Java 21 Test Compatibility

 - Add Linux and Windows Java 21 PR test jobs
 - Remove Windows Java 11 & 17 PR test jobs

azure-pipelines.yml

@@ -46,23 +46,22 @@ jobs:
 
 - template: build-templates/gradle-common.yml@templates
   parameters:
-    vmImage: 'windows-latest'
     jdkVersion: '1.8'
-    jobName: 'WindowsJava8'
+    options: '-PtestVM=java21Home'
+    jobName: 'LinuxJava21'
     gradleTasks: 'check -x dependencyCheckAggregate'
 
 - template: build-templates/gradle-common.yml@templates
   parameters:
     vmImage: 'windows-latest'
     jdkVersion: '1.8'
-    options: '-PtestVM=java11Home'
-    jobName: 'WindowsJava11'
+    jobName: 'WindowsJava8'
     gradleTasks: 'check -x dependencyCheckAggregate'
 
 - template: build-templates/gradle-common.yml@templates
   parameters:
     vmImage: 'windows-latest'
     jdkVersion: '1.8'
-    options: '-PtestVM=java17Home'
-    jobName: 'WindowsJava17'
+    options: '-PtestVM=java21Home'
+    jobName: 'WindowsJava21'
     gradleTasks: 'check -x dependencyCheckAggregate'

build-logic/src/main/java/org/ehcache/build/conventions/JacocoConvention.java

@@ -15,7 +15,7 @@ public void apply(Project project) {
     project.getPlugins().apply(JacocoPlugin.class);
 
     project.getExtensions().configure(JacocoPluginExtension.class, jacoco -> {
-      jacoco.setToolVersion("0.8.8");
+      jacoco.setToolVersion("0.8.11");
     });
 
     project.getTasks().withType(JacocoReport.class).configureEach(jacocoReport -> {

clustered/ehcache-client/src/test/java/org/ehcache/clustered/common/internal/store/operations/LazyValueHolderTest.java

@@ -42,7 +42,7 @@ public class LazyValueHolderTest {
   @Test
   public void testGetValueDecodeOnlyOnce() throws Exception {
     Date date = mock(Date.class);
-    ByteBuffer buffer = mock(ByteBuffer.class);
+    ByteBuffer buffer = ByteBuffer.allocate(0);
     doReturn(date).when(serializer).read(buffer);
 
     LazyValueHolder<Date> valueHolder = new LazyValueHolder<>(buffer, serializer);
@@ -56,7 +56,7 @@ public void testGetValueDecodeOnlyOnce() throws Exception {
   @Test
   public void testEncodeEncodesOnlyOnce() throws Exception {
     Date date = mock(Date.class);
-    ByteBuffer buffer = mock(ByteBuffer.class);
+    ByteBuffer buffer = ByteBuffer.allocate(0);
     doReturn(buffer).when(serializer).serialize(date);
 
     LazyValueHolder<Date> valueHolder = new LazyValueHolder<>(date);

ehcache-impl/src/test/java/org/ehcache/impl/internal/copy/SerializingCopierTest.java

@@ -36,7 +36,7 @@ public class SerializingCopierTest {
   public void testCopy() throws Exception {
     Serializer<String> serializer = uncheckedGenericMock(Serializer.class);
     String in = new String("foo");
-    ByteBuffer buff = mock(ByteBuffer.class);
+    ByteBuffer buff = ByteBuffer.allocate(0);
     when(serializer.serialize(in)).thenReturn(buff);
     when(serializer.read(buff)).thenReturn(new String("foo"));
 

ehcache-xml/build.gradle

@@ -153,6 +153,11 @@ tasks.register('lowerBoundTest', Test) {
   classpath -= configurations.testRuntimeClasspath
   //add the classpath we want
   classpath += configurations.lowerBoundTestRuntimeClasspath
+
+  if (testJava.javaVersion.isJava9Compatible()) {
+    // Older JAXB versions do reflection on java.lang.ClassLoader
+    jvmArgs += '--add-opens=java.base/java.lang=ALL-UNNAMED'
+  }
 }
 
 tasks.register('jakartaTest', Test) {