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  • es进行聚合操作时提示Fielddata is disabled on text fields by default

    根据es官网的文档执行

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

     这个例子时,报错

    {
      "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."
          }
        ],
        "type": "search_phase_execution_exception",
        "reason": "all shards failed",
        "phase": "query",
        "grouped": true,
        "failed_shards": [
          {
            "shard": 0,
            "index": "megacorp",
            "node": "-Md3f007Q3G6HtdnkXoRiA",
            "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."
            }
          }
        ],
        "caused_by": {
          "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."
        }
      },
      "status": 400
    }
    

      

    搜了一下应该是5.x后对排序,聚合这些操作用单独的数据结构(fielddata)缓存到内存里了,需要单独开启,官方解释在此fielddata

    简单来说就是在聚合前执行如下操作

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

      

    转载:http://blog.csdn.net/u011403655/article/details/71107415

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  • 原文地址:https://www.cnblogs.com/royfans/p/8473201.html
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