My pina colada is the same way. It had massive blooming last year, but only a few fruit set which later fell off. I was ok with that because it was only on its second year. This year, again, it has beautiful massive flowering, but only a couple of tiny fruitlets. It isn't poor pollination or disease, there are no female flowers. I'm wondering if this is just some age related hormonal issue for the tree, or can I expect to be frustrated and disappointed by this tree every year?