code: public Result readHashcodeByRange(int index, int length, boolean debug, boolean useValue) { // LI4337-17
          Result result = this.htod.readHashcodeByRange(index, length, debug, useValue);
          if (result.returnCode == HTODDynacache.DISK_EXCEPTION) {
              stopOnError(result.diskException);
          }
          return result;
      }
docs: This method find the hashcode based on index and length.
  
  @param index
  If index = 0, it starts the beginning. If index = 1, it means "next". If Index = -1, it means
  "previous".
  @param length
  The max number of cache ids to be read. If length = -1, it reads all cache ids until the end.
  @param debug
  true to output id and its hashcode to systemout.log
  @param useValue
  true to calculate hashcode including value