Upgrade Elasticsearch client to 9.4.1.

Closes #3288

Signed-off-by: Peter-Josef Meisch <pj.meisch@sothawo.com>

.github/README.template.adoc

@@ -0,0 +1,83 @@
+= Spring Data for Elasticsearch image:https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A["Revved up by Develocity", link="https://ge.spring.io/scans?search.rootProjectNames=Spring Data Elasticsearch"]
+
+The primary goal of the https://projects.spring.io/spring-data[Spring Data] project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services.
+
+The Spring Data Elasticsearch project provides integration with the https://www.elastic.co/[Elasticsearch] search engine.
+Key functional areas of Spring Data Elasticsearch are a POJO centric model for interacting with Elasticsearch Documents and easily writing a Repository style data access layer.
+
+This project is lead and maintained by the community.
+
+== Features
+
+* Spring configuration support using Java based `@Configuration` classes or an XML namespace for an ES client instances.
+* `ElasticsearchOperations` class and implementations that increases productivity performing common ES operations.
+Includes integrated object mapping between documents and POJOs.
+* Feature Rich Object Mapping integrated with Spring’s Conversion Service
+* Annotation based mapping metadata
+* Automatic implementation of `Repository` interfaces including support for custom search methods.
+* CDI support for repositories
+
+include::https://raw.githubusercontent.com/spring-projects/spring-data-build/refs/heads/main/etc/readme/code-of-conduct.adoc[]
+
+== Getting Started
+
+Here is a quick teaser of an application using Spring Data Repositories in Java:
+
+[source,java]
+----
+public interface PersonRepository extends CrudRepository<Person, Long> {
+
+  List<Person> findByLastname(String lastname);
+
+  List<Person> findByFirstnameLike(String firstname);
+}
+
+@Service
+public class MyService {
+
+  private final PersonRepository repository;
+
+  public MyService(PersonRepository repository) {
+    this.repository = repository;
+  }
+
+  public void doWork() {
+
+    repository.deleteAll();
+
+    Person person = new Person();
+    person.setFirstname("Oliver");
+    person.setLastname("Gierke");
+    repository.save(person);
+
+    List<Person> lastNameResults = repository.findByLastname("Gierke");
+    List<Person> firstNameResults = repository.findByFirstnameLike("Oli");
+ }
+}
+----
+
+=== Using the RestClient
+
+Please check the https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#elasticsearch.clients.configuration[official documentation].
+
+include::https://raw.githubusercontent.com/spring-projects/spring-data-build/refs/heads/main/etc/readme/dependencies.adoc[]
+
+**Compatibility Matrix**
+
+The compatibility between Spring Data Elasticsearch, Elasticsearch client drivers and Spring Boot versions can be found in the https://docs.spring.io/spring-data/elasticsearch/docs/current/reference/html/#preface.versions[reference documentation].
+
+To use the Release candidate versions of the upcoming major version, use our Maven milestone repository and declare the appropriate dependency version:
+
+[source,xml]
+----
+<dependency>
+  <groupId>org.springframework.data</groupId>
+  <artifactId>spring-data-elasticsearch</artifactId>
+  <version>${version}.RCx</version> <!-- x being 1, 2, ... -->
+</dependency>
+----
+
+include::https://raw.githubusercontent.com/spring-projects/spring-data-build/refs/heads/main/etc/readme/getting-help.adoc[]
+
+include::https://raw.githubusercontent.com/spring-projects/spring-data-build/refs/heads/main/etc/readme/license.adoc[]
+

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: CI Build
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main, 'issue/**' ]
+
+permissions: read-all
+
+jobs:
+  build-java:
+    strategy:
+      matrix:
+        java-version: [ base, main ]
+    name: Build project
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Setup Java and Maven
+        uses: spring-projects/spring-data-build/actions/setup-maven@main
+        with:
+          java-version: ${{ matrix.java-version }}
+          develocity-access-key: '${{ secrets.DEVELOCITY_ACCESS_KEY }}'
+      - name: Build
+        uses: spring-projects/spring-data-build/actions/maven-build@main
+        env:
+          TESTCONTAINERS_REUSE_ENABLE: true

.github/workflows/project.yml

@@ -1,45 +0,0 @@
-# GitHub Actions to automate GitHub issues for Spring Data Project Management
-
-name: Spring Data GitHub Issues
-
-on:
-  issues:
-    types: [opened, edited, reopened]
-  issue_comment:
-    types: [created]
-  pull_request_target:
-    types: [opened, edited, reopened]
-
-permissions:
-  contents: read
-  issues: write
-  pull-requests: write
-
-jobs:
-  Inbox:
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'spring-projects' && (github.event.action == 'opened' || github.event.action == 'reopened') && github.event.pull_request == null && !contains(join(github.event.issue.labels.*.name, ', '), 'dependency-upgrade') && !contains(github.event.issue.title, 'Release ')
-    steps:
-      - name: Create or Update Issue Card
-        uses: actions/add-to-project@v1.0.2
-        with:
-          project-url: https://github.com/orgs/spring-projects/projects/25
-          github-token: ${{ secrets.GH_ISSUES_TOKEN_SPRING_DATA }}
-  Pull-Request:
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'spring-projects' && (github.event.action == 'opened' || github.event.action == 'reopened') && github.event.pull_request != null
-    steps:
-      - name: Create or Update Pull Request Card
-        uses: actions/add-to-project@v1.0.2
-        with:
-          project-url: https://github.com/orgs/spring-projects/projects/25
-          github-token: ${{ secrets.GH_ISSUES_TOKEN_SPRING_DATA }}
-  Feedback-Provided:
-    runs-on: ubuntu-latest
-    if: github.repository_owner == 'spring-projects' && github.event_name == 'issue_comment' && github.event.action == 'created' && github.actor != 'spring-projects-issues' && github.event.pull_request == null && github.event.issue.state == 'open' && contains(toJSON(github.event.issue.labels), 'waiting-for-feedback')
-    steps:
-      - name: Update Project Card
-        uses: actions/add-to-project@v1.0.2
-        with:
-          project-url: https://github.com/orgs/spring-projects/projects/25
-          github-token: ${{ secrets.GH_ISSUES_TOKEN_SPRING_DATA }}

.github/workflows/snapshots.yml

@@ -0,0 +1,28 @@
+name: Snapshots
+
+on:
+  workflow_dispatch:
+  push:
+    branches: [ main, 'issue/**' ]
+
+permissions: read-all
+
+jobs:
+  build-snapshots:
+    name: Build and deploy snapshots
+    if: ${{ github.repository_owner == 'spring-projects' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v6
+      - name: Setup Java and Maven
+        uses: spring-projects/spring-data-build/actions/setup-maven@main
+        with:
+          develocity-access-key: '${{ secrets.DEVELOCITY_ACCESS_KEY }}'
+      - name: Deploy to Artifactory
+        uses: spring-projects/spring-data-build/actions/maven-artifactory-deploy@main
+        env:
+          TESTCONTAINERS_REUSE_ENABLE: true
+        with:
+          build-name: 'spring-data-elasticsearch'
+          username: '${{ secrets.ARTIFACTORY_USERNAME }}'
+          password: '${{ secrets.ARTIFACTORY_PASSWORD }}'

.mvn/extensions.xml

@@ -3,6 +3,6 @@
 	<extension>
 		<groupId>io.spring.develocity.conventions</groupId>
 		<artifactId>develocity-conventions-maven-extension</artifactId>
-		<version>0.0.22</version>
+		<version>0.0.25</version>
 	</extension>
 </extensions>

CI.adoc

@@ -1,43 +1,5 @@
 = Continuous Integration
 
-image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2Fmain&subject=2020.0.0%20(main)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
-image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2F4.0.x&subject=Neumann%20(4.0.x)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
-image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2F3.2.x&subject=Moore%20(3.2.x)[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/]
-
 == Running CI tasks locally
 
