@Override
	public String getHostByAddr(byte[] ip) throws UnknownHostException {
		String hostName = instance.getReveredHost(InetAddress.getByAddress(ip));
		if (hostName == null) {
			return defaultDnsImpl.getHostByAddr(ip);
		} else {
			return hostName;
		}
	}
Get host name by address.

@param ip ip
@return host name
@throws UnknownHostException occurs when hostname can not be found.
ngrinder-runtime/src/main/java/org/ngrinder/dns/LocalManagedDnsProxy.java