Upgrade to Elasticsearch 8.16.1.

pom.xml

@@ -21,7 +21,7 @@
 		<springdata.commons>3.5.0-SNAPSHOT</springdata.commons>
 
 		<!-- version of the ElasticsearchClient	-->
-		<elasticsearch-java>8.15.3</elasticsearch-java>
+		<elasticsearch-java>8.16.1</elasticsearch-java>
 
 		<hoverfly>0.19.0</hoverfly>
 		<log4j>2.23.1</log4j>

src/main/antora/modules/ROOT/pages/elasticsearch/elasticsearch-new.adoc

@@ -1,13 +1,17 @@
 [[new-features]]
 = What's new
 
+[[new-features.5-5-0]]
+== New in Spring Data Elasticsearch 5.5
+* Upgrade to Elasticsearch 8.16.1.
+
 [[new-features.5-4-0]]
 == New in Spring Data Elasticsearch 5.4
 
 * Upgrade to Elasticsearch 8.15.3.
 * Allow to customize the mapped type name for `@InnerField` and `@Field` annotations.
 * Support for Elasticsearch SQL.
-* Add support for retrieving request executionDuration.    
+* Add support for retrieving request executionDuration.
 
 [[new-features.5-3-0]]
 == New in Spring Data Elasticsearch 5.3

src/main/antora/modules/ROOT/pages/elasticsearch/versions.adoc

@@ -6,8 +6,8 @@ The following table shows the Elasticsearch and Spring versions that are used by
 [cols="^,^,^,^",options="header"]
 |===
 | Spring Data Release Train | Spring Data Elasticsearch | Elasticsearch | Spring Framework
-| 2025.0 (in development) | 5.5.x | 8.15.3 | 6.2.x
-| 2024.1 | 5.4.x | 8.15.3 | 6.1.x
+| 2025.0 (in development) | 5.5.x | 8.16.1 | 6.2.x
+| 2024.1 | 5.4.x | 8.15.5 | 6.1.x
 | 2024.0 | 5.3.x | 8.13.4 | 6.1.x
 | 2023.1 (Vaughan) | 5.2.xfootnote:oom[Out of maintenance] | 8.11.1 | 6.1.x
 | 2023.0 (Ullmann) | 5.1.xfootnote:oom[] | 8.7.1 | 6.0.x

src/main/java/org/springframework/data/elasticsearch/client/elc/AutoCloseableElasticsearchClient.java

@@ -18,6 +18,8 @@
 import co.elastic.clients.elasticsearch.ElasticsearchClient;
 import co.elastic.clients.transport.ElasticsearchTransport;
 
+import java.io.IOException;
+
 import org.elasticsearch.client.RestClient;
 import org.springframework.util.Assert;
 
@@ -36,7 +38,10 @@ public AutoCloseableElasticsearchClient(ElasticsearchTransport transport) {
 	}
 
 	@Override
-	public void close() throws Exception {
-		transport.close();
+	public void close() throws IOException {
+		// since Elasticsearch 8.16 the ElasticsearchClient implements (through ApiClient) the Closeable interface and
+		// handles closing of the underlying transport. We now just call the base class, but keep this as we
+		// have been implementing AutoCloseable since 4.4 and won't change that to a mere Closeable
+		super.close();
 	}
 }

src/main/java/org/springframework/data/elasticsearch/client/elc/ElasticsearchClients.java

@@ -329,7 +329,7 @@ public static ElasticsearchTransport getElasticsearchTransport(RestClient restCl
 		Assert.notNull(jsonpMapper, "jsonpMapper must not be null");
 
 		TransportOptions.Builder transportOptionsBuilder = transportOptions != null ? transportOptions.toBuilder()
-				: new RestClientOptions(RequestOptions.DEFAULT).toBuilder();
+				: new RestClientOptions(RequestOptions.DEFAULT, false).toBuilder();
 
 		RestClientOptions.Builder restClientOptionsBuilder = getRestClientOptionsBuilder(transportOptions);
 

src/main/java/org/springframework/data/elasticsearch/client/elc/ElasticsearchConfiguration.java

@@ -135,6 +135,6 @@ public JsonpMapper jsonpMapper() {
 	 * @return the options that should be added to every request. Must not be {@literal null}
 	 */
 	public TransportOptions transportOptions() {
-		return new RestClientOptions(RequestOptions.DEFAULT);
+		return new RestClientOptions(RequestOptions.DEFAULT, false);
 	}
 }

src/main/java/org/springframework/data/elasticsearch/client/elc/ReactiveElasticsearchClient.java

