try {
                    fesenClient.addOnConnectListener(() -> callbackCount.incrementAndGet());
                } finally {
                    latch.countDown();
                }
            });
        }

        latch.await(5, TimeUnit.SECONDS);
        executor.shutdown();

        // Verify all listeners were added
        assertEquals(numThreads, fesenClient.onConnectListenerList.size());

                        }
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                } finally {
                    latch.countDown();
                }
            });
        }

        // Then
        assertTrue(latch.await(10, TimeUnit.SECONDS));
        executor.shutdown();

    private final CountDownLatch latch = new CountDownLatch(1);
    private final String name;

    TestCloseable(String name) {
      this.name = name;
    }

    @Override
    public void close() throws IOException {
      latch.countDown();
    }

    boolean awaitClosed() {
      return awaitUninterruptibly(latch, 10, SECONDS);
    }

    boolean stillOpen() {

                            successCount.incrementAndGet();
                        } catch (Exception e) {
                            failureCount.incrementAndGet();
                        }
                    }
                } finally {
                    latch.countDown();
                }
            });
        }

        assertTrue(latch.await(10, TimeUnit.SECONDS), "Concurrent operations should complete");

          public void failed(State from, Throwable failure) {
            assertEquals(State.RUNNING, from);
            assertEquals(error, failure);
            latch.countDown();
          }
        },
        directExecutor());
    service.startAsync();
    latch.await();

    assertEquals(0, service.numberOfTimesRunCalled.get());
    assertEquals(Service.State.FAILED, service.state());
  }

          public void failed(State from, Throwable failure) {
            assertEquals(State.RUNNING, from);
            assertEquals(error, failure);
            latch.countDown();
          }
        },
        directExecutor());
    service.startAsync();
    latch.await();

    assertEquals(0, service.numberOfTimesRunCalled.get());
    assertEquals(Service.State.FAILED, service.state());
  }

                // Set alive to false very early - no delay
                dataStore.alive = false;
            } catch (InterruptedException e) {
                Thread.currentThread().interrupt();
            }
        });
        writerThread.start();

        // Give threads a moment to reach the latch
        Thread.sleep(50);

        // Release all threads to start simultaneously
        startLatch.countDown();

    )
    server.enqueue(MockResponse(body = "ABC"))
    val latch = CountDownLatch(1)
    val responses: BlockingQueue<String?> = SynchronousQueue()
    val authenticator =
      okhttp3.Authenticator { route: Route?, response: Response? ->
        responses.offer(response!!.body.string())
        try {
          latch.await()
        } catch (e: InterruptedException) {
          throw AssertionError()
        }

                            } catch (GeneralSecurityException e) {
                                // Ignore in concurrent test
                            }
                        }
                    }
                } finally {
                    latch.countDown();
                }
            });
        }

        assertTrue(latch.await(10, TimeUnit.SECONDS), "Concurrent ops should complete");

                    WebApiUtil.validate();
                } catch (Exception e) {
                    errorCount.incrementAndGet();
                } finally {
                    latch.countDown();
                }
            }).start();
        }

        try {
            latch.await();
        } catch (InterruptedException e) {
            Thread.currentThread().interrupt();