Sitemap XML generated with incorrect https namespace instead of http (Metadata) - Google Search Console error #81644
Description
Link to the code that reproduces this issue
https://github.com/christiancenti/reproduction-sitemap-bug
To Reproduce
- Use MetadataRoute.Sitemap to generate a sitemap with language alternates in Next.js.
- Inspect the resulting sitemap XML.
- Submit the sitemap to Google Search Console.
- Observe the "incorrect namespace" error.
Current vs. Expected behavior
Current:
The sitemap XML generated by the Next.js Metadata system uses https in the namespace declarations:
This causes Google Search Console to report an "incorrect namespace" error.
Expected:
The generated sitemap XML should use the official http namespaces as per spec:
- xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
- xmlns:xhtml="http://www.w3.org/1999/xhtml"
Google Search Console should accept the sitemap without namespace errors.
Provide environment information
Relevant Packages:
next: 15.4.0-canary.129
Additional context
- File reference: packages/next/src/build/webpack/loaders/metadata/resolve-route-data.ts
- See Google community discussion: https://support.google.com/webmasters/thread/357720871/sitemap-error-incorrect-namespace-in-google-search-console
Thank you for your help!