Use Elasticsearch 8.2.2.

pom.xml

@@ -21,8 +21,8 @@
 		<!-- version of the RestHighLevelClient	-->
 		<elasticsearch-rhlc>7.17.3</elasticsearch-rhlc>
 		<!-- version of the new ElasticsearchClient	-->
-		<elasticsearch-java>7.17.3</elasticsearch-java>
-		<log4j>2.17.1</log4j>
+		<elasticsearch-java>8.2.2</elasticsearch-java>
+		<log4j>2.17.2</log4j>
 		<netty>4.1.65.Final</netty>
 		<springdata.commons>3.0.0-SNAPSHOT</springdata.commons>
 		<testcontainers>1.16.2</testcontainers>

src/main/java/org/springframework/data/elasticsearch/client/RestClients.java

@@ -43,6 +43,7 @@
 import org.elasticsearch.client.RestClient;
 import org.elasticsearch.client.RestClientBuilder;
 import org.elasticsearch.client.RestHighLevelClient;
+import org.elasticsearch.client.RestHighLevelClientBuilder;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.util.Assert;
@@ -132,7 +133,7 @@ public static ElasticsearchRestClient create(ClientConfiguration clientConfigura
 			return clientBuilder;
 		});
 
-		RestHighLevelClient client = new RestHighLevelClient(builder);
+		RestHighLevelClient client = new RestHighLevelClientBuilder(builder.build()).setApiCompatibilityMode(true).build();
 		return () -> client;
 	}
 

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

@@ -19,6 +19,7 @@
 import co.elastic.clients.json.jackson.JacksonJsonpMapper;
 import co.elastic.clients.transport.ElasticsearchTransport;
 import co.elastic.clients.transport.TransportOptions;
+import co.elastic.clients.transport.Version;
 import co.elastic.clients.transport.rest_client.RestClientOptions;
 import co.elastic.clients.transport.rest_client.RestClientTransport;
 
@@ -41,8 +42,10 @@
 import org.apache.http.HttpResponseInterceptor;
 import org.apache.http.client.config.RequestConfig;
 import org.apache.http.entity.ByteArrayEntity;
+import org.apache.http.entity.ContentType;
 import org.apache.http.impl.nio.client.HttpAsyncClientBuilder;
 import org.apache.http.message.BasicHeader;
+import org.apache.http.message.BasicNameValuePair;
 import org.apache.http.protocol.HttpContext;
 import org.elasticsearch.client.RequestOptions;
 import org.elasticsearch.client.RestClient;
@@ -242,6 +245,18 @@ private static ElasticsearchTransport getElasticsearchTransport(RestClient restC
 
 		TransportOptions.Builder transportOptionsBuilder = transportOptions != null ? transportOptions.toBuilder()
 				: new RestClientOptions(RequestOptions.DEFAULT).toBuilder();
+
+		// need to add the compatibility header, this is only done automatically when not passing in custom options.
+		// code copied from RestClientTransport as it is not available outside the package
+		ContentType jsonContentType = null;
+		if (Version.VERSION == null) {
+			jsonContentType = ContentType.APPLICATION_JSON;
+		} else {
+			jsonContentType = ContentType.create("application/vnd.elasticsearch+json",
+					new BasicNameValuePair("compatible-with", String.valueOf(Version.VERSION.major())));
+		}
+		transportOptionsBuilder.addHeader("Accept", jsonContentType.toString());
+
 		TransportOptions transportOptionsWithHeader = transportOptionsBuilder
 				.addHeader(X_SPRING_DATA_ELASTICSEARCH_CLIENT, clientType).build();
 

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

@@ -273,18 +273,18 @@ public List<IndexedObjectInformation> doBulkOperation(List<?> queries, BulkOptio
 	// endregion
 
 	@Override
-	protected String getClusterVersion() {
+	public String getClusterVersion() {
 		return execute(client -> client.info().version().number());
 
 	}
 
 	@Override
-	protected String getVendor() {
+	public String getVendor() {
 		return "Elasticsearch";
 	}
 
 	@Override
-	protected String getRuntimeLibraryVersion() {
+	public String getRuntimeLibraryVersion() {
 		return Version.VERSION.toString();
 	}
 

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

@@ -413,17 +413,17 @@ public Flux<? extends AggregationContainer<?>> aggregate(Query query, Class<?> e
 	// endregion
 
