}

    @Override
    public void tearDown() throws Exception {
        if (indexUpdater != null && indexUpdater.isAlive()) {
            indexUpdater.setFinishCrawling(true);
            indexUpdater.interrupt();
            indexUpdater.join(1000);
        }
        super.tearDown();
    }

    // Test initialization
    public void test_init() {
        indexUpdater.init();

            }

            @Override
            public void destroy() {
                // Override to avoid null pointer issues with thread
                generating = false;
                // Don't need to interrupt thread since we never start it in tests
            }
        };
        manager.init();
        assertTrue(manager.baseDir.exists());
        manager.destroy();
    }

    // Test initialization failure

            task.start();
            task.join(timeout);
            if (!done.get()) {
                for (int i = 0; i < 100 && !done.get(); i++) {
                    task.interrupt();
                    ThreadUtil.sleep(100L);
                }
                throw new ExtractException("PDFBox process cannot finish in " + timeout + " sec.");
            }

                        assertTrue(pwd == null || pwd.equals("ConcurrentPass123!"));
                    }
                } catch (InterruptedException e) {
                    Thread.currentThread().interrupt();
                }
            });
        }

        // Start all threads
        for (Thread t : threads) {
            t.start();
        }

        // Wait for all threads to complete

    AtomicBoolean terminated = new AtomicBoolean();
    // we need to keep this in a flag because t.isInterrupted() returns false after t.join()
    AtomicBoolean interrupted = new AtomicBoolean();
    // we need to use another thread because it will be interrupted and thus using
    // the current one, owned by JUnit, would make the test fail
    Thread thread =
        new Thread(
            new Runnable() {

#   destroys some temporary bazel data and causes longer builds.
#
#   You will need the NVIDIA Container Toolkit for GPU testing:
#   https://github.com/NVIDIA/nvidia-container-toolkit
#
#   Note: if you interrupt a bazel command on docker (ctrl-c), you
#   will need to run `docker exec tf pkill bazel` to quit bazel.
#
#   Note: new files created from the container are owned by "root".

                            }
                        });
                        successCount.incrementAndGet();
                    } catch (InterruptedException e) {
                        Thread.currentThread().interrupt();
                    } catch (CIFSException e) {
                        if (e.getMessage().contains("backpressure")) {
                            rejectedCount.incrementAndGet();
                        }

            throw new CrawlerSystemException("Process terminated.", e);
        } finally {
            if (mt != null) {
                mt.setFinished(true);
                try {
                    mt.interrupt();
                } catch (final Exception e) {}
            }
            if (currentProcess != null) {
                try {
                    currentProcess.destroy();

                }
            }).start();
        }

        try {
            latch.await();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();
            fail("Thread safety test interrupted");
        }

        // In test environment, some operations might not work due to missing request context
        // but the methods should not throw unexpected exceptions
    }

            } catch (InterruptedException ex) {
              interrupted = true; // note interruption and retry
            }
          }
          if (e == null) {
            break; // we already waited enough, and there are no more elements in sight
          }
          buffer.add(e);
          added++;
        }
      }
    } finally {
      if (interrupted) {
        Thread.currentThread().interrupt();
      }