Sitemap: `lastmod` for sitemaps wrong

Contribute Bug
6

Here is the bigger picture behind all this:

sitemap_recent.xml:

  • Only includes all the changed topics from the last 3 days
  • Is renewed every 1 h (Internal Rails cache time of 1 h)
  • Has correct lastmod date in sitemap.xml

sitemap_[1-5].xml:

  • Really includes all and every topic, and also includes all the changed topics from the last 3 days
  • Is renewed every 24 h (Internal Rails cache time of 24 h)
  • sitemap_[2-5].xml have wrong lastmod date of 3.days.ago in sitemap.xml

The wrong lastmod date for sitemap_[2-5].xml does not matter, as Google will get all recent topic changes via sitemap_recent.xml in a timely manner.