Elasticsearch聚合java查询问题

╰+哭是因爲堅強的太久メ 2023-01-10 10:13 231阅读 0赞

**在测试Elasticsearch聚合的时候报了一个错误。具体如下：**

GET /megacorp/employee/_search
    {
      "aggs": {
        "all_interests": {
          "terms": { "field": "interests" }
        }
      }
    }

报错信息：

{
      "error": {
        "root_cause": [
          {
            "type": "illegal_argument_exception",
            "reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [interests] 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": "megacorp",
            "node": "wlvuJ0f_SsCxys6ZW5j7eA",
            "reason": {
              "type": "illegal_argument_exception",
              "reason": "Fielddata is disabled on text fields by default. Set fielddata=true on [interests] 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
    }

**解决方案：**

1、**ElasticSearch5.x**的解决方法是这样开启fielddata的：

PUT /megacorp/_mapping/employee
    {
      "properties": {
        "interests": { 
          "type": "text",
          "fielddata": true
        }
      }
    }

2、版本为**ElasticSearch6.x**或者**7.x**时开启fielddata的：

PUT /megacorp/_mapping
    {
      "properties": {
        "interests": { 
          "type": "text",
          "fielddata": true
        }
      }
    }

转载来自：《[Elasticsearch聚合问题][Elasticsearch]》

[Elasticsearch]: https://www.cnblogs.com/liugp/p/11374524.html