let buddyAdded = false;
replicaArr = _.keys(ReplicaList);
Promise.each(replicaArr, function(replicaname) {
  if (!buddyAdded) {
    Player.count({
      'buddyList': replicaname
    }, function(err, result) {
      if (err) {

      } else if (result < 990) {

        Player.update({
          '_id': buddyObj.buddyId
        }, {
          'buddyList': replicaname
        }, function(err) {
          if (err) {

          } else {
            ReplicaList[replicaname].send(buddyObj);
            buddyAdded = true;
            // success stop here and skip all the other  array elements
            return;
          }
        });
      }
    });
  }
});