I took a look at mine, it has similar bumps on the trunk and larger branches, it has yet to bloom also, but it doing very well. I think it's practically doubled in size over the last year or 9 months.
Maybe they are future buds, once the tree is ready?? I guess we'll see. I do love my Jab, even if it never blooms, it's just such a gorgeous tree, it reminds me of a very large bonsai tree, if there could be such.
Here is a pic of my Jab. In the back left is a poor little Satsuma orange tree (I know it's technically a tangerine). I had to cage it off as the deer kept eating every single flush of new growth it had, almost killed it.