 	@Override
-	protected Mono<String> getVendor() {
+	public Mono<String> getVendor() {
 		return Mono.just("Elasticsearch");
 	}
 
 	@Override
-	protected Mono<String> getRuntimeLibraryVersion() {
+	public Mono<String> getRuntimeLibraryVersion() {
 		return Mono.just(Version.VERSION != null ? Version.VERSION.toString() : "null");
 	}
 
 	@Override
-	protected Mono<String> getClusterVersion() {
+	public Mono<String> getClusterVersion() {
 		return Mono.from(execute(ReactiveElasticsearchClient::info)).map(infoResponse -> infoResponse.version().number());
 	}
 

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

@@ -820,7 +820,7 @@ public co.elastic.clients.elasticsearch.core.ReindexRequest reindex(ReindexReque
 				.refresh(reindexRequest.getRefresh()) //
 				.requireAlias(reindexRequest.getRequireAlias()) //
 				.requestsPerSecond(reindexRequest.getRequestsPerSecond()) //
-				.slices(reindexRequest.getSlices());
+				.slices(slices(reindexRequest.getSlices()));
 
 		return builder.build();
 	}
@@ -963,24 +963,24 @@ public UpdateByQueryRequest documentUpdateByQueryRequest(UpdateQuery updateQuery
 					.pipeline(updateQuery.getPipeline()) //
 					.requestsPerSecond(
 							updateQuery.getRequestsPerSecond() != null ? updateQuery.getRequestsPerSecond().longValue() : null) //
-					.slices(updateQuery.getSlices() != null ? Long.valueOf(updateQuery.getSlices()) : null) //
-			;
+					.slices(slices(updateQuery.getSlices() != null ? Long.valueOf(updateQuery.getSlices()) : null));
 
 			if (updateQuery.getAbortOnVersionConflict() != null) {
 				ub.conflicts(updateQuery.getAbortOnVersionConflict() ? Conflicts.Abort : Conflicts.Proceed);
 			}
 
-			if (updateQuery.getBatchSize() != null) {
-				ub.size(Long.valueOf(updateQuery.getBatchSize()));
-			}
-
 			if (updateQuery.getQuery() != null) {
 				Query queryQuery = updateQuery.getQuery();
+
+				if (updateQuery.getBatchSize() != null) {
+					((BaseQuery) queryQuery).setMaxResults(updateQuery.getBatchSize());
+				}
 				ub.query(getQuery(queryQuery, null));
 
 				// no indicesOptions available like in old client
 
 				ub.scroll(time(queryQuery.getScrollTime()));
+
 			}
 
 			// no maxRetries available like in old client
@@ -1164,11 +1164,11 @@ private <T> void prepareSearchRequest(Query query, @Nullable Class<T> clazz, Ind
 
 		if (!query.getRuntimeFields().isEmpty()) {
 
-			Map<String, RuntimeField> runtimeMappings = new HashMap<>();
+			Map<String, List<RuntimeField>> runtimeMappings = new HashMap<>();
 			query.getRuntimeFields().forEach(runtimeField -> {
-				runtimeMappings.put(runtimeField.getName(), RuntimeField.of(rt -> rt //
+				runtimeMappings.put(runtimeField.getName(), Collections.singletonList(RuntimeField.of(rt -> rt //
 						.type(RuntimeFieldType._DESERIALIZER.parse(runtimeField.getType())) //
-						.script(s -> s.inline(is -> is.source(runtimeField.getScript())))));
+						.script(s -> s.inline(is -> is.source(runtimeField.getScript()))))));
 			});
 			builder.runtimeMappings(runtimeMappings);
 		}
@@ -1328,6 +1328,7 @@ private co.elastic.clients.elasticsearch._types.query_dsl.Query getQuery(@Nullab
 		} else {
 			throw new IllegalArgumentException("unhandled Query implementation " + query.getClass().getName());
 		}
+
 		return esQuery;
 	}
 

