valueSet.add(source.get("field1").toString());
            count++;
        }
        assertTrue(String.valueOf(count), count < 200);
    }

    @Test
    public void test_ReadMultiThread() throws Exception {
        int threadNum = new Random().nextInt(20) + 1;
        System.out.println("Thread num:" + threadNum);

        String indexName = "test-index";
        Client client = runner.client();