General Question

Okay, blinds are at 25/50...and i've got 1700 in chips. I'm in the bb with JJ.....early position raises to 125...2 callers....i call....flop is 10 9 6 rainbow. Early position bets pot...2 folders i call.....turn is 2....he only has 250 left and moves all in...i call...he turns up KK.....any suggestions on this hand where i went wrong or what i could have done differently. This scenerio comes up a lot of for me and am having trouble in general in tournaments because of this play exactly.