Simon Willison • 11/19/2025

Quoting Matthew Prince

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This article details the technical cause of a significant Cloudflare network outage on November 18, 2025. It explains how a database permissions change led to an oversized feature file, which exceeded a software limit and caused a panic (thread fl2_worker_thread panicked), resulting in widespread 5xx errors across their network.

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#Database Failure #Network Outage #Incident Postmortem
Quoting Matthew Prince

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