java - Elasticsearch Java API 迁移到TermsFacetBuilder 和AggregationBuilders

Question

我正在从 ES 1.7 迁移到 5.2 并重构以下代码。

ES 1.7

public void prepare(final SearchRequestBuilder searchRequestBuilder) {
        final TermsFacetBuilder labelsFacet = FacetBuilders
                .termsFacet("labels")
                .field("labels");
        searchRequestBuilder.addFacet(labelsFacet);
        searchRequestBuilder.setFrom(start);
        searchRequestBuilder.setSize(size);
    }

使用 ES 5.2

 public void prepare(final SearchRequestBuilder searchRequestBuilder) {
        TermsAggregationBuilder aggregation = AggregationBuilders.terms("labels").field("labels");
        searchRequestBuilder.addAggregation(aggregation);
        searchRequestBuilder.setFrom(start);
        searchRequestBuilder.setSize(size);
    }

当我触发搜索查询时，出现以下异常

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

我还尝试在 SearchRequestBuilder 上设置 fieldDocValue 但没有成功。

Answer 1

根据错误消息，您需要enable fielddata在您的映射中。

例如，以下是在 text 字段上使用 fielddata=true 的新映射。

PUT my_index/_mapping/my_type
{
  "properties": {
    "my_field": { 
      "type":     "text",
      "fielddata": true
    }
  }
}