indexUpdater.setUncaughtExceptionHandler((t, e) -> caughtException.set(e));

        // Make dataService throw ContainerNotAvailableException
        ((TestDataService) dataService).setThrowContainerNotAvailable(true);

        indexUpdater.start();
        indexUpdater.join(1000);

        assertNull(caughtException.get());
        // Thread may still be alive in test environment