private void findPingDataMethod() {
    transport = getProtocolStack().getTransport();
    try {
      setPingData = TP.class.getDeclaredMethod("setPingData", PingData.class);
      setPingData.setAccessible(true);
    } catch (NoSuchMethodException e) {
      if (!warningLogged) {
        log.warn("Unable to update JGroups address cache - this may affect performance", e);
        warningLogged = true;
      }
    }
  }
find and initialize the method used to update UDP's address cache
geode-membership/src/main/java/org/apache/geode/distributed/internal/membership/gms/messenger/AddressManager.java