How and Why the Leap Second Affected Cloudflare DNS

As cited in DDIA

John Graham-Cumming. "How and Why the Leap Second Affected Cloudflare DNS." blog.cloudflare.com, January 2017. Archived at archive.org

How the page describes itself

How and why the leap second affected Cloudflare DNS | Cloudflare Blog

At midnight UTC on New Year’s Day, deep inside Cloudflare’s custom RRDNS software, a number went negative when it should always have been, at worst, zero. A little later this negative value caused RRDNS to panic.

From the page's own metadata at blog.cloudflare.com, 2026-08-29.

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https://web.archive.org/web/20250202041444/https://blog.cloudflare.com/how-and-why-the-leap-second-affected-cloudflare-dns/