@@ -27,6 +27,7 @@
 import co.elastic.clients.util.ObjectBuilder;
 import reactor.core.publisher.Mono;
 
+import java.io.IOException;
 import java.util.function.Function;
 
 import org.springframework.lang.Nullable;
@@ -56,8 +57,11 @@ public ReactiveElasticsearchClient withTransportOptions(@Nullable TransportOptio
 	}
 
 	@Override
-	public void close() throws Exception {
-		transport.close();
+	public void close() throws IOException {
+		// since Elasticsearch 8.16 the ElasticsearchClient implements (through ApiClient) the Closeable interface and
+		// handles closing of the underlying transport. We now just call the base class, but keep this as we
+		// have been implementing AutoCloseable since 4.4 and won't change that to a mere Closeable
+		super.close();
 	}
 
 	// region child clients
@@ -127,7 +131,8 @@ public <T> Mono<GetResponse<T>> get(GetRequest request, Class<T> tClass) {
 		// java.lang.Class<TDocument>)
 		// noinspection unchecked
 		JsonEndpoint<GetRequest, GetResponse<T>, ErrorResponse> endpoint = (JsonEndpoint<GetRequest, GetResponse<T>, ErrorResponse>) GetRequest._ENDPOINT;
-		endpoint = new EndpointWithResponseMapperAttr<>(endpoint, "co.elastic.clients:Deserializer:_global.get.Response.TDocument",
+		endpoint = new EndpointWithResponseMapperAttr<>(endpoint,
+				"co.elastic.clients:Deserializer:_global.get.Response.TDocument",
 				getDeserializer(tClass));
 
 		return Mono.fromFuture(transport.performRequestAsync(request, endpoint, transportOptions));
@@ -172,7 +177,8 @@ public <T> Mono<MgetResponse<T>> mget(MgetRequest request, Class<T> clazz) {
 
 		// noinspection unchecked
 		JsonEndpoint<MgetRequest, MgetResponse<T>, ErrorResponse> endpoint = (JsonEndpoint<MgetRequest, MgetResponse<T>, ErrorResponse>) MgetRequest._ENDPOINT;
-		endpoint = new EndpointWithResponseMapperAttr<>(endpoint, "co.elastic.clients:Deserializer:_global.mget.Response.TDocument",
+		endpoint = new EndpointWithResponseMapperAttr<>(endpoint,
+				"co.elastic.clients:Deserializer:_global.mget.Response.TDocument",
 				this.getDeserializer(clazz));
 
 		return Mono.fromFuture(transport.performRequestAsync(request, endpoint, transportOptions));

src/main/java/org/springframework/data/elasticsearch/client/elc/ReactiveElasticsearchConfiguration.java

@@ -125,6 +125,6 @@ public JsonpMapper jsonpMapper() {
 	 * @return the options that should be added to every request. Must not be {@literal null}
 	 */
 	public TransportOptions transportOptions() {
-		return new RestClientOptions(RequestOptions.DEFAULT).toBuilder().build();
+		return new RestClientOptions(RequestOptions.DEFAULT, false).toBuilder().build();
 	}
 }

src/main/java/org/springframework/data/elasticsearch/client/elc/RequestConverter.java

@@ -51,6 +51,7 @@
 import co.elastic.clients.elasticsearch.indices.ExistsIndexTemplateRequest;
 import co.elastic.clients.elasticsearch.indices.ExistsRequest;
 import co.elastic.clients.elasticsearch.indices.update_aliases.Action;
+import co.elastic.clients.elasticsearch.sql.query.SqlFormat;
 import co.elastic.clients.json.JsonData;
 import co.elastic.clients.json.JsonpDeserializer;
 import co.elastic.clients.json.JsonpMapper;
@@ -533,17 +534,22 @@ public co.elastic.clients.elasticsearch.indices.GetTemplateRequest indicesGetTem
 	public co.elastic.clients.elasticsearch.sql.QueryRequest sqlQueryRequest(SqlQuery query) {
 		Assert.notNull(query, "Query must not be null.");
 
