That we no longer need to support java 8 for XWiki 14.x. We can remove it from test configs + update the minimal requirement page
That building XWiki will require Java 11 (at least for executing the functional tests). We’ll also need to update the Building page on xwiki.org
I’ll be working on these 2 items in the coming days. Right now I’m trying to upgrade our standalone packaging on master (i.e. XWiki 14.x) to use Jetty 10 (which requires Java 11 to run).
According to IsolatedTestClassLoader javadoc I don’t think it actually needs a URLClassloader. Seems to me, it was just a reflex to assume that it’s always one and that it should have the documented behavior by setting the context classloader as parent instead of using its URLs.