@Override
    public int reservePort() {
        return getCommunicator().getPort();
    }

    private FileLockCommunicator getCommunicator() {
        lock.lock();
        try {
            assertNotStopped();
            if (communicator == null) {
                communicator = new FileLockCommunicator(inetAddressProvider);
            }
            return communicator;
        } finally {