unknown setting [index.similarity]

I recently upgraded to elasticsearch 5.0 and am trying to get things working on a code that worked fine with elasticsearch 2.x, I’m trying to track down the problem… The elasticsearch.js code where the error is thrown looks like this

client.indices.create({
  index: indexName,
  body: {
    settings: { 
      number_of_shards: 1,
      similarity :  "norm_bm25"
    } 
  },
  ... error stuff

Also, I’m trying to set the default index settings using

curl -XPUT 'http://localhost:9200/_template/template1' -d '{
  "template" : "*",  
  "settings.number_of_replicas" : "1",
  "settings.number_of_shards" : "1",
  "settings.similarity.default.type" : "BM25",
  "settings.similarity.default.b" : "0.0",
  "settings.similarity.default.k1" : "1.2",
  "settings.similarity.norm_bm25.type" : "BM25",
  "settings.similarity.norm_bm25.b" : "0.75",
  "settings.similarity.norm_bm25.k1" : "1.2"
}'

These values were set in the elasticsearch.yml in elasticsearch 2.x (but you can no longer do that in elasticsearch 5.0)

The error I receive is

{
  "error": {
    "root_cause": [
      {
        "type": "illegal_argument_exception",
        "reason": "unknown setting [index.similarity] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "unknown setting [index.similarity] please check that any required plugins are installed, or check the breaking changes documentation for removed settings"
  },
  "status": 400
}

Any ideas as to why this is happening? I don’t seem to be able to find the documentation about how to set similarity in an index template, or how to do it in indices.create…

Thanks for any help.

[bayological]

@jloveric the similarity setting has been renamed to classic. [See here] (https://www.elastic.co/guide/en/elasticsearch/reference/5.0/breaking_50_settings_changes.html#_similarity_settings

[skmc1976]

I am also faceing that issue,I paste [curl -X PUT “localhost:9200/customer?pretty”] in my terminal and is ok