DirectoryCacheEntry entry = directoryLeaseManager.getCacheEntry(directoryPath);

        // Test concurrent updates
        Thread[] updateThreads = new Thread[5];
        for (int i = 0; i < updateThreads.length; i++) {
            final int threadId = i;
            updateThreads[i] = new Thread(() -> {
                for (int j = 0; j < 20; j++) {
                    String fileName = "thread" + threadId + "_file" + j + ".txt";