Interrupted iterations if I don't close the socket

I have a test with lot of socket connections (50K) and I intensionally want to keep the socket connection because my systeam broadcast messages and I need to test the load of that broadcast over 50k connected “users”… The problem is that not clossing the connection, the result is:

running (5m30.9s), 00000/50000 VUs, 0 complete and 50000 interrupted iterations

I tried with teardown but I couldn’t close the sockets from there…

This is my scenario:

scenario_50000_5_mins_users: {
    executor: "constant-arrival-rate",
    rate: 167,
    timeUnit: "1s",
    duration: "5m",
    preAllocatedVUs: 50000,
    maxVUs: 50000,
    gracefulStop: "30s",
  },

and clossing the socket on message works fine:

socket.on("message", (message) => {
        let json_message = JSON.parse(message);
        if (json_message[3] === "phx_reply") {
          checkSocketResponse(json_message);
        }
        console.log(socket);
        socket.close();
      });

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