factory.newConnection(pool, routeA1)
    // Racy causing flaky tests
    // assertThat(taskRunner.activeQueues()).isNotEmpty()
    assertThat(taskRunnerThreads).isNotEmpty()
    Thread.sleep(100)
    for (t in taskRunnerThreads) {
      t.interrupt()
    }
    Thread.sleep(100)
    assertThat(taskRunner.activeQueues()).isEmpty()
  }

  /** Use a helper method so there's no hidden reference remaining on the stack.  */

      }
    }
  }

  private fun ensureAllTaskQueuesIdle() {
    val entryTime = System.nanoTime()

    for (queue in TaskRunner.INSTANCE.activeQueues()) {
      // We wait at most 1 second, so we don't ever turn multiple lost threads into
      // a test timeout failure.
      val waitTime = (entryTime + 1_000_000_000L - System.nanoTime())