The Debian package is the only one that still declares a Java dependency (https://github.com/jenkinsci/packaging/commit/188ffd36c2abd83ca9e572b6b1fb6d2f423685bc) but it declares ≥8.

This can in some cases result in Java 9 installations when those appear to not work with Jenkins.

If possible the dependency should be limited to exactly Java 8, or dropped altogether with corresponding explanation on the package listing page.

Similarly, Java dependency documentation for Opensuse/Redhat should be reviewed to ensure we don't claim Java 9 compatibility.