-Since this pipeline is purely Docker-based, it's easy to:
-
-* Debug what went wrong on your local machine.
-* Test out a a tweak to your `verify.sh` script before sending it out.
-* Experiment against a new image before submitting your pull request.
-
-All of these use cases are great reasons to essentially run what the CI server does on your local machine.
-
-IMPORTANT: To do this you must have Docker installed on your machine.
-
-1. `docker run -it --mount type=bind,source="$(pwd)",target=/spring-data-elasticsearch-github adoptopenjdk/openjdk8:latest /bin/bash`
-+
-This will launch the Docker image and mount your source code at `spring-data-elasticsearch-github`.
-+
-2. `cd spring-data-elasticsearch-github`
-+
-Next, run your tests from inside the container:
-+
-3. `./mvnw clean dependency:list test -Dsort` (or whatever profile you need to test out)
-
-Since the container is binding to your source, you can make edits from your IDE and continue to run build jobs.
-
-If you need to package things up, do this:
-
-1. `docker run -it -v /var/run/docker.sock:/var/run/docker.sock --mount type=bind,source="$(pwd)",target=/spring-data-elasticsearch-github adoptopenjdk/openjdk8:latest /bin/bash`
-+
-This will launch the Docker image and mount your source code at `spring-data-elasticsearch-github`.
-+
-2. `cd spring-data-elasticsearch-github`
-+
-Next, try to package everything up from inside the container:
-+
-3. `./mvnw -Pci,snapshot -Dmaven.test.skip=true clean package`
-
-NOTE: Docker containers can eat up disk space fast! From time to time, run `docker system prune` to clean out old images.
+You can run CI jobs locally using Docker and act[https://nektosact.com/].

Jenkinsfile

@@ -1,132 +0,0 @@
-def p = [:]
-node {
-		checkout scm
-		p = readProperties interpolate: true, file: 'ci/pipeline.properties'
-}
-
-pipeline {
-	agent none
-
-	triggers {
-		pollSCM 'H/10 * * * *'
-		upstream(upstreamProjects: "spring-data-commons/main", threshold: hudson.model.Result.SUCCESS)
-	}
-
-	options {
-		disableConcurrentBuilds()
-		buildDiscarder(logRotator(numToKeepStr: '14'))
-	}
-
-	stages {
-		stage("test: baseline (main)") {
-			when {
-				beforeAgent(true)
-				anyOf {
-					branch(pattern: "main|(\\d\\.\\d\\.x)", comparator: "REGEXP")
-					not { triggeredBy 'UpstreamCause' }
-				}
-			}
-			agent {
-				label 'data'
-			}
-			options { timeout(time: 30, unit: 'MINUTES') }
-
-			environment {
-				ARTIFACTORY = credentials("${p['artifactory.credentials']}")
-				DEVELOCITY_ACCESS_KEY = credentials("${p['develocity.access-key']}")
-			}
-
-			steps {
-				script {
-					docker.withRegistry(p['docker.proxy.registry'], p['docker.proxy.credentials']) {
-						docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.docker']) {
-							sh "PROFILE=none JENKINS_USER_NAME=${p['jenkins.user.name']} ci/verify.sh"
-							sh "JENKINS_USER_NAME=${p['jenkins.user.name']} ci/clean.sh"
-						}
-					}
-				}
-			}
-		}
-
-		stage("Test other configurations") {
-			when {
-				beforeAgent(true)
-				allOf {
-					branch(pattern: "main|(\\d\\.\\d\\.x)", comparator: "REGEXP")
-					not { triggeredBy 'UpstreamCause' }
-				}
-			}
-			parallel {
-				stage("test: baseline (next)") {
-					agent {
-						label 'data'
-					}
-					options { timeout(time: 30, unit: 'MINUTES') }
-					environment {
-						ARTIFACTORY = credentials("${p['artifactory.credentials']}")
-						DEVELOCITY_ACCESS_KEY = credentials("${p['develocity.access-key']}")
-					}
-					steps {
-						script {
-							docker.withRegistry(p['docker.proxy.registry'], p['docker.proxy.credentials']) {
-								docker.image(p['docker.java.next.image']).inside(p['docker.java.inside.docker']) {
-									sh "PROFILE=none JENKINS_USER_NAME=${p['jenkins.user.name']} ci/verify.sh"
-									sh "JENKINS_USER_NAME=${p['jenkins.user.name']} ci/clean.sh"
-								}
-							}
-						}
-					}
-				}
-			}
-		}
-
-		stage('Release to artifactory') {
-			when {
-				beforeAgent(true)
-				anyOf {
-					branch(pattern: "main|(\\d\\.\\d\\.x)", comparator: "REGEXP")
-					not { triggeredBy 'UpstreamCause' }
-				}
-			}
-			agent {
-				label 'data'
-			}
-			options { timeout(time: 20, unit: 'MINUTES') }
-			environment {
-				ARTIFACTORY = credentials("${p['artifactory.credentials']}")
-				DEVELOCITY_ACCESS_KEY = credentials("${p['develocity.access-key']}")
-			}
-			steps {
-				script {
-					docker.withRegistry(p['docker.proxy.registry'], p['docker.proxy.credentials']) {
-						docker.image(p['docker.java.main.image']).inside(p['docker.java.inside.docker']) {
-								sh 'MAVEN_OPTS="-Duser.name=' + "${p['jenkins.user.name']}" + ' -Duser.home=/tmp/jenkins-home" ' +
-									"./mvnw -s settings.xml -Pci,artifactory " +
-									"-Ddevelocity.storage.directory=/tmp/jenkins-home/.develocity-root " +
-									"-Dartifactory.server=${p['artifactory.url']} " +
-									"-Dartifactory.username=${ARTIFACTORY_USR} " +
-									"-Dartifactory.password=${ARTIFACTORY_PSW} " +
-									"-Dartifactory.staging-repository=${p['artifactory.repository.snapshot']} " +
-									"-Dartifactory.build-name=spring-data-elasticsearch " +
-									"-Dartifactory.build-number=spring-data-elasticsearch-${BRANCH_NAME}-build-${BUILD_NUMBER} " +
-									"-Dmaven.repo.local=/tmp/jenkins-home/.m2/spring-data-elasticsearch " +
-									"-Dmaven.test.skip=true clean deploy -U -B"
-						}
-					}
-				}
-			}
-		}
-	}
-
-	post {
-		changed {
-			script {
-				emailext(
-						subject: "[${currentBuild.fullDisplayName}] ${currentBuild.currentResult}",
-						mimeType: 'text/html',
-						recipientProviders: [[$class: 'CulpritsRecipientProvider'], [$class: 'RequesterRecipientProvider']],
-						body: "<a href=\"${env.BUILD_URL}\">${currentBuild.fullDisplayName} is reported as ${currentBuild.currentResult}</a>")
-			}
-		}
-	}
-}

README.adoc

@@ -1,4 +1,4 @@
-= Spring Data for Elasticsearch image:https://jenkins.spring.io/buildStatus/icon?job=spring-data-elasticsearch%2Fmain&subject=Build[link=https://jenkins.spring.io/view/SpringData/job/spring-data-elasticsearch/] https://gitter.im/spring-projects/spring-data[image:https://badges.gitter.im/spring-projects/spring-data.svg[Gitter]] image:https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A["Revved up by Develocity", link="https://ge.spring.io/scans?search.rootProjectNames=Spring Data Elasticsearch"]
+= Spring Data for Elasticsearch image:https://img.shields.io/badge/Revved%20up%20by-Develocity-06A0CE?logo=Gradle&labelColor=02303A["Revved up by Develocity", link="https://ge.spring.io/scans?search.rootProjectNames=Spring Data Elasticsearch"]
 
 The primary goal of the https://projects.spring.io/spring-data[Spring Data] project is to make it easier to build Spring-powered applications that use new data access technologies such as non-relational databases, map-reduce frameworks, and cloud based data services.
 

SECURITY.adoc

@@ -1,9 +1,15 @@
-# Security Policy
+= Security Policy
 
-## Supported Versions
+== Reporting a Vulnerability
 
-Please see the https://spring.io/projects/spring-data-elasticsearch[Spring Data Elasticsearch] project page for supported versions.
+Please, https://github.com/spring-projects/security-advisories/security/advisories/new[open a draft security advisory] if you need to disclose and discuss a security issue in private with the Spring Data team.
+Note that we only accept reports against https://spring.io/projects/spring-data#support[supported versions].
 
