@Override
      public boolean isAcceptableAddress(InetAddress addr) {
        return addr instanceof Inet6Address;
      }
Parse the port portion of a host-and-port string
@param hostAndPort Formatted as <code>&lt;hostname&gt; ':' &lt;port&gt;</code>
@return The port portion of <code>hostAndPort</code>
hbase-common/src/main/java/org/apache/hadoop/hbase/util/Addressing.java