code: protected static void printCaughtException(String exceptionMessage) {
          if (++countCaughtExceptions <= MAX_CAUGHT_EXCEPTION_MESSAGES) {
              System.out.println(exceptionMessage);
          }
          if (countCaughtExceptions == MAX_CAUGHT_EXCEPTION_MESSAGES) {
              System.out.println("In NonVoltDBBackend, reached limit of " + MAX_CAUGHT_EXCEPTION_MESSAGES
                      + " exception messages to be printed.");
          }
      }
docs: Print a message about an Exception that was caught; but limit the number
  of such print messages, so that the console is not swamped by them.