One should think that hyper gravity would lead to tissue damage or organ failure, but it seems like rats take it pretty well under +3 g.
Over a number of generations most living organisms would probably adjust to 2-3 g.
So life could possibly thrive on Keplar 452B.
If not in an advanced form then as bacteria.
According to below wikipedia article bacteria can tolerate insane levels of gravity.
Question is. Could we pick up distant alien signals as far away as Keplar 452B?