Oracle changed the distribution terms of TZUpdater from free (as in beer) to available only to paying customers at least half a year ago.

It should be noted, though, that this largely affects only users that for some reason can't update their JRE and are lagging behind the latest version. Oracle still provides up-to-date versions of the TZ data with the latest JRE.

It's not a big issue since one could use IBM's TZ updater tool or compile the TZ data from the raw Olson TZ database using javazic.jar available from OpenJDK.