Carnival has temporarily closed two restaurants on all of its ships. Norwegian and Cunard have capped cruise ship capacities and canceled sailings. The cruise industry could be in rocky waters again: Like on-land hospitality companies, cruise lines haven't been immune to worker shortages" amid the Great Resignation. And now, a lack of available cruise workers has begun affecting itineraries and onboard amenities. Not all cruise companies have been as fortunate as Holland America or Royal Caribbean. Guests sailing with Carnival will also be spared from itinerary changes. But this doesn't mean it'll be smooth sailing for the cruise line. Carnival...