java es报错：Fielddata is disabled on text fields by default. Set fielddata=true on [serviceId] in orde

Elasticsearch聚合操作异常：

Fielddata is disabled on text fields by default. Set fielddata=true on [serviceId] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory.

fielddate官方解释https://www.elastic.co/guide/en/elasticsearch/reference/current/fielddata.html#fielddata

解决办法

1. 修改字段类型为keyword (建议)
2. 修改字段属性，使用该my_field.keyword字段进行聚合，排序或脚本

PUT my_index 
{ 
  “mappings”：{ 
    “my_type”：{ 
      “properties”：{ 
        “my_field”：{
          “type”：“text”，
          “fields”：{ 
            “keyword”：{
              “type”：“keyword” 
            } 
          } 
        } 
      } 
    } 
  } 
}

java api

String index = "people";
String type = "man";
SearchRequestBuilder searchRequestBuilder = client.prepareSearch(index).setTypes(type);
TermsAggregationBuilder field = AggregationBuilders.terms("my_type123").field("my_type.keyword");
searchRequestBuilder.addAggregation(field);
searchRequestBuilder.setSize(0);
SearchResponse searchResponse = searchRequestBuilder.execute().actionGet();
System.out.println(searchResponse.toString());

参考

https://blog.youkuaiyun.com/wwd0501/article/details/78490201
http://www.belonk.com/c/elasticsearch_error_fielddata_is_disabled.html
https://www.elastic.co/guide/en/elasticsearch/reference/current/fielddata.html#fielddata