code: protected int getRetryInterval() throws ActivityException {
          try {
              String v = getAttributeValueSmart(PROP_RETRY_INTERVAL);
              return StringHelper.getInteger(v, 600);
          }
          catch (PropertyException ex) {
              throw new ActivityException(ex.getMessage(), ex);
          }
      }
docs: This is only used by activities, not connection pools
  @return