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How a Linux Kernel Upgrade Broke MongoDB on an Azure VM — And How We Fixed It
It was a normal morning. I woke up, grabbed my coffee, and before I'd even properly sat down my phone was already lighting up — alerts, messages, the whole thing. The app was down. Users couldn't connect, services were throwing errors, and nobody had the faintest idea why.
The confusing part? Nobody had touched anything. No deploy the night before, no config change, no code push. I'd left everything green and healthy when I logged off, and I woke up to a dead server. That's the kind of outage...
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