请教一个关于es中文 聚合查询 Fielddata is disabled on text 出现的问题

Elasticsearch | 作者 a2615381 | 发布于2019年01月05日 | 阅读数:176

我有一个 类似group by的需求场景,  是吧一个  中文分词字段   进行去重,然后得到每个 有多少个
使用了AggregationBuilder 工具, 再对不分词字段,挺正常的,可以使用
但是使用在  中文分词字段则会报错,内容如下
{"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"Fielddata is disabled on text 
fields by default. Set fielddata=true on [name] in order to load fielddata in memory by uninverting the 
inverted index. Note that this can however use significant memory. Alternatively use a keyword field 
instead."}],"type":"search_phase_execution_exception","reason":"all shards failed","phase":"query",
"grouped":true,"failed_shards":[{"shard":0,"index":"school","node":"H7VIRoOwS8mws78T-0Ce-Q","reason":{
"type":"illegal_argument_exception","reason":"Fielddata is disabled on text fields by default. Set 
fielddata=true on [name] in order to load fielddata in memory by uninverting the inverted index.Note that
 this can however use significant memory. Alternatively use a keyword field instead."}}]},"status":400} 
 
 
查询资料发现是因为 分词问题,网上给出的解决办法是2个
1 ,这是region这个排序字段的fileddata为true。 但是这个方法很不推荐,会占用大量内存
2 ,查询时候增加  字段值 .keyword 。如下
AggregationBuilder aggregationBuilder = 
AggregationBuilders.terms("nameAgg").field("name.keyword").size(Integer.MAX_VALUE) //1
     .subAggregation(AggregationBuilders.terms("jobAgg").field("job.keyword").size(Integer.MAX_VALUE) //2
          .subAggregation(AggregationBuilders.avg("ageAgg").field("age")) //3
               .subAggregation(AggregationBuilders.count("totalNum").field("name.keyword"))); //4

searchSourceBuilder.aggregation(aggregationBuilder); 
 
但是我增加了 keyword之后发现,只是不报错了。但是值是空的, 请问怎么解决
已邀请:

rochy - rochy_he@jointsky

赞同来自: a2615381

请把 name 字段的 mapping 信息贴一下
匿名用户

匿名用户

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"mappings": {"modeldata": {
"properties": {
"brandName": {
"search_analyzer": "query_ansj",
"analyzer": "index_ansj",
"type": "text"
},
"color": {
"search_analyzer": "query_ansj",
"analyzer": "index_ansj",
"type": "text"
},
"typeFourId": {
"type": "integer"
},
"modelAttr": {
"index": false,
"type": "text"
},
"modelId": {
"type": "long"
},
"seriesName": {
"search_analyzer": "query_ansj",
"analyzer": "index_ansj",
"type": "text"
},
 
 
大概就是这样了

laoyang360 - [死磕Elasitcsearch]知识星球地址:http://t.cn/RmwM3N9;微信公众号:铭毅天下; 博客:blog.csdn.net/laoyang360

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如果你的keyword针对一很长的content,如网页正文内容,聚合肯定结果为空的。

a2615381

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自我解决问题,
修改 查询字段 mapping,增加多属性 keyword
 
curl -XPUT localhost:9200/my_index/my_type/_mapping -d '  
{  
    "my_type": {  
        "properties": {  
            "fName": {  
                "type": "text",
                "search_analyzer": "query_ansj",
                "analyzer": "index_ansj",
                "fields": {
                "raw": { 
                    "type":  "keyword"
                       }
                          }
                     }  
                      }  
                        }  
}'
 
查询代码 
SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder(); TermsAggregationBuilder aggHouse=AggregationBuilders.terms("modelNameAgg").field("fName.raw").size(10); searchSourceBuilder.aggregation(aggHouse); Search search = new Search.Builder(searchSourceBuilder.toString()).addIndex(es.getEsIndex()).addType(es.getEsType()).build(); SearchResult searchResult = js.execute(search); List<TermsAggregation.Entry> nameAgg = searchResult.getAggregations().getTermsAggregation("modelNameAgg").getBuckets();
 
 
但是仅限于 修改之后 增加的数据或者修改的数据,旧数据无法聚合,因为索引没有建立吧。也能理解,
重刷一遍数据就好了
 

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