### Question:
LockManager { public DNLock tryWriteLockEntry(final DN entry) { return acquireLockFromCache(entry).tryWriteLockEntry(); } LockManager();  LockManager(final long lockTimeout, final TimeUnit lockTimeoutUnit); @SuppressWarnings("unchecked")  LockManager(final long lockTimeout, final TimeUnit lockTimeoutUnit, final int numberOfBuckets); @Override String toString(); DNLock tryReadLockEntry(final DN entry); DNLock tryWriteLockEntry(final DN entry); DNLock tryWriteLockSubtree(final DN subtree);  }### Answer:
@Test(description = "OPENDJ-1984") public void stressTestForDeadlocks() throws Exception { final LockManager lockManager = new LockManager(); final int threadCount = Runtime.getRuntime().availableProcessors(); final ExecutorService threadPool = Executors.newFixedThreadPool(threadCount); for (int i = 0; i < threadCount; i++) { threadPool.submit(new Runnable() { @Override public void run() { final Random rng = new Random(); for (int j = 0; j < 1000000; j++) { try { final int uid = rng.nextInt(); final int deviceId = rng.nextInt(); final DN dn = DN.valueOf("uid=" + deviceId + ",uid=" + uid + ",dc=example,dc=com"); lockManager.tryWriteLockEntry(dn).unlock(); } catch (DirectoryException e) { throw new RuntimeException(e); } } } }); } threadPool.shutdown(); assertThat(threadPool.awaitTermination(60, TimeUnit.SECONDS)).as("Deadlock detected during stress test").isTrue(); }