications — grouping, timing, flapping, maintenance windows
UI issues after an update — hard reload, startup splash, browser cache
Login / 2FA issues — lockout behavior, admin reset paths
Storage keeps growing — retention, biggest data producers, logs as a driver
Live-tail/SSE shows nothing — buffering behind your own reverse proxy
Discovery finds nothing — collector subnets, SNMP communities, scan profile
Support bundle & feedback — build a diagnostics bundle, direct contact

Troubleshooting (general) — infrastructure-level symptoms: containers, wizard, updates, pipeline health
FAQ — quick answers to common questions