$1000 buy in nlh hand at bellagio

[J.Brown]

This hand has been bothering me for a little over a month so I wanted some feedback on this play. I already have my own opinion about how it was played...so here goes. I had played all day (10+ hrs) down to final 3 tables of this nlh event, that had 220+ entries. I had played rock solid, only one bad play when I doubled up two kings with my two jacks earlier in the event and it could have been avoided, but... With the blinds at (my memory fails exactly but) 300-600 and 50 or 75 ante, I have about 9500 and a medium stack for my table I look down on two jacks on the button. Folded around to me and I make it 4000 to go and I am promptly raised all of my chips by the small blind who is the chip leader of the entire tournament by about triple anyone elses chips. He had not played a hand since I had joined that table, roughly 45 minutes, what do you do? Please critique and give idea of best plan of attack, pre and post raise. Those damn jacks are so tricky in nlh!!!! Thanks JBrown