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

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


创建mapping时将聚合字段改为keyword类型即可


  • 发表于 2018-10-12 15:14
  • 阅读 ( 150 )
  • 分类:大数据

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不写代码的码农
张鹏

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