ElasticSearch映射报错：Root mapping含不支持参数求助

问题根源 #

1. 接口使用错误：你调用的_mapping接口仅用于修改索引映射，无法添加或修改settings（自定义分析器属于索引设置，必须在创建索引时指定）。
2. 类型参数无效：ElasticSearch 7及以上版本已移除索引类型（type），URL中的article类型参数不符合当前版本规范。

修正后的操作步骤 #

1. 删除旧索引（若存在）

curl -XDELETE http://localhost:9200/articles

2. 创建带自定义分析器的索引

使用PUT /articles直接创建索引，同时定义settings和mappings：

curl -H "Content-Type: application/json" -XPUT http://localhost:9200/articles -d '{
  "settings": {
    "analysis": {
      "analyzer": {
        "content_tokenizer": {
          "type": "standard",
          "tokenizer": "standard"
        },
        "content_case_folding": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase"
          ]
        },
        "content_stopword_removal": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "stop"
          ]
        },
        "content_ngram_extraction": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "stop",
            "ngram"
          ]
        },
        "content_stemmer": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase",
            "stop",
            "ngram",
            "stemmer"
          ]
        }
      },
      "filter": {
        "ngram": {
          "type": "ngram",
          "min_gram": 2,
          "max_gram": 5
        },
        "stop": {
          "type": "stop",
          "stopwords": "_english_"
        },
        "stemmer": {
          "type": "stemmer",
          "language": "english"
        }
      }
    }
  },
  "mappings": {
    "properties": {
      "content": {
        "type": "text",
        "fields": {
          "tokenized": {
            "type": "text",
            "analyzer": "content_tokenizer"
          },
          "case_folded": {
            "type": "text",
            "analyzer": "content_case_folding"
          },
          "without_stopwords": {
            "type": "text",
            "analyzer": "content_stopword_removal"
          },
          "ngrammed": {
            "type": "text",
            "analyzer": "content_ngram_extraction"
          },
          "stemmed": {
            "type": "text",
            "analyzer": "content_stemmer"
          }
        }
      }
    }
  }
}'

验证分析器 #

创建索引后，可通过_analyze接口测试自定义分析器是否正常工作：

curl -H "Content-Type: application/json" -XPOST http://localhost:9200/articles/_analyze -d '{
  "analyzer": "content_stemmer",
  "text": "Hello world! This is a test of the stemmer filter."
}'

内容的提问来源于stack exchange，提问作者Dee. Salako