Question content:

{
    "error": {
        "root_cause": [
            {
                "type": "mapper_parsing_exception",
                "reason": "Root mapping definition has unsupported parameters:  [article : {properties={id={index=not_analyzed, store=true, type=long}, title={analyzer=standard, index=analyzed, store=true, type=text}, content={analyzer=standard, index=analyzed, store=true, type=text}}}]"
            }
        ],
        "type": "mapper_parsing_exception",
        "reason": "Failed to parse mapping [_doc]: Root mapping definition has unsupported parameters:  [article : {properties={id={index=not_analyzed, store=true, type=long}, title={analyzer=standard, index=analyzed, store=true, type=text}, content={analyzer=standard, index=analyzed, store=true, type=text}}}]",
        "caused_by": {
            "type": "mapper_parsing_exception",
            "reason": "Root mapping definition has unsupported parameters:  [article : {properties={id={index=not_analyzed, store=true, type=long}, title={analyzer=standard, index=analyzed, store=true, type=text}, content={analyzer=standard, index=analyzed, store=true, type=text}}}]"
        }
    },
    "status": 400
}

Wrong configuration

{
  "mappings": {
    "article": {
      "properties": {
        "id": {
          "type": "long",
          "store": true,
          "index":"not_analyzed"
        },
        "title": {
          "type": "text",
          "store": true,
          "index":"analyzed",
          "analyzer":"standard"
        },
        "content": {
          "type": "text",
          "store": true,
          "index":"analyzed",
          "analyzer":"standard"
        } 
      }
    } 
  }
}

Modify configuration

{
  "mappings": {
      "properties": {
        "id": {
          "type": "long",
          "store": true
        },
        "title": {
          "type": "text",
          "store": true,
          "analyzer":"standard"
        },
        "content": {
          "type": "text",
          "store": true,
          "analyzer":"standard"
        } 
      }
  }
}

Cause of problem: ES7 adjustment for configuration