Cannot create index with mappings settings

Java API client version

8.2.2

Java version

8

Elasticsearch Version

8.2.2

Problem description

The following code is expected to trigger an index creation in the target server. Instead, the error response below is received

RestClient restClient = RestClient.builder(new HttpHost("localhost", 9200)).build();
ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());

CreateIndexRequest request = new CreateIndexRequest.Builder().index("name")
    .settings(s -> s.mappings(m -> m.totalFields(totalFields -> totalFields.limit(1001))))
    .build();

new ElasticsearchClient(transport).indices().create(request);

Response:

[es/indices.create] failed: [illegal_argument_exception] unknown setting [index.mappings.total_fields.limit] did you mean any of …

[swallez]

This is an issue in the API specification used to produce the Java code: mappings should be mapping.

The fix will be included in the next 8.x and 7.17.x releases.

[KnowledgeGarden]

In earlier versions, there was a clean api with which to load JSON mappings. It’s gone and, post 7, no documentation. Surely there is a way to load JSON mappings in recent versions.