-## Reporting a Vulnerability
+For more details, check out our https://spring.io/security-policy[security policy].
 
-Please don't raise security vulnerabilities here. Head over to https://pivotal.io/security to learn how to disclose them responsibly.
+== JAR signing
+
+Spring Data JARs released on Maven Central are signed.
+You'll find more information about the key here: https://spring.io/GPG-KEY-spring.txt
+
+Versions released prior to 2023 may be signed with a different key.

ci/clean.sh

@@ -1,8 +0,0 @@
-#!/bin/bash -x
-
-set -euo pipefail
-
-export JENKINS_USER=${JENKINS_USER_NAME}
-
-MAVEN_OPTS="-Duser.name=${JENKINS_USER} -Duser.home=/tmp/jenkins-home" \
-  ./mvnw -s settings.xml clean -Dscan=false -Dmaven.repo.local=/tmp/jenkins-home/.m2/spring-data-elasticsearch -Ddevelocity.storage.directory=/tmp/jenkins-home/.develocity-root

ci/pipeline.properties

@@ -1,32 +0,0 @@
-# Java versions
-java.main.tag=25-jdk-noble
-java.next.tag=25-jdk-noble
-
-# Docker container images - standard
-docker.java.main.image=library/eclipse-temurin:${java.main.tag}
-docker.java.next.image=library/eclipse-temurin:${java.next.tag}
-
-# Supported versions of MongoDB
-docker.mongodb.6.0.version=6.0.23
-docker.mongodb.7.0.version=7.0.20
-docker.mongodb.8.0.version=8.0.9
-
-# Supported versions of Redis
-docker.redis.6.version=6.2.13
-docker.redis.7.version=7.2.4
-docker.valkey.8.version=8.1.1
-
-# Docker environment settings
-docker.java.inside.basic=-v $HOME:/tmp/jenkins-home
-docker.java.inside.docker=-u root -v /var/run/docker.sock:/var/run/docker.sock -v /usr/bin/docker:/usr/bin/docker -v $HOME:/tmp/jenkins-home
-
-# Credentials
-docker.registry=
-docker.credentials=hub.docker.com-springbuildmaster
-docker.proxy.registry=https://docker-hub.usw1.packages.broadcom.com
-docker.proxy.credentials=usw1_packages_broadcom_com-jenkins-token
-artifactory.credentials=02bd1690-b54f-4c9f-819d-a77cb7a9822c
-artifactory.url=https://repo.spring.io
-artifactory.repository.snapshot=libs-snapshot-local
-develocity.access-key=gradle_enterprise_secret_access_key
-jenkins.user.name=spring-builds+jenkins

ci/verify.sh

@@ -1,10 +0,0 @@
-#!/bin/bash -x
-
-set -euo pipefail
-
-mkdir -p /tmp/jenkins-home/.m2/spring-data-elasticsearch
-export JENKINS_USER=${JENKINS_USER_NAME}
-
-MAVEN_OPTS="-Duser.name=${JENKINS_USER} -Duser.home=/tmp/jenkins-home" \
-  ./mvnw -s settings.xml \
-  -P${PROFILE} clean dependency:list verify -Dsort -U -B -Dmaven.repo.local=/tmp/jenkins-home/.m2/spring-data-elasticsearch -Ddevelocity.storage.directory=/tmp/jenkins-home/.develocity-root

pom.xml

@@ -5,12 +5,12 @@
 
 	<groupId>org.springframework.data</groupId>
 	<artifactId>spring-data-elasticsearch</artifactId>
-	<version>6.0.0-RC2</version>
+	<version>6.1.0-SNAPSHOT</version>
 
 	<parent>
 		<groupId>org.springframework.data.build</groupId>
 		<artifactId>spring-data-parent</artifactId>
-		<version>4.0.0-RC2</version>
+		<version>4.1.0-SNAPSHOT</version>
 	</parent>
 
 	<name>Spring Data Elasticsearch</name>
@@ -18,14 +18,14 @@
 	<url>https://github.com/spring-projects/spring-data-elasticsearch</url>
 
 	<properties>
-		<springdata.commons>4.0.0-RC2</springdata.commons>
+		<springdata.commons>4.1.0-SNAPSHOT</springdata.commons>
 
 		<!-- version of the ElasticsearchClient	-->
-		<elasticsearch-java>9.2.0</elasticsearch-java>
-		<elasticsearch-rest-client>9.2.0</elasticsearch-rest-client>
+		<elasticsearch-java>9.4.1</elasticsearch-java>
+		<elasticsearch-rest-client>9.4.1</elasticsearch-rest-client>
 
 		<hoverfly>0.20.2</hoverfly>
-		<log4j>2.25.1</log4j>
+		<log4j>2.25.4</log4j>
 		<jsonassert>1.5.3</jsonassert>
 		<wiremock>3.9.2</wiremock>
 
@@ -91,6 +91,27 @@
 		<url>https://github.com/spring-projects/spring-data-elasticsearch/issues</url>
 	</issueManagement>
 
+
+	<dependencyManagement>
+		<dependencies>
+
+			<dependency>
+				<groupId>org.apache.commons</groupId>
+				<artifactId>commons-lang3</artifactId>
+				<version>3.19.0</version>
+				<scope>test</scope>
+			</dependency>
+
+			<dependency>
+				<groupId>commons-io</groupId>
+				<artifactId>commons-io</artifactId>
+				<version>2.20.0</version>
+				<scope>test</scope>
+			</dependency>
+
+		</dependencies>
+	</dependencyManagement>
+
 	<dependencies>
 
 		<!-- Spring -->
@@ -158,17 +179,30 @@
 		</dependency>
 
 		<!-- Jackson JSON Mapper -->
+		<dependency>
+			<groupId>tools.jackson.core</groupId>
+			<artifactId>jackson-core</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>tools.jackson.core</groupId>
+			<artifactId>jackson-databind</artifactId>
+		</dependency>
+
+        <!-- Version 2 to use with the legacy RestClient -->
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-core</artifactId>
+            <scope>provided</scope>
+            <optional>true</optional>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>
+            <scope>provided</scope>
+            <optional>true</optional>
 		</dependency>
 
 		<!-- CDI -->
-
 		<dependency>
 			<groupId>javax.interceptor</groupId>
 			<artifactId>javax.interceptor-api</artifactId>
@@ -301,21 +335,6 @@
 			<scope>test</scope>
 		</dependency>
 
-		<!-- Upgrade xbean to 4.5 to prevent incompatibilities due to ASM versions -->
-		<dependency>
-			<groupId>org.apache.xbean</groupId>
-			<artifactId>xbean-asm5-shaded</artifactId>
-			<version>4.5</version>
-			<scope>test</scope>
-		</dependency>
-
-		<dependency>
-			<groupId>javax.servlet</groupId>
-			<artifactId>javax.servlet-api</artifactId>
-			<version>3.1.0</version>
-			<scope>test</scope>
-		</dependency>
-
 		<dependency>
 			<groupId>org.mockito</groupId>
 			<artifactId>mockito-junit-jupiter</artifactId>
@@ -323,27 +342,12 @@
 			<scope>test</scope>
 		</dependency>
 
-		<dependency>
-			<groupId>org.apache.commons</groupId>
-			<artifactId>commons-lang3</artifactId>
-			<version>3.19.0</version>
-			<scope>test</scope>
-		</dependency>
-
 		<dependency>
 			<groupId>org.testcontainers</groupId>
 			<artifactId>testcontainers-elasticsearch</artifactId>
 			<scope>test</scope>
 		</dependency>
 
-		<!--we need Murmur3Hash in a test, before 5.2 we had it from the old Elasticsearch dependency	-->
-		<dependency>
-			<groupId>commons-codec</groupId>
-			<artifactId>commons-codec</artifactId>
-			<version>1.15</version>
-			<scope>test</scope>
-		</dependency>
-
 		<dependency>
 			<groupId>com.tngtech.archunit</groupId>
 			<artifactId>archunit-junit5</artifactId>
@@ -351,7 +355,13 @@
 			<scope>test</scope>
 		</dependency>
 
