Elasticsearch 5.x.x cannot disable dynamic mapping

Question

I'm trying to simply disable dynamic mapping for any fields not explicitly defined in the mapping at index creation time. Nothing would work, so I even tried the example in their docs

PUT my_index
{
  "mappings": {
    "my_type": {
      "dynamic": false,
      "properties": {
        "user": {
          "type": "text"
        }
      }
    }
  }
}

Made a test insert:

POST my_index/my_type
{
  "user": "tester",
  "some_unknown_field": "lsdkfjsd"
}

Then searching the index shows:

{
  "took": 1,
  "timed_out": false,
  "_shards": {
    "total": 5,
    "successful": 5,
    "failed": 0
  },
  "hits": {
    "total": 1,
    "max_score": 1,
    "hits": [
      {
        "_index": "my_index",
        "_type": "my_type",
        "_id": "AViPrfwVko8c8Q3co8Qz",
        "_score": 1,
        "_source": {
          "user": "tester",
          "some_unknown_field": "lsdkfjsd"
        }
      }
    ]
  }
}

I'm expecting "some_unknown_field" to not be indexed, since it was not defined in the mapping. So why is it still being indexed? Am I missing something?

UPDATE

It turns out that it isn't currently possible in version 5.0.0 to do what I wanted, so I removed the fields in my app before sending to elasticsearch and achieved the same end result.

Kulasangar Kulasangar · Accepted Answer · 2016-11-23T06:40:08

What mapping does is to have your field as the type which you mention, when you create the index using the mapping. So for a field which you haven't mentioned anything during the mapping and then trying to insert values, ES will always consider it as a new field and will add it to the index with a default mapping. So if you don't want to see a particular field within your _source you could do some source filtering.

Work arounds:

If that's not the case try disabling the default mapping when you're creating the index.

Try making the property dynamic into strict:

PUT /test
    {
      "settings": {
        "index.mapper.dynamic": false
      },
      "mappings": {
        "testing_type": {
          "dynamic":"strict",
          "properties": {
            "field1": {
              "type": "string"
            }
          }
        }
      }
    }

If the above two doesn't work out, try making index_mapper_dynamicto false. This SO could be handy. Hope it helps.

Elasticsearch 5.x.x cannot disable dynamic mapping

1 Answers