Message Title

For info this is how you can add a new analyzer to an index. It does require to close the index (making it unavailable temporarily)

 
                                                                DELETE test
PUT test
{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_analyzer": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase"
          ]
        }
      }
    }
  }
}
POST test/_close
PUT test/_settings
{
  "settings": {
    "analysis": {
      "analyzer": {
        "my_analyzer2": {
          "type": "custom",
          "tokenizer": "standard",
          "filter": [
            "lowercase"
          ]
        }
      }
    }
  }
}
POST test/_open
GET test/_settings
 
                                                            

Note that one can change the mapping without stopping the index as long as you don't change an existing field. In other words, adding fields is fine without stopping the index.

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