-	</dependencies>
+        <dependency>
+            <groupId>io.micrometer</groupId>
+            <artifactId>micrometer-observation-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+    </dependencies>
 
 	<build>
 		<resources>
@@ -489,8 +499,20 @@
 	</profiles>
 
 	<repositories>
-		
-		
+		<repository>
+			<id>spring-snapshot</id>
+			<url>https://repo.spring.io/snapshot</url>
+			<snapshots>
+				<enabled>true</enabled>
+			</snapshots>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+		</repository>
+		<repository>
+			<id>spring-milestone</id>
+			<url>https://repo.spring.io/milestone</url>
+		</repository>
 	</repositories>
 
 </project>

src/main/antora/antora-playbook.yml

@@ -17,7 +17,7 @@ content:
     - url: https://github.com/spring-projects/spring-data-commons
       # Refname matching:
       # https://docs.antora.org/antora/latest/playbook/content-refname-matching/
-      branches: [ main, 3.4.x, 3.3.x ]
+      branches: [ main ]
       start_path: src/main/antora
 asciidoc:
   attributes:

src/main/antora/antora.yml

@@ -6,12 +6,8 @@ nav:
 ext:
   collector:
     - run:
-        command: ./mvnw validate process-resources -am -Pantora-process-resources
+        command: ./mvnw -B validate process-resources dependency:unpack -am -Pantora-process-resources
         local: true
       scan:
-        dir: target/classes/
-    - run:
-        command: ./mvnw package -Pdistribute
-        local: true
-      scan:
-        dir: target/antora
+        - dir: target/classes/
+        - dir: target/antora/

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

@@ -5,7 +5,7 @@
 Spring Data support for Elasticsearch contains a wide range of features:
 
 * Spring configuration support for various xref:elasticsearch/clients.adoc[Elasticsearch clients].
-* The xref:elasticsearch/template.adoc[`ElasticsearchTemplate` and `ReactiveElasticsearchTemplate`] helper classes that provide object mapping between ES index operations and POJOs.
+* The xref:elasticsearch/template.adoc[`ElasticsearchTemplate` and `ReactiveElasticsearchTemplate`] helper classes that provide object mapping between Elasticsearch index operations and POJOs.
 * xref:elasticsearch/template.adoc#exception-translation[Exception translation] into Spring's portable {springDocsUrl}data-access.html#dao-exceptions[Data Access Exception Hierarchy].
 * Feature rich xref:elasticsearch/object-mapping.adoc[object mapping] integrated with _Spring's_ {springDocsUrl}core.html#core-convert[Conversion Service].
 * xref:elasticsearch/object-mapping.adoc#elasticsearch.mapping.meta-model.annotations[Annotation-based mapping] metadata that is extensible to support other metadata formats.

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

@@ -9,7 +9,7 @@ Although the Elasticsearch Client can be used directly to work with the cluster,
 [[elasticsearch.clients.rest5client]]
 == Imperative Rest5Client
 
-To use the imperative (non-reactive) Rest5Client, a configuration bean must be configured like this:
+To use the imperative (non-reactive) Rest5Client - the default client provided by the Elasticsearch Java client library from version 9 on -, a configuration bean must be configured like this:
 
 ====
 [source,java]
@@ -39,7 +39,9 @@ The following beans can then be injected in other Spring components:
 ====
 [source,java]
 ----
-import org.springframework.beans.factory.annotation.Autowired;@Autowired
+import org.springframework.beans.factory.annotation.Autowired;
+
+@Autowired
 ElasticsearchOperations operations;      <.>
 
 @Autowired
@@ -83,7 +85,7 @@ To use the imperative (non-reactive) RestClient - deprecated since version 6 - ,
 ----
 ====
 
-The configuration bean must be configured like this:
+The configuration bean must then be configured like this:
 
 ====
 [source,java]
@@ -113,14 +115,16 @@ The following beans can then be injected in other Spring components:
 ====
 [source,java]
 ----
-import org.springframework.beans.factory.annotation.Autowired;@Autowired
+import org.springframework.beans.factory.annotation.Autowired;
+
+@Autowired
 ElasticsearchOperations operations;      <.>
 
 @Autowired
 ElasticsearchClient elasticsearchClient; <.>
 
 @Autowired
-RestClient restClient;                 <.>
+RestClient restClient;                   <.>
 
 @Autowired
 JsonpMapper jsonpMapper;                 <.>
@@ -167,6 +171,8 @@ The following beans can then be injected in other Spring components:
 ====
 [source,java]
 ----
+import org.springframework.beans.factory.annotation.Autowired;
+
 @Autowired
 ReactiveElasticsearchOperations operations;      <.>
 
@@ -226,6 +232,8 @@ The following beans can then be injected in other Spring components:
 ====
 [source,java]
 ----
+import org.springframework.beans.factory.annotation.Autowired;
+
 @Autowired
 ReactiveElasticsearchOperations operations;      <.>
 
@@ -294,7 +302,7 @@ ClientConfiguration clientConfiguration = ClientConfiguration.builder()
 
 <.> Define default headers, if they need to be customized
 <.> Use the builder to provide cluster addresses, set default `HttpHeaders` or enable SSL.
-<.> Optionally enable SSL.There exist overloads of this function that can take a `SSLContext` or as an alternative the fingerprint of the certificate as it is output by Elasticsearch 8 on startup.
+<.> Optionally enable SSL.There exist overloads of this function that can take a `SSLContext` or as an alternative the fingerprint of the certificate as it is output by Elasticsearch on startup (since version 8).
 <.> Optionally set a proxy.
 <.> Optionally set a path prefix, mostly used when different clusters a behind some reverse proxy.
 <.> Set the connection timeout.
@@ -320,7 +328,7 @@ The following callbacks are provided:
 ==== Configuration of the low level Elasticsearch `Rest5Client`:
 
 This callback provides a `org.elasticsearch.client.RestClientBuilder` that can be used to configure the Elasticsearch
-`RestClient`:
+`Rest5Client`:
 ====
 [source,java]
 ----
@@ -450,11 +458,31 @@ ClientConfiguration.builder()
 == Client Logging
 
 To see what is actually sent to and received from the server `Request` / `Response` logging on the transport level needs to be turned on as outlined in the snippet below.
-This can be enabled in the Elasticsearch client by setting the level of the `tracer` package to "trace" (see
-https://www.elastic.co/guide/en/elasticsearch/client/java-api-client/current/java-rest-low-usage-logging.html)
+This can be enabled in the Elasticsearch client by setting the level of the `co.elastic.clients.transport.rest5_client.low_level.Request` package to "trace" (see
+https://www.elastic.co/docs/reference/elasticsearch/clients/java/transport/rest5-client/usage/logging)
 
 .Enable transport layer logging
+[tabs]
+======
+XML::
++
 [source,xml]
 ----
-<logger name="tracer" level="trace"/>
+<logger name="co.elastic.clients.transport.rest5_client.low_level.Request" level="trace"/>
 ----
+
+yml::
++
+[source,yml]
+----
+logging.level:
+  co.elastic.clients.transport.rest5_client.low_level.Request: trace
+----
+
+ini::
++
+[source,ini]
+----
+logging.level.co.elastic.clients.transport.rest5_client.low_level.Request=trace
+----
+======

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

@@ -1,12 +1,20 @@
 [[new-features]]
 = What's new
 
+[[new-features.6-1-0]]
+== New in Spring Data Elasticsearch 6.1
+
+* Upgrade to Elasticsearch 9.4.1
+* Add support to use `IndexCoordinates` as repository query parameter
+* Add support for includeNamedQueriesScore in Query
+* Add support for Micrometer observation.
+
 [[new-features.6-0-0]]
 == New in Spring Data Elasticsearch 6.0
 
