Elastic Fielddata is disabled on

es5.0 以后默认禁用了fielddata
解决方案:

• 用.keyword

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

• 在聚合指令前先发送开始fielddata指令

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