If, somehow, every player on a Clan war game agree not to surrender/eliminate/booted so they can stall a CW game, what happens? Would the CW game force to shut down by admins?

It's 2 minute autoboot, the game's not lasting more than a day or two unless someone bots.

ie. Not a real concern.

24/7?

24/7. They attempt to stall as long as possible

Is this seriously a question? It’s very unlikely unless person A and person B has no life.

you'd be surprised how many people would be ready to do that

So, let them do that, that's still no real concern.
Neither of them gain anything, no other players are harmed.

I don't think the mentioned problem is really a problem, but there are some things to consider in a perfect world.

1. Some games are stalemates. Where one guy just constantly has to smash a territory and if he does something else, he loses. Same for the other guy, if he does something other than defending, he loses.
Now this is pretty rare so you could just disregard it, claiming the players have bad luck once in a while.

2. It's rt, and many people don't want to commit to playing for too long.


Solution: force finish as it is in the seasonal after 1 hour. However, this could technically also interrupt legit ongoing games and the players feel meh about it.

i mean have you tried staying up for 24 hours it isn't fun