code: private static void possiblyFail(float chanceFailure, Random random) {
      float value = random.nextFloat();
      if (value < chanceFailure) {
        LOG.fatal("shouldFail: Failing with value " + value +
            " < " + chanceFailure);
        System.exit(-1);
      }
    }
docs: Should fail?
  @param chanceFailure Chances of failure [0.0,1.0]
  @param random Pseudo-random variable