client reset observe failed

in client side, i want to send RST packet to server.

req.on('response', function(res) {
  console.log("---------------------response---------------------");
  console.log(res.headers);

  var rcvCount = 5;
  res.on('data', function(data) {
    console.log(data);
    rcvCount--
    if(rcvCount == 0){
      //it will throw new Error: Empty messages must be empty
      req.reset();
    }
  });
})
req.end()

when i call req.reset(), it will throw Empty messages must be empty error