Hadrian have been working hard to get it resolved and encountered different issues whenever he got one obstacle resolved.
However as this time of writing the release build is in progress and it looks good.
You may wonder why these issues? Yeah it was a few factors such as an Apache infrastructure upgrade causing weird issues with documentation generation and whatnot.
And Maven itself had some issues :) It is fantastic how brittle it becomes, but there are also a ton of various plugins needed for doing a release.
However if all goes well the RC is published today/tomorrow and the Apache voting produce can start.
And if all goes well then it should be out by next week, or at the latest start of next month if any blocker is found in the release candidate.