 * Upgrade to Spring 7
 * Switch to jspecify nullability annotations
-* Upgrade to Elasticsearch 9.2.0
+* Upgrade to Elasticsearch 9.2.1
 * Use the new Elasticsearch Rest5Client as default
 * Add support for SpEL expressions in the `settingPath` parameter of the `@Setting` annotation
 

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

@@ -11,7 +11,7 @@ When creating Elasticsearch indices with Spring Data Elasticsearch different ind
 The following arguments are available:
 
 * `useServerConfiguration` does not send any settings parameters, so the Elasticsearch server configuration determines them.
-* `settingPath` refers to a JSON file defining the settings that must be resolvable in the classpath
+* `settingPath` refers to a JSON file defining the settings that must be resolvable in the classpath, it is possible to use a SpEL expression here
 * `shards` the number of shards to use, defaults to _1_
 * `replicas` the number of replicas, defaults to _1_
 * `refreshIntervall`, defaults to _"1s"_

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

@@ -6,10 +6,11 @@ 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 | 9.2.0 | 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
+| 2026.0 | 6.1.x | 9.4.1 | 7.0.x
+| 2025.1 | 6.0.x | 9.2.2 | 7.0.x
+| 2025.0 | 5.5.xfootnote:oom[Out of maintenance] | 8.18.1 | 6.2.x
+| 2024.1 | 5.4.xfootnote:oom[] | 8.15.5 | 6.1.x
+| 2024.0 | 5.3.xfootnote:oom[] | 8.13.4 | 6.1.x
 | 2023.1 (Vaughan) | 5.2.xfootnote:oom[] | 8.11.1 | 6.1.x
 | 2023.0 (Ullmann) | 5.1.xfootnote:oom[] | 8.7.1 | 6.0.x
 | 2022.0 (Turing) | 5.0.xfootnote:oom[] | 8.5.3 | 6.0.x

src/main/antora/modules/ROOT/pages/repositories/projections.adoc

@@ -1,4 +1,13 @@
 [[elasticsearch.projections]]
 = Projections
 
+[[elasticsearch.projections.limitations]]
+== Spring Data Elasticsearch Projection Limitations
+
+This chapter is pulled in from the Spring Data Commons documentation, but does not apply to Spring Data Elasticsearch.
+
+IMPORTANT: Interface-based projections are not supported in Spring Data Elasticsearch repository query methods.
+
+To limit the fields returned from Elasticsearch, use the xref:elasticsearch/repositories/elasticsearch-repositories.adoc#elasticsearch.repositories.annotations.sourcefilters[`@SourceFilters`] annotation on your repository methods instead.
+
 include::{commons}@data-commons::page$repositories/projections.adoc[leveloffset=+1]

src/main/java/org/springframework/data/elasticsearch/BulkFailureException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -15,10 +15,11 @@
  */
 package org.springframework.data.elasticsearch;
 
-import org.springframework.dao.DataRetrievalFailureException;
-
 import java.util.Map;
 
+import org.jspecify.annotations.Nullable;
+import org.springframework.dao.DataRetrievalFailureException;
+
 /**
  * @author Peter-Josef Meisch
  * @author Illia Ulianov
@@ -42,6 +43,6 @@ public class BulkFailureException extends DataRetrievalFailureException {
 	 * @author Illia Ulianov
 	 * @since 5.2
 	 */
-	public record FailureDetails(Integer status, String errorMessage) {
+	public record FailureDetails(Integer status, @Nullable String errorMessage) {
 	}
 }

src/main/java/org/springframework/data/elasticsearch/ElasticsearchErrorCause.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -28,7 +28,7 @@ import org.jspecify.annotations.Nullable;
 public class ElasticsearchErrorCause {
 	@Nullable private final String type;
 
-	private final String reason;
+	@Nullable private final String reason;
 
 	@Nullable private final String stackTrace;
 
@@ -38,7 +38,7 @@ public class ElasticsearchErrorCause {
 
 	private final List<ElasticsearchErrorCause> suppressed;
 
-	public ElasticsearchErrorCause(@Nullable String type, String reason, @Nullable String stackTrace,
+	public ElasticsearchErrorCause(@Nullable String type, @Nullable String reason, @Nullable String stackTrace,
 			@Nullable ElasticsearchErrorCause causedBy, List<ElasticsearchErrorCause> rootCause,
 			List<ElasticsearchErrorCause> suppressed) {
 		this.type = type;
@@ -54,7 +54,7 @@ public class ElasticsearchErrorCause {
 		return type;
 	}
 
-	public String getReason() {
+	public @Nullable String getReason() {
 		return reason;
 	}
 

src/main/java/org/springframework/data/elasticsearch/NoSuchIndexException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2025 the original author or authors.
+ * Copyright 2019-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/ResourceFailureException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/ResourceNotFoundException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/RestStatusException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/UncategorizedElasticsearchException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/VersionConflictException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2025 the original author or authors.
+ * Copyright 2023-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Alias.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Aliases.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/CompletionContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2025 the original author or authors.
+ * Copyright 2019-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/CompletionField.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2025 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/CountQuery.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/DateFormat.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2025 the original author or authors.
+ * Copyright 2014-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Document.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2025 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Dynamic.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Field.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2025 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/FieldElementType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/FieldType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2025 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Filter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/GeoPointField.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2025 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/GeoShapeField.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017-2025 the original author or authors.
+ * Copyright 2017-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Highlight.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/HighlightField.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/HighlightParameters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/IndexOptions.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2025 the original author or authors.
+ * Copyright 2019-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/IndexPrefixes.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2025 the original author or authors.
+ * Copyright 2019-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/IndexedIndexName.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2025 the original author or authors.
+ * Copyright 2023-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/InnerField.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2025 the original author or authors.
+ * Copyright 2014-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/JoinTypeRelation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/JoinTypeRelations.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/KnnAlgorithmType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/KnnIndexOptions.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/KnnSimilarity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Mapping.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2025 the original author or authors.
+ * Copyright 2014-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/MappingAlias.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/MultiField.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2025 the original author or authors.
+ * Copyright 2014-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/NullValueType.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2020-2025 the original author or authors.
+ * Copyright 2020-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Query.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2025 the original author or authors.
+ * Copyright 2013-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/SearchTemplateQuery.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2025 the original author or authors.
+ * Copyright 2025-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Setting.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2025 the original author or authors.
+ * Copyright 2014-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/Similarity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2025 the original author or authors.
+ * Copyright 2019-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/SourceFilters.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/TermVector.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2019-2025 the original author or authors.
+ * Copyright 2019-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/ValueConverter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/WriteOnlyProperty.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/WriteTypeHint.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/annotations/package-info.java

@@ -1,2 +1,18 @@
+/*
+ * Copyright 2022-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 @org.jspecify.annotations.NullMarked
 package org.springframework.data.elasticsearch.annotations;

src/main/java/org/springframework/data/elasticsearch/aot/ElasticsearchAotPredicates.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2025 the original author or authors.
+ * Copyright 2023-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/aot/SpringDataElasticsearchRuntimeHints.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2023-2025 the original author or authors.
+ * Copyright 2023-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

src/main/java/org/springframework/data/elasticsearch/aot/package-info.java

@@ -1,2 +1,18 @@
+/*
+ * Copyright 2022-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 @org.jspecify.annotations.NullMarked
 package org.springframework.data.elasticsearch.aot;

