It may be a good idea for folks to preemptively install the JDK manually.
Note from the list:
"In the near future (exact date TBD), Canonical will remove all Sun JDK packages from the Partner archive. This will be accomplished by pushing empty packages to the archive, so that the Sun JDK will be removed from all users machines when they do a software update. Users of these packages who have not migrated to an alternative solution will experience failures after the package updates have removed Oracle Java from the system."