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

@@ -90,7 +90,7 @@ public ClusterHealth clusterHealth(HealthResponse healthResponse) {
 				.withNumberOfPendingTasks(healthResponse.numberOfPendingTasks()) //
 				.withRelocatingShards(healthResponse.relocatingShards()) //
 				.withStatus(healthResponse.status().toString()) //
-				.withTaskMaxWaitingTimeMillis(Long.parseLong(healthResponse.taskMaxWaitingInQueueMillis())) //
+				.withTaskMaxWaitingTimeMillis(healthResponse.taskMaxWaitingInQueueMillis().toEpochMilli()) //
 				.withTimedOut(healthResponse.timedOut()) //
 				.withUnassignedShards(healthResponse.unassignedShards()) //
 				.build(); //
@@ -144,11 +144,11 @@ public Document indicesGetMapping(GetMappingResponse getMappingResponse, IndexCo
 		if (indexMappingRecord == null) {
 
 			if (mappings.size() != 1) {
-			LOGGER.warn("no mapping returned for index {}", indexCoordinates.getIndexName());
-			return Document.create();
-		}
-		String index = mappings.keySet().iterator().next();
-		indexMappingRecord = mappings.get(index);
+				LOGGER.warn("no mapping returned for index {}", indexCoordinates.getIndexName());
+				return Document.create();
+			}
+			String index = mappings.keySet().iterator().next();
+			indexMappingRecord = mappings.get(index);
 		}
 
 		return Document.parse(toJson(indexMappingRecord.mappings(), jsonpMapper));
@@ -277,9 +277,9 @@ public ReindexResponse reindexResponse(co.elastic.clients.elasticsearch.core.Rei
 				.withNoops(reindexResponse.noops()) //
 				.withBulkRetries(reindexResponse.retries().bulk()) //
 				.withSearchRetries(reindexResponse.retries().search()) //
-				.withThrottledMillis(Long.parseLong(reindexResponse.throttledMillis())) //
+				.withThrottledMillis(reindexResponse.throttledMillis().toEpochMilli()) //
 				.withRequestsPerSecond(reindexResponse.requestsPerSecond()) //
-				.withThrottledUntilMillis(Long.parseLong(reindexResponse.throttledUntilMillis())).withFailures(failures) //
+				.withThrottledUntilMillis(reindexResponse.throttledUntilMillis().toEpochMilli()).withFailures(failures) //
 				.build();
 	}
 

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

@@ -18,7 +18,6 @@
 import co.elastic.clients.elasticsearch._types.*;
 import co.elastic.clients.elasticsearch._types.mapping.FieldType;
 import co.elastic.clients.elasticsearch.core.search.BoundaryScanner;
-import co.elastic.clients.elasticsearch.core.search.BuiltinHighlighterType;
 import co.elastic.clients.elasticsearch.core.search.HighlighterEncoder;
 import co.elastic.clients.elasticsearch.core.search.HighlighterFragmenter;
 import co.elastic.clients.elasticsearch.core.search.HighlighterOrder;
@@ -170,11 +169,11 @@ static HighlighterType highlighterType(@Nullable String value) {
 		if (value != null) {
 			switch (value.toLowerCase()) {
 				case "unified":
-					return HighlighterType.of(b -> b.builtin(BuiltinHighlighterType.Unified));
+					return HighlighterType.Unified;
 				case "plain":
-					return HighlighterType.of(b -> b.builtin(BuiltinHighlighterType.Plain));
+					return HighlighterType.Plain;
 				case "fvh":
-					return HighlighterType.of(b -> b.builtin(BuiltinHighlighterType.FastVector));
+					return HighlighterType.FastVector;
 				default:
 					return null;
 			}
@@ -308,6 +307,16 @@ static SearchType searchType(@Nullable Query.SearchType searchType) {
 		return null;
 	}
 
+	@Nullable
+	static Slices slices(@Nullable Long count) {
+
+		if (count == null) {
+			return null;
+		}
+
+		return Slices.of(s -> s.value(Math.toIntExact(count)));
+	}
+
 	@Nullable
 	static SortMode sortMode(Order.Mode mode) {
 

src/main/java/org/springframework/data/elasticsearch/client/reactive/WebClientProvider.java

@@ -257,6 +257,16 @@ static WebClientProvider getWebClientProvider(ClientConfiguration clientConfigur
 							if (suppliedHeaders != null && suppliedHeaders != HttpHeaders.EMPTY) {
 								httpHeaders.addAll(suppliedHeaders);
 							}
+
+							// this WebClientProvider is built with ES 7 and not used on 8 anymore
+							httpHeaders.add("Accept", "application/vnd.elasticsearch+json;compatible-with=7");
+
+							var contentTypeHeader = "Content-Type";
+							if (httpHeaders.containsKey(contentTypeHeader)) {
+								httpHeaders.remove(contentTypeHeader);
+							}
+							httpHeaders.add(contentTypeHeader, "application/vnd.elasticsearch+json;compatible-with=7");
+
 						}));
 
 		return provider;

src/main/java/org/springframework/data/elasticsearch/core/AbstractElasticsearchTemplate.java

