code: public void removeHostName(String hostName) {
  		if(logger.isDebugEnabled()) {
  			logger.debug("Removing hostname "+ hostName);
  		}
  		hostNames.remove(hostName);
  		if(dnsServerLocator != null) {
  			dnsServerLocator.removeLocalHostName(hostName);
  		}
  	}
docs: /*
  (non-Javadoc)
  @see org.mobicents.servlet.sip.core.SipApplicationDispatcher#removeHostName(java.lang.String)