Major Description
Admin#isTableAvailable checks if it can getServerName for the meta entries it reads. During the time of split server location are added to the meta entries in MetaTableAccessor#splitRegion although the description of the method says "Does not add the location information to the daughter regions since they are not open yet.". At this point during the split daughter regions are not actually open, so we can get to a state where parent is offline, daughters are not yet open but isTableAvailable returns true.