ElasticSearch No handler for type [search_as_you_type] declared on field [field_name]

Question

I'm trying to implement autocomplete with EslasticSearch and I follow search-as-you-type documentation:

https://www.elastic.co/guide/en/elasticsearch/reference/7.x/search-as-you-type.html#search-as-you-type

When I run a mapping query below I get an exception.

PUT my-index-000001
 {
  "mappings": {
  "properties": {
    "my_field": {
      "type": "search_as_you_type"
    }
   }
  }
 }

{
 "error": {
 "root_cause": [
   {
     "type": "mapper_parsing_exception",
     "reason": "No handler for type [search_as_you_type] declared on field [my_field]"
   }
 ],
"type": "mapper_parsing_exception",
"reason": "Failed to parse mapping [_doc]: No handler for type [search_as_you_type] declared on field [my_field]",
"caused_by": {
  "type": "mapper_parsing_exception",
  "reason": "No handler for type [search_as_you_type] declared on field [my_field]"
  }
 },
 "status": 400
}

Is it documentation providing wrong mapping query or it's me doing something wrong?

Answer 1

search_as_you_type type field was introduced in 7.2 version

Since you are using elasticsearch version 5, you are getting the below error

"reason": "No handler for type [search_as_you_type] declared on field [my_field]