final Thread[] threads = new Thread[threadCount];
        final Exception[] exceptions = new Exception[threadCount];
        final int[] sizes = new int[threadCount];
        final boolean[][] containsResults = new boolean[threadCount][10];

        // Multiple threads read from deleteUrlList
        for (int i = 0; i < threadCount; i++) {
            final int threadIndex = i;
            threads[i] = new Thread(() -> {