Require JDK 23 for building (but keep the Java 17 baseline)

Author: marko-bekhta

.github/workflows/ci-report.yml

@@ -25,7 +25,7 @@ jobs:
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           distribution: 'temurin'
-          java-version: '21'
+          java-version: '23'
 
       - name: Generate cache key
         id: cache-key

.github/workflows/ci.yml

@@ -33,7 +33,7 @@ jobs:
   build:
     permissions:
       contents: read
-    name: OpenJDK 21 - ${{matrix.rdbms}}
+    name: OpenJDK 23 - ${{matrix.rdbms}}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
@@ -63,11 +63,11 @@ jobs:
         env:
           RDBMS: ${{ matrix.rdbms }}
         run: ci/database-start.sh
-      - name: Set up Java 21
+      - name: Set up Java 23
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           distribution: 'temurin'
-          java-version: '21'
+          java-version: '23'
 
       - name: Generate cache key
         id: cache-key
@@ -270,11 +270,11 @@ jobs:
           persist-credentials: false
       - name: Reclaim disk space and sanitize user home
         run: .github/ci-prerequisites-atlas.sh
-      - name: Set up Java 21
+      - name: Set up Java 23
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           distribution: 'temurin'
-          java-version: '21'
+          java-version: '23'
 
       - name: Generate cache key
         id: cache-key

.github/workflows/codeql.yml

@@ -40,7 +40,7 @@ jobs:
         uses: actions/setup-java@c5195efecf7bdfc987ee8bae7a71cb8b11521c00 # v4.7.1
         with:
           distribution: 'temurin'
-          java-version: '21'
+          java-version: '23'
 
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

Jenkinsfile

@@ -14,7 +14,7 @@ import org.jenkinsci.plugins.workflow.support.steps.build.RunWrapper
 @Library('hibernate-jenkins-pipeline-helpers') _
 import org.hibernate.jenkins.pipeline.helpers.job.JobHelper
 
-@Field final String DEFAULT_JDK_VERSION = '21'
+@Field final String DEFAULT_JDK_VERSION = '23'
 @Field final String DEFAULT_JDK_TOOL = "OpenJDK ${DEFAULT_JDK_VERSION} Latest"
 @Field final String NODE_PATTERN_BASE = 'Worker&&Containers'
 @Field List<BuildEnvironment> environments
@@ -42,7 +42,8 @@ stage('Configure') {
 		new BuildEnvironment( node: 's390x' ),
 		// We generally build with JDK 21, but our baseline is Java 17, so we test with JDK 17, to be sure everything works.
 		// Here we even compile the main code with JDK 17, to be sure no JDK 18+ classes are depended on.
-		new BuildEnvironment( mainJdkVersion: '17', testJdkVersion: '17' ),
+        new BuildEnvironment( mainJdkVersion: '17', testJdkVersion: '17' ),
+        new BuildEnvironment( mainJdkVersion: '21', testJdkVersion: '21' ),
 		// We want to enable preview features when testing newer builds of OpenJDK:
 		// even if we don't use these features, just enabling them can cause side effects
 		// and it's useful to test that.

README.adoc

@@ -18,7 +18,7 @@ See link:MAINTAINERS.md#ci[MAINTAINERS.md] for information about CI.
 
 == Building from sources
 
-The build requires at least JDK 21, and produces Java 17 bytecode.
+The build requires at least JDK 23, and produces Java 17 bytecode.
 
 Hibernate uses https://gradle.org[Gradle] as its build tool. See the _Gradle Primer_ section below if you are new to
 Gradle.

ci/jpa-3.2-tck.Jenkinsfile

@@ -22,7 +22,7 @@ else {
 pipeline {
     agent none
     tools {
-        jdk 'OpenJDK 21 Latest'
+        jdk 'OpenJDK 23 Latest'
     }
     options {
   		rateLimitBuilds(throttle: [count: throttleCount, durationName: 'day', userBoost: true])

ci/release/Jenkinsfile

@@ -70,7 +70,7 @@ pipeline {
 		cron('0 0 * * 0')
 	}
 	tools {
-		jdk 'OpenJDK 21 Latest'
+		jdk 'OpenJDK 23 Latest'
 	}
 	options {
 		buildDiscarder logRotator(daysToKeepStr: '30', numToKeepStr: '10')

ci/snapshot-publish.Jenkinsfile

@@ -23,7 +23,7 @@ pipeline {
         label 'Release'
     }
     tools {
-        jdk 'OpenJDK 21 Latest'
+        jdk 'OpenJDK 23 Latest'
     }
     options {
   		rateLimitBuilds(throttle: [count: 1, durationName: 'hour', userBoost: true])

nightly.Jenkinsfile

@@ -14,7 +14,7 @@ import org.jenkinsci.plugins.workflow.support.steps.build.RunWrapper
 @Library('hibernate-jenkins-pipeline-helpers') _
 import org.hibernate.jenkins.pipeline.helpers.job.JobHelper
 
-@Field final String DEFAULT_JDK_VERSION = '21'
+@Field final String DEFAULT_JDK_VERSION = '23'
 @Field final String DEFAULT_JDK_TOOL = "OpenJDK ${DEFAULT_JDK_VERSION} Latest"
 @Field final String NODE_PATTERN_BASE = 'Worker&&Containers'
 @Field List<BuildEnvironment> environments