# Updating index mapping using java client

**URL:** <https://forum.opensearch.org/t/updating-index-mapping-using-java-client/16734>\
**Category:** OpenSearch Client Libraries\
**Tags:** opensearch-java\
**Created:** [November 17, 2023, 6:33am UTC](https://forum.opensearch.org/t/updating-index-mapping-using-java-client/16734 "2023-11-17T06:33:04Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![opensearchlearner](https://avatars.discourse-cdn.com/v4/letter/o/dbc845/32.png) [@opensearchlearner](https://forum.opensearch.org/u/opensearchlearner)\
**Post date:** [November 17, 2023, 6:33am UTC](https://forum.opensearch.org/t/updating-index-mapping-using-java-client/16734/1 "2023-11-17T06:33:04Z")

</div>

I’m trying to update index mapping using java client.

The mapping is stored in mapping.json file.  
I’m trying to create PutMappingRequest.  
Is there an easy way to load json file into request, it doesn’t seem easy to use Builder for it so I decided to use `org.opensearch.client.opensearch.indices.PutMappingRequest#_DESERIALIZER`

```auto
    public static void main(String[] args) {
        String mapping = """
                {
                  "dynamic": false,
                  "properties": {
                    "Title": {
                      "type": "keyword",
                      "fields": {
                        "analyzed": {
                          "type": "text"
                        }
                      }
                    }
                  }
                }
                """;

        RestClient restClient = RestClient.builder(HttpHost.create("http://localhost:9200")).build();
        OpenSearchClient openSearchClient = new OpenSearchClient(
                new RestClientTransport(
                        restClient,
                        new JacksonJsonpMapper()
                )
        );

        JsonpMapper mapper = openSearchClient._transport().jsonpMapper();
        jakarta.json.stream.JsonParser parser = mapper.jsonProvider().createParser(new StringReader(mapping));

        PutMappingRequest putMappingRequest = PutMappingRequest._DESERIALIZER.deserialize(
                        parser, mapper
                );
        System.out.println(putMappingRequest);
    }

```

It throws this exception:

```auto
Exception in thread "main" org.opensearch.client.util.MissingRequiredPropertyException: Missing required property 'PutMappingRequest.index'
	at org.opensearch.client.util.ApiTypeHelper.requireNonNull(ApiTypeHelper.java:89)
	at org.opensearch.client.util.ApiTypeHelper.unmodifiableRequired(ApiTypeHelper.java:154)
	at org.opensearch.client.opensearch.indices.PutMappingRequest.<init>(PutMappingRequest.java:137)
	at org.opensearch.client.opensearch.indices.PutMappingRequest$Builder.build(PutMappingRequest.java:868)
	at org.opensearch.client.opensearch.indices.PutMappingRequest$Builder.build(PutMappingRequest.java:440)
	at org.opensearch.client.json.ObjectBuilderDeserializer.deserialize(ObjectBuilderDeserializer.java:92)
	at org.opensearch.client.json.DelegatingDeserializer$SameType.deserialize(DelegatingDeserializer.java:55)

```

It looks index field is mandatory but there is no way to set it.  
How can i fix it? is there an easier way?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex019/uploads/mauve_hedgehog/original/2X/3/33547ea01a5b12dcca2958411d3edd97ae2ea8c1.png) [@system](https://forum.opensearch.org/u/system)\
**Post date:** [January 16, 2024, 6:33am UTC](https://forum.opensearch.org/t/updating-index-mapping-using-java-client/16734/2 "2024-01-16T06:33:18Z")

</div>

Closed on January 16, 2024, 6:33am UTC

This topic was automatically closed 60 days after the last reply. New replies are no longer allowed.