Upgrade Elasticsearch to 9.1.0

pom.xml

@@ -21,7 +21,7 @@
 		<springdata.commons>4.0.0-SNAPSHOT</springdata.commons>
 
 		<!-- version of the ElasticsearchClient	-->
-		<elasticsearch-java>9.0.4</elasticsearch-java>
+		<elasticsearch-java>9.1.0</elasticsearch-java>
 
 		<hoverfly>0.19.0</hoverfly>
 		<log4j>2.23.1</log4j>

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

@@ -6,7 +6,7 @@
 
 * Upgarde to Spring 7
 * Switch to jspecify nullability annotations
-* Upgrade to Elasticsearch 9.0.4
+* Upgrade to Elasticsearch 9.1.0
 * Use the new Elasticsearch Rest5Client as default
 
 

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

@@ -6,7 +6,7 @@ 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
-| 2025.1 (in development) | 6.0.x | 9.0.4 | 7.0.x
+| 2025.1 (in development) | 6.0.x | 9.1.0 | 7.0.x
 | 2025.0 | 5.5.x | 8.18.1 | 6.2.x
 | 2024.1 | 5.4.x | 8.15.5 | 6.1.x
 | 2024.0 | 5.3.xfootnote:oom[Out of maintenance] | 8.13.4 | 6.1.x

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

@@ -17,6 +17,8 @@
 
 import static org.springframework.data.elasticsearch.client.elc.TypeUtils.*;
 
+import co.elastic.clients.util.NamedValue;
+
 import java.util.Arrays;
 import java.util.stream.Collectors;
 
@@ -60,10 +62,11 @@ public co.elastic.clients.elasticsearch.core.search.Highlight getHighlight(Highl
 
 		for (HighlightField highlightField : highlight.getFields()) {
 			String mappedName = mapFieldName(highlightField.getName(), type);
-			highlightBuilder.fields(mappedName, hf -> {
-				addParameters(highlightField.getParameters(), hf, type);
-				return hf;
-			});
+			highlightBuilder.fields(
+					NamedValue.of(mappedName, co.elastic.clients.elasticsearch.core.search.HighlightField.of(hf -> {
+						addParameters(highlightField.getParameters(), hf, type);
+						return hf;
+					})));
 		}
 
 		return highlightBuilder.build();

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

@@ -30,6 +30,7 @@
 import org.jspecify.annotations.Nullable;
 import org.springframework.core.annotation.AnnotatedElementUtils;
 import org.springframework.dao.InvalidDataAccessApiUsageException;
+import org.springframework.data.elasticsearch.ResourceNotFoundException;
 import org.springframework.data.elasticsearch.UncategorizedElasticsearchException;
 import org.springframework.data.elasticsearch.annotations.Mapping;
 import org.springframework.data.elasticsearch.core.IndexInformation;
@@ -315,15 +316,20 @@ public boolean putTemplate(PutTemplateRequest putTemplateRequest) {
 	}
 
 	@Override
-	public TemplateData getTemplate(GetTemplateRequest getTemplateRequest) {
+	public @Nullable TemplateData getTemplate(GetTemplateRequest getTemplateRequest) {
 
 		Assert.notNull(getTemplateRequest, "getTemplateRequest must not be null");
 
 		co.elastic.clients.elasticsearch.indices.GetTemplateRequest getTemplateRequestES = requestConverter
 				.indicesGetTemplateRequest(getTemplateRequest);
-		GetTemplateResponse getTemplateResponse = execute(client -> client.getTemplate(getTemplateRequestES));
 
-		return responseConverter.indicesGetTemplateData(getTemplateResponse, getTemplateRequest.getTemplateName());
+		try {
+			GetTemplateResponse getTemplateResponse = execute(client -> client.getTemplate(getTemplateRequestES));
+			return responseConverter.indicesGetTemplateData(getTemplateResponse, getTemplateRequest.getTemplateName());
+		} catch (ResourceNotFoundException e) {
+			// since Elasticsearch 9.1.0 we get an exception (404) instead of an empty result
+			return null;
+		}
 	}
 
 	@Override

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

@@ -21,6 +21,7 @@
 import co.elastic.clients.elasticsearch.indices.*;
 import co.elastic.clients.transport.ElasticsearchTransport;
 import co.elastic.clients.transport.endpoints.BooleanResponse;
+import org.springframework.data.elasticsearch.ResourceNotFoundException;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
@@ -389,7 +390,8 @@ public Mono<TemplateData> getTemplate(GetTemplateRequest getTemplateRequest) {
 		co.elastic.clients.elasticsearch.indices.GetTemplateRequest getTemplateRequestES = requestConverter
 				.indicesGetTemplateRequest(getTemplateRequest);
 		Mono<GetTemplateResponse> getTemplateResponse = Mono
-				.from(execute(client -> client.getTemplate(getTemplateRequestES)));
+				.from(execute(client -> client.getTemplate(getTemplateRequestES)))
+                .onErrorComplete(ResourceNotFoundException.class);
 
 		return getTemplateResponse.flatMap(response -> {
 			if (response != null) {

src/test/resources/testcontainers-elasticsearch.properties

@@ -15,7 +15,7 @@
 #
 #
 sde.testcontainers.image-name=docker.elastic.co/elasticsearch/elasticsearch
-sde.testcontainers.image-version=9.0.4
+sde.testcontainers.image-version=9.1.0
 #
 #
 # 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