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2025 the original author or authors.
+ * Copyright 2018-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2025 the original author or authors.
+ * Copyright 2018-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2025 the original author or authors.
+ * Copyright 2018-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2025 the original author or authors.
+ * Copyright 2018-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2025 the original author or authors.
+ * Copyright 2018-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2018-2025 the original author or authors.
+ * Copyright 2018-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2024-2025 the original author or authors.
+ * Copyright 2024-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2026-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.elasticsearch.client.elc;
+
+import io.micrometer.common.KeyValues;
+
+/**
+ * Default {@link ElasticsearchObservationConvention} implementation.
+ *
+ * @author maryantocinn
+ * @since 6.1
+ */
+public class DefaultElasticsearchObservationConvention implements ElasticsearchObservationConvention {
+
+	public static final DefaultElasticsearchObservationConvention INSTANCE = new DefaultElasticsearchObservationConvention();
+
+	@Override
+	public String getName() {
+		return ElasticsearchObservation.ELASTICSEARCH_COMMAND_OBSERVATION.getName();
+	}
+
+	@Override
+	public String getContextualName(ElasticsearchObservationContext context) {
+
+		String indexName = context.getIndexName();
+		if (indexName != null) {
+			return context.getOperationName().getValue() + " " + indexName;
+		}
+		return context.getOperationName().getValue();
+	}
+
+	@Override
+	public KeyValues getLowCardinalityKeyValues(ElasticsearchObservationContext context) {
+
+		KeyValues keyValues = KeyValues.of(
+				ElasticsearchObservation.LowCardinalityKeyNames.OPERATION.withValue(context.getOperationName().getValue()));
+
+		String indexName = context.getIndexName();
+		if (indexName != null) {
+			keyValues = keyValues.and(ElasticsearchObservation.LowCardinalityKeyNames.COLLECTION.withValue(indexName));
+		}
+
+		return keyValues;
+	}
+
+	@Override
+	public KeyValues getHighCardinalityKeyValues(ElasticsearchObservationContext context) {
+
+		Integer batchSize = context.getBatchSize();
+		if (batchSize != null) {
+			return KeyValues.of(
+					ElasticsearchObservation.HighCardinalityKeyNames.BATCH_SIZE.withValue(String.valueOf(batchSize)));
+		}
+
+		return KeyValues.empty();
+	}
+}

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -24,6 +24,14 @@ import co.elastic.clients.elasticsearch.core.search.Hit;
 import co.elastic.clients.elasticsearch.core.search.NestedIdentity;
 import co.elastic.clients.json.JsonData;
 import co.elastic.clients.json.JsonpMapper;
+
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.jspecify.annotations.Nullable;
@@ -36,13 +44,6 @@ import org.springframework.data.elasticsearch.core.document.SearchDocumentAdapte
 import org.springframework.data.elasticsearch.core.document.SearchDocumentResponse;
 import org.springframework.util.Assert;
 
-import java.util.Collections;
-import java.util.LinkedHashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.function.Function;
-import java.util.stream.Collectors;
-
 /**
  * Utility class to adapt different Elasticsearch responses to a
  * {@link org.springframework.data.elasticsearch.core.document.Document}
@@ -54,188 +55,187 @@ import java.util.stream.Collectors;
  */
 final class DocumentAdapters {
 
-    private static final Log LOGGER = LogFactory.getLog(DocumentAdapters.class);
+	private static final Log LOGGER = LogFactory.getLog(DocumentAdapters.class);
 
-    private DocumentAdapters() {
-    }
+	private DocumentAdapters() {}
 
-    /**
-     * Creates a {@link SearchDocument} from a {@link Hit} returned by the Elasticsearch client.
-     *
-     * @param hit         the hit object
-     * @param jsonpMapper to map JsonData objects
-     * @return the created {@link SearchDocument}
-     */
-    public static SearchDocument from(Hit<?> hit, JsonpMapper jsonpMapper) {
+	/**
+	 * Creates a {@link SearchDocument} from a {@link Hit} returned by the Elasticsearch client.
+	 *
+	 * @param hit the hit object
+	 * @param jsonpMapper to map JsonData objects
+	 * @return the created {@link SearchDocument}
+	 */
+	public static SearchDocument from(Hit<?> hit, JsonpMapper jsonpMapper) {
 
-        Assert.notNull(hit, "hit must not be null");
+		Assert.notNull(hit, "hit must not be null");
 
-        Map<String, List<String>> highlightFields = hit.highlight();
+		Map<String, List<String>> highlightFields = hit.highlight();
 
-        Map<String, SearchDocumentResponse> innerHits = new LinkedHashMap<>();
-        hit.innerHits().forEach((name, innerHitsResult) -> {
-            // noinspection ReturnOfNull
-            innerHits.put(name, SearchDocumentResponseBuilder.from(innerHitsResult.hits(), null, null, null, 0, null, null,
-                    searchDocument -> null, jsonpMapper));
-        });
+		Map<String, SearchDocumentResponse> innerHits = new LinkedHashMap<>();
+		hit.innerHits().forEach((name, innerHitsResult) -> {
+			// noinspection ReturnOfNull
+			innerHits.put(name, SearchDocumentResponseBuilder.from(innerHitsResult.hits(), null, null, null, 0, null, null,
+					searchDocument -> null, jsonpMapper));
+		});
 
-        NestedMetaData nestedMetaData = from(hit.nested());
+		NestedMetaData nestedMetaData = from(hit.nested());
 
-        Explanation explanation = from(hit.explanation());
+		Explanation explanation = from(hit.explanation());
 
-        Map<String, Double> matchedQueries = hit.matchedQueries();
+		Map<String, Double> matchedQueries = hit.matchedQueries();
 
-        Function<Map<String, JsonData>, EntityAsMap> fromFields = fields -> {
-            StringBuilder sb = new StringBuilder("{");
-            final boolean[] firstField = {true};
-            hit.fields().forEach((key, jsonData) -> {
-                if (!firstField[0]) {
-                    sb.append(',');
-                }
-                sb.append('"').append(key).append("\":") //
-                        .append(jsonData.toJson(jsonpMapper).toString());
-                firstField[0] = false;
-            });
-            sb.append('}');
-            return new EntityAsMap().fromJson(sb.toString());
-        };
+		Function<Map<String, JsonData>, EntityAsMap> fromFields = fields -> {
+			StringBuilder sb = new StringBuilder("{");
+			final boolean[] firstField = { true };
+			hit.fields().forEach((key, jsonData) -> {
+				if (!firstField[0]) {
+					sb.append(',');
+				}
+				sb.append('"').append(key).append("\":") //
+						.append(jsonData.toJson(jsonpMapper).toString());
+				firstField[0] = false;
+			});
+			sb.append('}');
+			return new EntityAsMap().fromJson(sb.toString());
+		};
 
-        EntityAsMap hitFieldsAsMap = fromFields.apply(hit.fields());
+		EntityAsMap hitFieldsAsMap = fromFields.apply(hit.fields());
 
-        Map<String, List<Object>> documentFields = new LinkedHashMap<>();
-        hitFieldsAsMap.forEach((key, value) -> {
-            if (value instanceof List) {
-                // noinspection unchecked
-                documentFields.put(key, (List<Object>) value);
-            } else {
-                documentFields.put(key, Collections.singletonList(value));
-            }
-        });
+		Map<String, List<@Nullable Object>> documentFields = new LinkedHashMap<>();
+		hitFieldsAsMap.forEach((key, value) -> {
+			if (value instanceof List) {
+				// noinspection unchecked
+				documentFields.put(key, (List<Object>) value);
+			} else {
+				documentFields.put(key, Collections.singletonList(value));
+			}
+		});
 
-        Document document;
-        Object source = hit.source();
-        if (source == null) {
-            document = Document.from(hitFieldsAsMap);
-        } else {
-            if (source instanceof EntityAsMap entityAsMap) {
-                document = Document.from(entityAsMap);
-            } else if (source instanceof JsonData jsonData) {
-                document = Document.from(jsonData.to(EntityAsMap.class));
-            } else {
+		Document document;
+		Object source = hit.source();
+		if (source == null) {
+			document = Document.from(hitFieldsAsMap);
+		} else {
+			if (source instanceof EntityAsMap entityAsMap) {
+				document = Document.from(entityAsMap);
+			} else if (source instanceof JsonData jsonData) {
+				document = Document.from(jsonData.to(EntityAsMap.class));
+			} else {
 
-                if (LOGGER.isWarnEnabled()) {
-                    LOGGER.warn(String.format("Cannot map from type " + source.getClass().getName()));
-                }
-                document = Document.create();
-            }
-        }
-        document.setIndex(hit.index());
-        document.setId(hit.id());
+				if (LOGGER.isWarnEnabled()) {
+					LOGGER.warn(String.format("Cannot map from type " + source.getClass().getName()));
+				}
+				document = Document.create();
+			}
+		}
+		document.setIndex(hit.index());
+		document.setId(hit.id());
 
