ElasticSearch: Specifying types in bulk requests is deprecated

Question

I am getting a warning:

"[types removal] Specifying types in bulk requests is deprecated."]

What do I do wrong? This is my code:

    BulkRequest request = new BulkRequest();

    for(Item item : items) {
        IndexRequest indexRequest = new IndexRequest(INDEX_NAME, DOC_TYPE, item.getIdentifier());
        indexRequest
                .opType(DocWriteRequest.OpType.INDEX) // Index the source. If there an existing document with the id, it will be replaced.
                .source(JsonUtility.toJson(item), XContentType.JSON);

        request.add(indexRequest);
    }

    elastic.bulk(request, RequestOptions.DEFAULT);

Answer 1

The mapping type was removed in Elasticsearch 8 and is deprecated in Elasticsearch 7.

No Elasticsearch version is mentioned in your question, but you can read more about the schedule for removal of mapping types, and react accordingly.