所以我終于設置了elasticsearch數據庫并將數據導入其中。有時當我嘗試從前端請求數據時，我會收到 500 錯誤（不是一直，只是有時）。我試圖從 POSTMAN 請求數據（以查看 ES 錯誤消息）。我有：{  "error": "SearchPhaseExecutionException[Failed to execute phase [query], all shards failed; shardFailures {[9m4uVcf3TLmQ9Kr7z_fSpQ][text][0]: QueryPhaseExecutionException[[text][0]: query[filtered(function score (blended(terms: [url_words:test, domain_words:test, title:test, body:test]), functions: [{filter(*:*), function [org.elasticsearch.common.lucene.search.function.FieldValueFactorFunction@56319fc9]}{filter(*:*), function [org.elasticsearch.common.lucene.search.function.FieldValueFactorFunction@60b46f02]}]))->cache(_type:page)],from[0],size[25]: Query Failed [Failed to execute main query]]; nested: ElasticsearchException[Missing value for field [lang_en]]; }{[9m4uVcf3TLmQ9Kr7z_fSpQ][text][1]: QueryPhaseExecutionException[[text][1]: query[filtered(function score (blended(terms: [url_words:test, domain_words:test, title:test, body:test]), functions: [{filter(*:*), function [org.elasticsearch.common.lucene.search.function.FieldValueFactorFunction@3ca7d41e]}{filter(*:*), function   "status": 500}這是請求正文：{      "query": {        "function_score": {          "query": {            "multi_match": {              "query": "test",              "minimum_should_match": "-25%",              "type": "cross_fields",                  "tie_breaker": 0.5,                  "fields": ["title^3", "body", "url_words^2", "domain_words^8"]            }          },          "functions": [{                "field_value_factor": {              "field": "rank",              "factor": 1            }        },{                        "field_value_factor": {                "field": "lang_en"            }                }]        }      },      "from": 0,      "size": 25    }我知道字段 [lang_en] 的缺失值是問題所在。我用谷歌結果玩弄了 es，但沒有成功。ES 版本：1.5.2有任何想法嗎 ？