Elasticsearch index creation keeps looking for "_doc"

SpringBoot 2.4.1 Spring Data Elasticsearch 4.1.2

Bug:

I am trying to create the mapping for my index, through the following code:

@Override
    public Mono<Boolean> createIndex() {

        var request = new CreateIndexRequest(getIndex());
        request.source(getMappingSource(), getXContentType());
        return reactiveElasticsearchClient.indices()
            .createIndex(request)
            .doOnSuccess(success ->
                log.info("Index Creation \"{}\": {}", getIndex(), success));
    }

and this mapping:

public static final String DEFAULT_ES_MAPPING_SOURCE =
		"{\n" +
		"    \"mappings\": {\n" +
		"        \"properties\": {\n" +
		"            \"timestamp\": {\n" +
		"                \"type\": \"date\",\n" +
		"                \"format\": \"epoch_millis||yyyy-MM-dd HH:mm:ss||yyyy-MM-dd\"\n" +
		"            }\n" +
		"        }\n" +
		"    }\n" +
		"}";

This error comes out: org.elasticsearch.ElasticsearchStatusException: Elasticsearch exception [type=mapper_parsing_exception, reason=Failed to parse mapping [_doc]: No type specified for field [properties]], Elasticsearch exception [type=mapper_parsing_exception, reason=No type specified for field [properties]]

If I add the “_doc” before “properties” in the mapping JSON (as the previous exception asked me), I get another error (non-sense): org.elasticsearch.ElasticsearchStatusException: Elasticsearch exception [type=illegal_argument_exception, reason=The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.], Elasticsearch exception [type=illegal_argument_exception, reason=The mapping definition cannot be nested under a type [_doc] unless include_type_name is set to true.]

Could you please fix it?

EDIT:

I have found an answer (https://github.com/elastic/elasticsearch/issues/40897#issuecomment-480833056) that shows that your class (ReactiveElasticsearchClient) accepts the wrong CreateIndexRequest.

org.elasticsearch.action.admin.indices.create.CreateIndexRequest is compatible with ES 6.x org.elasticsearch.client.indices.CreateIndexRequest is compatible with ES 7.x [BUT I cannot use it since the client accepts the other]

[sothawo]

There is org.springframework.data.elasticsearch.core.ReactiveIndexOperations#create() and org.springframework.data.elasticsearch.core.ReactiveIndexOperations#putMapping() and these functions definitely work.

But we should indeed use the same CreateIndexRequest as we do in the non-reactive code. The same for the GetIndexRequest, PutMappingRequest and GetMappingRequest. I created #1658 to address that.

[sothawo]

ReactiveIndexOperationshas methods for creating indices, writing mappings and settings. What is missing in these methods that you implement your own createIndex()? Is this in a custom ReactiveIndexOperations implementation?

Although the code is using org.elasticsearch.action.admin.indices.create.CreateIndexRequest it’s working up to the actual Elasticsearch version 7.10.2.