Elasticsearch聚合问题

Posted 2022-08-02 liugp

 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