WordPress Cache Configuration Errors: Post-Mortem Report
Incident: 2,400 Duplicate Orders in 6 Hours Root cause: a Cloudflare “Cache Everything” page rule overrode WooCommerce no-store headers on /checkout/ and /order-received/. The CDN cached the order confirmation page and served it to multiple users. Fix: Cloudflare Cache Rules (bypass for WooCommerce) Lessons Learned Never use “Cache Everything” without explicit WooCommerce exclusions. Set Cache-Control:…
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