public virtual void TestIntermediateClose()
        {
            Directory dir = NewDirectory();
            // Test can deadlock if we use SMS:
            IConcurrentMergeScheduler scheduler;

#if !FEATURE_CONCURRENTMERGESCHEDULER
            scheduler = new TaskMergeScheduler();
#else
            scheduler = new ConcurrentMergeScheduler();
#endif
            IndexWriter writer = new IndexWriter(dir, NewIndexWriterConfig(TEST_VERSION_CURRENT, new MockAnalyzer(Random())).SetMergeScheduler(scheduler));
            writer.AddDocument(new Document());
            writer.Commit();
            CountdownEvent awaitEnterWarm = new CountdownEvent(1);
            CountdownEvent awaitClose     = new CountdownEvent(1);
            AtomicBoolean  triedReopen    = new AtomicBoolean(false);
            //TaskScheduler es = Random().NextBoolean() ? null : Executors.newCachedThreadPool(new NamedThreadFactory("testIntermediateClose"));
            TaskScheduler   es              = Random().NextBoolean() ? null : TaskScheduler.Default;
            SearcherFactory factory         = new SearcherFactoryAnonymousInnerClassHelper2(this, awaitEnterWarm, awaitClose, triedReopen, es);
            SearcherManager searcherManager = Random().NextBoolean() ? new SearcherManager(dir, factory) : new SearcherManager(writer, Random().NextBoolean(), factory);
            if (VERBOSE)
            {
                Console.WriteLine("sm created");
            }
            IndexSearcher searcher = searcherManager.Acquire();
            try
            {
                assertEquals(1, searcher.IndexReader.NumDocs);
            }
            finally
            {
                searcherManager.Release(searcher);
            }
            writer.AddDocument(new Document());
            writer.Commit();
            AtomicBoolean success = new AtomicBoolean(false);
            Exception[]   exc     = new Exception[1];
            ThreadClass   thread  = new ThreadClass(() => new RunnableAnonymousInnerClassHelper(this, triedReopen, searcherManager, success, exc).Run());
            thread.Start();
            if (VERBOSE)
            {
                Console.WriteLine("THREAD started");
            }
            awaitEnterWarm.Wait();
            if (VERBOSE)
            {
                Console.WriteLine("NOW call close");
            }
            searcherManager.Dispose();
            awaitClose.Signal();
            thread.Join();
            try
            {
                searcherManager.Acquire();
                fail("already closed");
            }
#pragma warning disable 168
            catch (ObjectDisposedException ex)
#pragma warning restore 168
            {
                // expected
            }
            assertFalse(success.Get());
            assertTrue(triedReopen.Get());
            assertNull("" + exc[0], exc[0]);
            writer.Dispose();
            dir.Dispose();
            //if (es != null)
            //{
            //    es.shutdown();
            //    es.awaitTermination(1, TimeUnit.SECONDS);
            //}
        }