/**
    * String representation
    * 
    * @return The string
    */
   @Override
   public String toString() 
   {
      StringBuilder sb = new StringBuilder(); 
==>   sb.append("SemaphoreConcurrentLinkedQueueManagedConnectionPool@");
      sb.append(Integer.toHexString(System.identityHashCode(this)));
      sb.append("[pool=").append(pool.getName());
      sb.append("]");      return sb.toString();
   }