ES进行如下聚合操作时，会报如题所示错误：
1 ➜ Downloads curl -XPOST 'localhost:9200/bank/_search?pretty' -d ' 2 { 3 "size": 0, 4 "aggs": { 5 "group_by_state": { 6 "terms": { 7 "field": "state" 8 } 9 } 10 } 11 }'
Fielddata is disabled on text fields by default. Set fielddata=true on [gender] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memor
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