A failure ran for nine days before anyone noticed, and the alert for it existed the whole time. What happened to it?

Somebody silenced it during an incident nine days ago to stop the noise, and nothing ever expired the silence. The monitoring was working perfectly and nobody was listening.

Updated Sep 2026 · Grounded in researched DevOps, SRE and platform engineering interview loops, written to a senior-engineer editorial bar, and never padded to hit a word count.