@@ -145,8 +145,8 @@ public void setApplicationContext(ApplicationContext applicationContext) throws
 
 	/**
 	 * Set the {@link EntityCallbacks} instance to use when invoking {@link EntityCallbacks callbacks} like the
-	 * {@link org.springframework.data.elasticsearch.core.event.BeforeConvertCallback}.
-	 * Overrides potentially existing {@link EntityCallbacks}.
+	 * {@link org.springframework.data.elasticsearch.core.event.BeforeConvertCallback}. Overrides potentially existing
+	 * {@link EntityCallbacks}.
 	 *
 	 * @param entityCallbacks must not be {@literal null}.
 	 * @throws IllegalArgumentException if the given instance is {@literal null}.
@@ -588,19 +588,19 @@ protected <T> SearchDocumentResponse.EntityCreator<T> getEntityCreator(ReadDocum
 	 * @return the version as string if it can be retrieved
 	 */
 	@Nullable
-	abstract protected String getClusterVersion();
+	public abstract String getClusterVersion();
 
 	/**
 	 * @return the vendor name of the used cluster and client library
 	 * @since 4.3
 	 */
-	abstract protected String getVendor();
+	public abstract String getVendor();
 
 	/**
 	 * @return the version of the used client runtime library.
 	 * @since 4.3
 	 */
-	abstract protected String getRuntimeLibraryVersion();
+	public abstract String getRuntimeLibraryVersion();
 
 	// endregion
 

src/main/java/org/springframework/data/elasticsearch/core/AbstractReactiveElasticsearchTemplate.java

@@ -611,15 +611,15 @@ public ElasticsearchPersistentEntity<?> getPersistentEntityFor(@Nullable Class<?
 	 * @return the vendor name of the used cluster and client library
 	 * @since 4.3
 	 */
-	abstract protected Mono<String> getVendor();
+	public abstract Mono<String> getVendor();
 
 	/**
 	 * @return the version of the used client runtime library.
 	 * @since 4.3
 	 */
-	abstract protected Mono<String> getRuntimeLibraryVersion();
+	public abstract Mono<String> getRuntimeLibraryVersion();
 
-	abstract protected Mono<String> getClusterVersion();
+	public abstract Mono<String> getClusterVersion();
 
 	/**
 	 * Value class to capture client independent information from a response to an index request.

src/main/java/org/springframework/data/elasticsearch/core/ElasticsearchRestTemplate.java

@@ -607,7 +607,7 @@ private RuntimeException translateException(Exception exception) {
 
 	// region helper methods
 	@Override
-	protected String getClusterVersion() {
+	public String getClusterVersion() {
 		try {
 			return execute(client -> client.info(RequestOptions.DEFAULT)).getVersion().getNumber();
 		} catch (Exception ignored) {}
@@ -629,12 +629,12 @@ public Query idsQuery(List<String> ids) {
 	}
 
 	@Override
-	protected String getVendor() {
+	public String getVendor() {
 		return "Elasticsearch";
 	}
 
 	@Override
-	protected String getRuntimeLibraryVersion() {
+	public String getRuntimeLibraryVersion() {
 		return Version.CURRENT.toString();
 	}
 

src/main/java/org/springframework/data/elasticsearch/core/ReactiveElasticsearchTemplate.java

@@ -676,7 +676,7 @@ protected SearchRequest prepareSearchRequest(SearchRequest request, boolean useS
 
 	// region Helper methods
 	@Override
-	protected Mono<String> getClusterVersion() {
+	public Mono<String> getClusterVersion() {
 		try {
 			return Mono.from(execute(ReactiveElasticsearchClient::info))
 					.map(mainResponse -> mainResponse.getVersion().toString());
@@ -689,7 +689,7 @@ protected Mono<String> getClusterVersion() {
 	 * @since 4.3
 	 */
 	@Override
-	protected Mono<String> getVendor() {
+	public Mono<String> getVendor() {
 		return Mono.just("Elasticsearch");
 	}
 
@@ -698,7 +698,7 @@ protected Mono<String> getVendor() {
 	 * @since 4.3
 	 */
 	@Override
-	protected Mono<String> getRuntimeLibraryVersion() {
+	public Mono<String> getRuntimeLibraryVersion() {
 		return Mono.just(Version.CURRENT.toString());
 	}