E.g. google "spring boot externalize properties"
First search result is https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-external-config.html
The link returns a 404 not found!
The documentation was re-structured a bit in 2.2 and Google hasn't caught up yet, unfortunately. The correct URL is https://docs.spring.io/spring-boot/docs/current/reference/html/spring-boot-features.html#boot-features-external-config. Let's see if we can do something to smooth things out.
Could you add some redirection to some index of a section or something? Or redirect links in the old format to documentation for 2.1.9.RELEASE (or latest 2.1)?
That change broke basically every link to "current" Spring documentation out there.
I know it's not a real issue, though
Redirects are now in place so you should no longer get 404s for any current documentation links. Please let us know if that's not the case.
Someone in the community found a candidate: https://docs.spring.io/spring-boot/docs/current/reference/html/common-application-properties.html should redirect to https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html
It looks like the appendixes haven't been handled.
The links to appendixes are working again.