(转载)es进行聚合操作时提示Fielddata is disabled on text fields by default
2024-09-03 08:27:54
原文地址：http://blog.csdn.net/u011403655/article/details/71107415
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(https://www.elastic.co/guide/en/elasticsearch/reference/current/fielddata.html)
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
}
}
}
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