Documents are automatically deleted in Elasticsearch after insertion

Question

I created an index in Elasticsearch with the following settings. After inserting data into the index using the Bulk API, the number is docs.deletedconstantly increasing. Does this mean that documents are automatically deleted, if so, what did I do wrong?

PUT /inc_index/
{
  "mappings": {
    "store": {
      "properties": {
        "title": {
          "type": "string",
          "term_vector": "with_positions_offsets_payloads",
          "store" : true,
          "index_analyzer" : "fulltext_analyzer"
         },
         "description": {
          "type": "string",
          "term_vector": "with_positions_offsets_payloads",
          "store" : true,
          "index_analyzer" : "fulltext_analyzer"
        },
        "category": {
          "type": "string"
        }
      }
    }
  },
  "settings" : {
    "index" : {
      "number_of_shards" : 5,
      "number_of_replicas" : 1
    },
    "analysis": {
      "analyzer": {
        "fulltext_analyzer": {
          "type": "custom",
          "tokenizer": "whitespace",
          "filter": [
            "lowercase",
            "type_as_payload"
          ]
        }
      }
    }
  }
}

The output signal is "GET /_cat/indices?v"shown below, "docs.deleted"continuously increasing:

health status index    pri rep docs.count docs.deleted store.size pri.store.size  
green  open   inc_index  5   1   2009877       584438      6.8gb          3.6gb

Answer 1

(/ ), . Elasticsearch + : https://www.elastic.co/guide/en/elasticsearch/guide/current/update-doc.html

, , , . Lucene, .