-        if (hit.version() != null) {
-            document.setVersion(hit.version());
-        }
-        document.setSeqNo(hit.seqNo() != null && hit.seqNo() >= 0 ? hit.seqNo() : -2); // -2 was the default value in the
-        // old client
-        document.setPrimaryTerm(hit.primaryTerm() != null && hit.primaryTerm() > 0 ? hit.primaryTerm() : 0);
+		if (hit.version() != null) {
+			document.setVersion(hit.version());
+		}
+		document.setSeqNo(hit.seqNo() != null && hit.seqNo() >= 0 ? hit.seqNo() : -2); // -2 was the default value in the
+		// old client
+		document.setPrimaryTerm(hit.primaryTerm() != null && hit.primaryTerm() > 0 ? hit.primaryTerm() : 0);
 
-        float score = hit.score() != null ? hit.score().floatValue() : Float.NaN;
-        return new SearchDocumentAdapter(document, score, hit.sort().stream().map(TypeUtils::toObject).toArray(),
-                documentFields, highlightFields, innerHits, nestedMetaData, explanation, matchedQueries, hit.routing());
-    }
+		float score = hit.score() != null ? hit.score().floatValue() : Float.NaN;
+		return new SearchDocumentAdapter(document, score, hit.sort().stream().map(TypeUtils::toObject).toArray(),
+				documentFields, highlightFields, innerHits, nestedMetaData, explanation, matchedQueries, hit.routing());
+	}
 
-    public static SearchDocument from(CompletionSuggestOption<EntityAsMap> completionSuggestOption) {
+	public static SearchDocument from(CompletionSuggestOption<EntityAsMap> completionSuggestOption) {
 
-        Document document = completionSuggestOption.source() != null ? Document.from(completionSuggestOption.source())
-                : Document.create();
-        document.setIndex(completionSuggestOption.index());
+		Document document = completionSuggestOption.source() != null ? Document.from(completionSuggestOption.source())
+				: Document.create();
+		document.setIndex(completionSuggestOption.index());
 
-        if (completionSuggestOption.id() != null) {
-            document.setId(completionSuggestOption.id());
-        }
+		if (completionSuggestOption.id() != null) {
+			document.setId(completionSuggestOption.id());
+		}
 
-        float score = completionSuggestOption.score() != null ? completionSuggestOption.score().floatValue() : Float.NaN;
-        return new SearchDocumentAdapter(document, score, new Object[]{}, Collections.emptyMap(), Collections.emptyMap(),
-                Collections.emptyMap(), null, null, null, completionSuggestOption.routing());
-    }
+		float score = completionSuggestOption.score() != null ? completionSuggestOption.score().floatValue() : Float.NaN;
+		return new SearchDocumentAdapter(document, score, new Object[] {}, Collections.emptyMap(), Collections.emptyMap(),
+				Collections.emptyMap(), null, null, null, completionSuggestOption.routing());
+	}
 
-    @Nullable
-    private static Explanation from(co.elastic.clients.elasticsearch.core.explain.@Nullable Explanation explanation) {
+	@Nullable
+	private static Explanation from(co.elastic.clients.elasticsearch.core.explain.@Nullable Explanation explanation) {
 
-        if (explanation == null) {
-            return null;
-        }
-        List<Explanation> details = explanation.details().stream().map(DocumentAdapters::from).collect(Collectors.toList());
-        return new Explanation(true, (double) explanation.value(), explanation.description(), details);
-    }
+		if (explanation == null) {
+			return null;
+		}
+		List<Explanation> details = explanation.details().stream().map(DocumentAdapters::from).collect(Collectors.toList());
+		return new Explanation(true, (double) explanation.value(), explanation.description(), details);
+	}
 
-    private static Explanation from(ExplanationDetail explanationDetail) {
+	private static Explanation from(ExplanationDetail explanationDetail) {
 
-        List<Explanation> details = explanationDetail.details().stream().map(DocumentAdapters::from)
-                .collect(Collectors.toList());
-        return new Explanation(null, (double) explanationDetail.value(), explanationDetail.description(), details);
-    }
+		List<Explanation> details = explanationDetail.details().stream().map(DocumentAdapters::from)
+				.collect(Collectors.toList());
+		return new Explanation(null, (double) explanationDetail.value(), explanationDetail.description(), details);
+	}
 
-    @Nullable
-    private static NestedMetaData from(@Nullable NestedIdentity nestedIdentity) {
+	@Nullable
+	private static NestedMetaData from(@Nullable NestedIdentity nestedIdentity) {
 
-        if (nestedIdentity == null) {
-            return null;
-        }
+		if (nestedIdentity == null) {
+			return null;
+		}
 
-        NestedMetaData child = from(nestedIdentity.nested());
-        return NestedMetaData.of(nestedIdentity.field(), nestedIdentity.offset(), child);
-    }
+		NestedMetaData child = from(nestedIdentity.nested());
+		return NestedMetaData.of(nestedIdentity.field(), nestedIdentity.offset(), child);
+	}
 
-    /**
-     * Creates a {@link Document} from a {@link GetResponse} where the found document is contained as {@link EntityAsMap}.
-     *
-     * @param getResponse the response instance
-     * @return the Document
-     */
-    @Nullable
-    public static Document from(GetResult<EntityAsMap> getResponse) {
+	/**
+	 * Creates a {@link Document} from a {@link GetResponse} where the found document is contained as {@link EntityAsMap}.
+	 *
+	 * @param getResponse the response instance
+	 * @return the Document
+	 */
+	@Nullable
+	public static Document from(GetResult<EntityAsMap> getResponse) {
 
-        Assert.notNull(getResponse, "getResponse must not be null");
+		Assert.notNull(getResponse, "getResponse must not be null");
 
-        if (!getResponse.found()) {
-            return null;
-        }
+		if (!getResponse.found()) {
+			return null;
+		}
 
-        Document document = getResponse.source() != null ? Document.from(getResponse.source()) : Document.create();
-        document.setIndex(getResponse.index());
-        document.setId(getResponse.id());
+		Document document = getResponse.source() != null ? Document.from(getResponse.source()) : Document.create();
+		document.setIndex(getResponse.index());
+		document.setId(getResponse.id());
 
-        if (getResponse.version() != null) {
-            document.setVersion(getResponse.version());
-        }
+		if (getResponse.version() != null) {
+			document.setVersion(getResponse.version());
+		}
 
-        if (getResponse.seqNo() != null) {
-            document.setSeqNo(getResponse.seqNo());
-        }
+		if (getResponse.seqNo() != null) {
+			document.setSeqNo(getResponse.seqNo());
+		}
 
-        if (getResponse.primaryTerm() != null) {
-            document.setPrimaryTerm(getResponse.primaryTerm());
-        }
+		if (getResponse.primaryTerm() != null) {
+			document.setPrimaryTerm(getResponse.primaryTerm());
+		}
 
-        return document;
-    }
+		return document;
+	}
 
-    /**
-     * Creates a list of {@link MultiGetItem}s from a {@link MgetResponse} where the data is contained as
-     * {@link EntityAsMap} instances.
-     *
-     * @param mgetResponse the response instance
-     * @return list of multiget items
-     */
-    public static List<MultiGetItem<Document>> from(MgetResponse<EntityAsMap> mgetResponse) {
+	/**
+	 * Creates a list of {@link MultiGetItem}s from a {@link MgetResponse} where the data is contained as
+	 * {@link EntityAsMap} instances.
+	 *
+	 * @param mgetResponse the response instance
+	 * @return list of multiget items
+	 */
+	public static List<MultiGetItem<Document>> from(MgetResponse<EntityAsMap> mgetResponse) {
 
-        Assert.notNull(mgetResponse, "mgetResponse must not be null");
+		Assert.notNull(mgetResponse, "mgetResponse must not be null");
 
