ES聚合查询报错：Fielddata is disabled on text fields by default. Set fielddata=true

ES聚查询报错：Fielddata is disabled on text fields by default. Set fielddata=true

1.原代码

//以品牌分组，求组内情况
    @Test
    public void testBucket(){
        NativeSearchQueryBuilder queryBuilder = new NativeSearchQueryBuilder();
        queryBuilder.addAggregation(AggregationBuilders.terms("brandsName").field("brand"));
        Page<Item> page = itemRepository.search(queryBuilder.build());
        AggregatedPage<Item> aggregatedPage = (AggregatedPage<Item>) page;
        Aggregation aggregation = aggregatedPage.getAggregation("brandsName");
        StringTerms st = (StringTerms) aggregation;

        List<StringTerms.Bucket> buckets = st.getBuckets();
        for (StringTerms.Bucket sb : buckets) {
            System.out.println(sb.getKeyAsString()+":"+sb.getDocCount());
        }
    }

2.解决在查询的brand加.keyword ；如图所示
3.原因：Fielddata在text默认编辑的字段上被禁用 ；官方做了解释官方文档