Well, it so popular that PS4 users are seeing errors that "Matchmaking Failed – Could not find a server to join". It is not that there is a problem with the network play, the issue is that the PlayStation 4 servers for Hardline are at max capacity and there currently are no free slots.

What EA says about the issue is a little interesting. They apparently have limited the number of players per platform in order to stress-test the platform. In other words, they are trying to determine how many players each server is able to support. EA says that the PS4 Hardline players peeked with over 132287 players in the last 24 hour period. That is impressive for a beta.

EA says that they are working on keeping up with the demand and adding more capacity as they are able. The good news for EA is that it would seem there is a lot of interest in Hardline which could indicate sales boon for the game.