-        return mgetResponse.docs().stream() //
-                .map(itemResponse -> MultiGetItem.of( //
-                        itemResponse.isFailure() ? null : from(itemResponse.result()), //
-                        ResponseConverter.getFailure(itemResponse)))
-                .collect(Collectors.toList());
-    }
+		return mgetResponse.docs().stream() //
+				.map(itemResponse -> MultiGetItem.of( //
+						itemResponse.isFailure() ? null : from(itemResponse.result()), //
+						ResponseConverter.getFailure(itemResponse)))
+				.collect(Collectors.toList());
+	}
 }

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022-2025 the original author or authors.
+ * Copyright 2022-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -17,12 +17,14 @@ package org.springframework.data.elasticsearch.client.elc;
 
 import co.elastic.clients.elasticsearch.ElasticsearchClient;
 import co.elastic.clients.json.JsonpMapper;
-import co.elastic.clients.json.jackson.JacksonJsonpMapper;
+import co.elastic.clients.json.jackson.Jackson3JsonpMapper;
 import co.elastic.clients.transport.ElasticsearchTransport;
 import co.elastic.clients.transport.TransportOptions;
 import co.elastic.clients.transport.rest5_client.Rest5ClientOptions;
 import co.elastic.clients.transport.rest5_client.low_level.RequestOptions;
 import co.elastic.clients.transport.rest5_client.low_level.Rest5Client;
+import tools.jackson.databind.cfg.JsonNodeFeature;
+import tools.jackson.databind.json.JsonMapper;
 
 import org.springframework.context.annotation.Bean;
 import org.springframework.data.elasticsearch.client.ClientConfiguration;
@@ -32,10 +34,6 @@ import org.springframework.data.elasticsearch.core.ElasticsearchOperations;
 import org.springframework.data.elasticsearch.core.convert.ElasticsearchConverter;
 import org.springframework.util.Assert;
 
-import com.fasterxml.jackson.annotation.JsonInclude;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.SerializationFeature;
-
 /**
  * Base class for a @{@link org.springframework.context.annotation.Configuration} class to set up the Elasticsearch
  * connection using the Elasticsearch Client. This class exposes different parts of the setup as Spring beans. Deriving
@@ -128,10 +126,11 @@ public abstract class ElasticsearchConfiguration extends ElasticsearchConfigurat
 		// we need to create our own objectMapper that keeps null values in order to provide the storeNullValue
 		// functionality. The one Elasticsearch would provide removes the nulls. We remove unwanted nulls before they get
 		// into this mapper, so we can safely keep them here.
-		var objectMapper = (new ObjectMapper())
-				.configure(SerializationFeature.INDENT_OUTPUT, false)
-				.setSerializationInclusion(JsonInclude.Include.ALWAYS);
-		return new JacksonJsonpMapper(objectMapper);
+		JsonMapper jsonMapper = JsonMapper.builder()
+				.enable(JsonNodeFeature.WRITE_NULL_PROPERTIES)
+				.enable(JsonNodeFeature.READ_NULL_PROPERTIES)
+				.build();
+		return new Jackson3JsonpMapper(jsonMapper);
 	}
 
 	/**

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2021-2025 the original author or authors.
+ * Copyright 2021-present the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +47,7 @@ import com.fasterxml.jackson.databind.SerializationFeature;
  * @since 4.4
  * @deprecated since 6.0, use {@link ElasticsearchConfiguration}
  */
-@Deprecated(since = "6.0", forRemoval=true)
+@Deprecated(since = "6.0", forRemoval = true)
 public abstract class ElasticsearchLegacyRestClientConfiguration extends ElasticsearchConfigurationSupport {
 
 	/**

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

@@ -0,0 +1,99 @@
+/*
+ * Copyright 2026-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.elasticsearch.client.elc;
+
+import io.micrometer.common.docs.KeyName;
+import io.micrometer.observation.Observation;
+import io.micrometer.observation.ObservationConvention;
+import io.micrometer.observation.docs.ObservationDocumentation;
+
+/**
+ * {@link ObservationDocumentation} for Spring Data Elasticsearch template operations.
+ *
+ * @author maryantocinn
+ * @since 6.1
+ */
+public enum ElasticsearchObservation implements ObservationDocumentation {
+
+	/**
+	 * Timer created around a Spring Data Elasticsearch template operation.
+	 */
+	ELASTICSEARCH_COMMAND_OBSERVATION {
+		@Override
+		public String getName() {
+			return "spring.data.elasticsearch.command";
+		}
+
+		@Override
+		public Class<? extends ObservationConvention<? extends Observation.Context>> getDefaultConvention() {
+			return DefaultElasticsearchObservationConvention.class;
+		}
+
+		@Override
+		public KeyName[] getLowCardinalityKeyNames() {
+			return LowCardinalityKeyNames.values();
+		}
+
+		@Override
+		public KeyName[] getHighCardinalityKeyNames() {
+			return HighCardinalityKeyNames.values();
+		}
+	};
+
+	/**
+	 * Low cardinality key names for Spring Data Elasticsearch observations. These become metric dimensions and MUST be
+	 * present on every observation to satisfy backends like Prometheus that require consistent tag key sets.
+	 */
+	enum LowCardinalityKeyNames implements KeyName {
+
+		/**
+		 * The Spring Data operation being performed (e.g., save, search, delete, bulk).
+		 */
+		OPERATION {
+			@Override
+			public String asString() {
+				return "spring.data.operation";
+			}
+		},
+
+		/**
+		 * The target collection (index) name. Only present when the operation targets a specific index.
+		 */
+		COLLECTION {
+			@Override
+			public String asString() {
+				return "spring.data.collection";
+			}
+		}
+	}
+
+	/**
+	 * High cardinality key names for Spring Data Elasticsearch observations. These appear only on traces/spans, not on
+	 * metrics, because their values are unbounded or optional per operation.
+	 */
+	enum HighCardinalityKeyNames implements KeyName {
+
+		/**
+		 * The number of operations included in a batch (bulk) request. Only present for bulk operations.
+		 */
+		BATCH_SIZE {
+			@Override
+			public String asString() {
+				return "spring.data.batch.size";
+			}
+		}
+	}
+}

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

@@ -0,0 +1,81 @@
+/*
+ * Copyright 2026-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.springframework.data.elasticsearch.client.elc;
+
+import io.micrometer.observation.Observation;
+
+import org.jspecify.annotations.Nullable;
+import org.springframework.data.elasticsearch.core.mapping.IndexCoordinates;
+
+/**
+ * {@link Observation.Context} for Spring Data Elasticsearch operations. One instance is created per observed operation.
+ * It carries contextual data that conventions use to produce observation names and key-values.
+ *
+ * @author maryantocinn
+ * @since 6.1
+ */
+public class ElasticsearchObservationContext extends Observation.Context {
+
+	private final ElasticsearchOperationName operationName;
+	@Nullable private final IndexCoordinates indexCoordinates;
+	@Nullable private Integer batchSize;
+
+	public ElasticsearchObservationContext(ElasticsearchOperationName operationName,
+			@Nullable IndexCoordinates indexCoordinates) {
+		this.operationName = operationName;
+		this.indexCoordinates = indexCoordinates;
+	}
+
+	/**
+	 * @return the Spring Data operation being performed.
+	 */
+	public ElasticsearchOperationName getOperationName() {
+		return operationName;
+	}
+
+	/**
+	 * @return the target index coordinates, or {@literal null} if the operation is not index-specific.
+	 */
+	@Nullable
+	public IndexCoordinates getIndexCoordinates() {
+		return indexCoordinates;
+	}
+
+	/**
+	 * @return the comma-joined index name(s), or {@literal null} if no index coordinates are set.
+	 */
+	@Nullable
+	public String getIndexName() {
+		return indexCoordinates != null ? String.join(",", indexCoordinates.getIndexNames()) : null;
+	}
+
+	/**
+	 * @return the batch size, or {@literal null} if not a batch operation.
+	 */
+	@Nullable
+	public Integer getBatchSize() {
+		return batchSize;
+	}
+
+	/**
+	 * Set the number of operations included in a batch (bulk) request.
+	 *
+	 * @param batchSize the batch size, can be {@literal null}
+	 */
+	public void setBatchSize(@Nullable Integer batchSize) {
+		this.batchSize = batchSize;
+	}
+}