ElasticSearch 5.6 不接受“_doc”映射类型名称

Question

我正在查看 ElasticSearch 5.6 上的单一类型索引示例，为删除映射类型做准备。具体来说，我是运行来自 ElasticSearch page about the removal of types 的第一个示例，在 Docker 本地的新集群运行上使用 docker.elastic.co/elasticsearch/elasticsearch:5.6.5 图像

运行我链接到的部分的第一个示例：

PUT localhost:9200/users
{
  "settings": {
    "index.mapping.single_type": true
  },
  "mappings": {
    "_doc": {
      "properties": {
        "name": {
          "type": "text"
        },
        "user_name": {
          "type": "keyword"
        },
        "email": {
          "type": "keyword"
        }
      }
    }
  }
}

我收到以下错误：

{
  "error": {
    "root_cause": [
      {
        "type": "invalid_type_name_exception",
        "reason": "mapping type name [_doc] can't start with '_'"
      }
    ],
    "type": "invalid_type_name_exception",
    "reason": "mapping type name [_doc] can't start with '_'"
  },
  "status": 400
}

我知道名称中带有前导下划线的字段通常被认为是为 ES 内部保留的；但我假设 _doc 将被视为从版本 5.6 开始的特例，因为链接指南提到：

Indices created in 6.x only allow a single-type per index. Any name can be used for the type, but there can be only one. The preferred type name is _doc so that index APIs have the same path as they will have in 7.0

我是不是遗漏了什么，比如集群设置？

Answer 1

我链接的文档是master版本。在同一文档的 6.1 或 5.6 版本中，没有提到 _doc 是首选名称；这可能意味着使用 _doc 作为映射类型名称的能力将在未来的 6.x 版本中出现。

Answer 2

我在主分支 https://github.com/elastic/elasticsearch/tree/master 的自述文件中尝试示例时遇到了同样的问题。

$ curl -XPUT 'elastic:@localhost:9200/twitter/_doc/1?pretty' -H 'Content-Type: application/json' -d '
{
    "user": "kimchy",
    "post_date": "2009-11-15T13:12:00",
    "message": "Trying out Elasticsearch, so far so good?"
}'
{
  "error" : {
    "root_cause" : [
      {
        "type" : "invalid_type_name_exception",
        "reason" : "Document mapping type name can't start with '_', found: [_doc]"
      }
    ],
    "type" : "invalid_type_name_exception",
    "reason" : "Document mapping type name can't start with '_', found: [_doc]"
  },
  "status" : 400
}

只需检查版本 5.6https://github.com/elastic/elasticsearch/tree/5.6 的分支，看起来一切正常。

$ curl -XPUT 'http://localhost:9200/twitter/user/kimchy?pretty' -H 'Content-Type: application/json' -d '{ "name" : "Shay Banon" }'
{
  "_index" : "twitter",
  "_type" : "user",
  "_id" : "kimchy",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "created" : true
}

ElasticSearch 5.6 不接受“_doc”映射类型名称

"_doc" mapping type name not accepted in ElasticSearch 5.6

elasticsearch

elasticsearch-5