public static void clearDnsCache(){
  try {
    InetAddressCacheUtil.clearInetAddressCache();
  }
 catch (  Exception e) {
    throw new DnsCacheManipulatorException("Fail to clearDnsCache, cause: " + e.toString(),e);
  }
}

public static void clearDnsCache ( ) { try { InetAddressCacheUtil . clearInetAddressCache ( ) ; } catch ( Exception e ) { throw new DnsCacheManipulatorException ( "Fail to clearDnsCache, cause: " + e . toString ( ) , e ) ; } }
clear all dns cache entries , cause lookup dns server for all host after .
