Next.js · Senior · Question 71 of 75

A CDN in front of a self-hosted Next.js keeps serving an old page after `revalidateTag()`. Why?

✓Correct answer: Revalidation clears only the Next.js server cache; the CDN keeps its copy until s-maxage expires unless you purge it
2revalidateTag doesn't work when self-hosting
3CDNs ignore Cache-Control

Explanation

ISR pages are sent with s-maxage and stale-while-revalidate. Call the CDN purge API for both HTML and RSC variants alongside revalidation.

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