actual.json

{
   "took": 1,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 0.10848885,
      "hits": [
         {
            "_index": "test",
            "_type": "doc",
            "_id": "1",
            "_score": 0.10848885,
            "_source": {
               "tags": [
                  "one hit tag",
                  "two foo tag",
                  "three hit tag",
                  "four foo tag"
               ]
            },
            "highlight": {
               "tags": [
                  "one <em>hit</em> tag",
                  "three <em>hit</em> tag"
               ]
            }
         }
      ]
   }
}

desirable.json

{
   "took": 1,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 0.10848885,
      "hits": [
         {
            "_index": "test",
            "_type": "doc",
            "_id": "1",
            "_score": 0.10848885,
            "_source": {
               "tags": [
                  "one <em>hit</em> tag",
                  "two foo tag",
                  "three <em>hit</em> tag",
                  "four foo tag"
               ]
            },
            "highlight": {
               "tags": [
                  "one <em>hit</em> tag",
                  "three <em>hit</em> tag"
               ]
            }
         }
      ]
   }
}

query

PUT /test/doc/1
{
  "tags": [
    "one hit tag",
    "two foo tag",
    "three hit tag",
    "four foo tag"
  ]
}

GET /test/doc/_search
{
  "query": { 
    "match": { "tags": "hit"} 
  }, 
  "highlight": {
    "fields": {
      "tags": { "number_of_fragments": 0 }
    }
  }
}