// Test executeTime
        assertEquals(0L, indexUpdater.getExecuteTime());

        // Test documentSize
        assertEquals(0L, indexUpdater.getDocumentSize());
    }

    // Test setUncaughtExceptionHandler
    @Test
    public void test_setUncaughtExceptionHandler() {
        final AtomicBoolean handlerCalled = new AtomicBoolean(false);

        crawlingInfoHelper.putToInfoMap(Constants.WEB_FS_INDEX_EXEC_TIME, Long.toString(indexUpdater.getExecuteTime()));
        crawlingInfoHelper.putToInfoMap(Constants.WEB_FS_INDEX_SIZE, Long.toString(indexUpdater.getDocumentSize()));

        if (systemHelper.isForceStop()) {
            return;
        }

        for (final String sid : sessionIdList) {
            // remove config