ok, so i figured it out. it's not related so much to mongo3.x but just a gap in upgrade logic.
basically when creating indices, the mongo backend never checks to see if collection exists (it gets created when the first document is written)... i've added a check to create the collection beforehand.
ok, so i figured it out. it's not related so much to mongo3.x but just a gap in upgrade logic.
basically when creating indices, the mongo backend never checks to see if collection exists (it gets created when the first document is written)... i've added a check to create the collection beforehand.