My flop call was doniksih, but on the river, re-raise? He probably has AK, AA, KK, QQ or even underpair? I've seen him re-raise with QKo but thats about it

PokerStars No-Limit Hold'em, $0.10 BB (9 handed) from (Format: FlopTurnRiver)

MP3 ($11.55)
CO ($11.30)
Button ($3.65)
SB ($2.70)
Hero ($10.45)
UTG ($12.85)
UTG+1 ($9.80)
MP1 ($12.45)
MP2 ($2.50)

Preflop: Hero is BB with T, 9.
UTG calls $0.10, 2 folds, MP2 raises to $0.2, 2 folds, Button calls $0.20, SB calls $0.15, Hero calls $0.10, UTG raises to $1, MP2 calls $0.80, Button folds, SB folds, Hero calls $0.80.

Flop: ($3.40) 4, J, 4 (3 players)
Hero checks, UTG bets $2, MP2 calls $1.50 (All-In), Hero calls $2.

Turn: ($8.90) J (3 players, 1 all-in)
Hero checks, UTG checks.

River: ($8.90) 8 (3 players, 1 all-in)
Hero checks, UTG bets $3, Hero ???

Final Pot: $14.90

I am not sure if I call that after raise even, but I would probably call on the river expecting to be beat by a higher flush maybe?? The small amount of the bet seems to be wanting a call, or baiting you for a raise. The fact the he limped and then called a small raise might indicate suited cards? I am a noob similar to yourself, so take what I think with a grain of salt.

the board JJ44....

you think maybe he has a J?

I'd fold probably

You would have to be mentally insane to raise that river with a flush, really i'd probably call though due to the size of the pot and the fact that you checked the turn and river to him, giving him the opportunity to bluff.

Holy cow...I totally missed the Jack....I have so much to learn (smacks myself on the head)...he almost has to have a full house I would think.

AK, AA, KK, QQ or even underpair not a possibility? I could lose only to a J or higher flush?

Or a 4. And those hands are a possibility which is why you have to call but do you really think he's calling a re-raise with any of those hands? And he just MAY be donkish enough to push with AA/KK/QQ there forcing you to fold your flush, yet another reason not to re-raise.

A reminder for everyone... UTG limp-raised. Consider the typical limp-raise hands. None of them involve a J or a 4. Call this river - don't re-raise on the double paired board, you will only be called by a full house.