-		return co.elastic.clients.elasticsearch.sql.QueryRequest.of(sqb -> {
-			sqb.query(query.getQuery()).catalog(query.getCatalog()).columnar(query.getColumnar()).cursor(query.getCursor())
-					.fetchSize(query.getFetchSize()).fieldMultiValueLeniency(query.getFieldMultiValueLeniency())
-					.indexUsingFrozen(query.getIndexIncludeFrozen()).keepAlive(time(query.getKeepAlive()))
-					.keepOnCompletion(query.getKeepOnCompletion()).pageTimeout(time(query.getPageTimeout()))
-					.requestTimeout(time(query.getRequestTimeout()))
-					.waitForCompletionTimeout(time(query.getWaitForCompletionTimeout())).filter(getQuery(query.getFilter(), null))
-					.timeZone(Objects.toString(query.getTimeZone(), null)).format("json");
-
-			return sqb;
-		});
+		return co.elastic.clients.elasticsearch.sql.QueryRequest.of(sqb -> sqb
+				.query(query.getQuery())
+				.catalog(query.getCatalog())
+				.columnar(query.getColumnar())
+				.cursor(query.getCursor())
+				.fetchSize(query.getFetchSize())
+				.fieldMultiValueLeniency(query.getFieldMultiValueLeniency())
+				.indexUsingFrozen(query.getIndexIncludeFrozen())
+				.keepAlive(time(query.getKeepAlive()))
+				.keepOnCompletion(query.getKeepOnCompletion())
+				.pageTimeout(time(query.getPageTimeout()))
+				.requestTimeout(time(query.getRequestTimeout()))
+				.waitForCompletionTimeout(time(query.getWaitForCompletionTimeout()))
+				.filter(getQuery(query.getFilter(), null))
+				.timeZone(Objects.toString(query.getTimeZone(), null))
+				.format(SqlFormat.Json));
 	}
 
 	// endregion

src/main/java/org/springframework/data/elasticsearch/core/query/highlight/HighlightCommonParameters.java

@@ -80,6 +80,10 @@ public String getBoundaryScannerLocale() {
 		return boundaryScannerLocale;
 	}
 
+	/**
+	 * @deprecated the underlying functionality is deprecated since Elasticsearch 8.8.
+	 */
+	@Deprecated(since = "5.5")
 	public boolean getForceSource() {
 		return forceSource;
 	}
@@ -173,6 +177,10 @@ public SELF withBoundaryScannerLocale(String boundaryScannerLocale) {
 			return (SELF) this;
 		}
 
+		/**
+		 * @deprecated the underlying functionality is deprecated since Elasticsearch 8.8.
+		 */
+		@Deprecated(since = "5.5")
 		public SELF withForceSource(boolean forceSource) {
 			this.forceSource = forceSource;
 			return (SELF) this;

src/main/kotlin/org/springframework/data/elasticsearch/core/SearchOperationsExtensions.kt

@@ -33,11 +33,11 @@ inline fun <reified T : Any> SearchOperations.searchOne(query: Query): SearchHit
 inline fun <reified T : Any> SearchOperations.searchOne(query: Query, index: IndexCoordinates): SearchHit<T>? =
     searchOne(query, T::class.java, index)
 
-inline fun <reified T : Any> SearchOperations.multiSearch(queries: List<out Query>): List<SearchHits<T>> =
+inline fun <reified T : Any> SearchOperations.multiSearch(queries: List<Query>): List<SearchHits<T>> =
     multiSearch(queries, T::class.java)
 
 inline fun <reified T : Any> SearchOperations.multiSearch(
-    queries: List<out Query>,
+    queries: List<Query>,
     index: IndexCoordinates
 ): List<SearchHits<T>> =
     multiSearch(queries, T::class.java, index)

src/test/java/org/springframework/data/elasticsearch/client/elc/DevTests.java

@@ -77,7 +77,7 @@ public class DevTests {
 	private static final SimpleElasticsearchMappingContext mappingContext = new SimpleElasticsearchMappingContext();
 	private static final MappingElasticsearchConverter converter = new MappingElasticsearchConverter(mappingContext);
 
-	private final TransportOptions transportOptions = new RestClientOptions(RequestOptions.DEFAULT).toBuilder()
+	private final TransportOptions transportOptions = new RestClientOptions(RequestOptions.DEFAULT, false).toBuilder()
 			.addHeader("X-SpringDataElasticsearch-AlwaysThere", "true").setParameter("pretty", "true").build();
 
 	private final JsonpMapper jsonpMapper = new JacksonJsonpMapper();

src/test/resources/testcontainers-elasticsearch.properties

@@ -15,7 +15,7 @@
 #
 #
 sde.testcontainers.image-name=docker.elastic.co/elasticsearch/elasticsearch
-sde.testcontainers.image-version=8.15.3
+sde.testcontainers.image-version=8.16.1
 #
 #
 # needed as we do a DELETE /* at the end of the tests, will be required from 8.0 on, produces a warning since 7.13