Migrating to 6.1.x: ClassNotFoundException io.fabric8.kubernetes.model.jackson.UnmatchedFieldTypeModule in tests

[apupier]

I'm trying to migrate from 6.0.0 to 6.1.1.
My tests are no more passing with this kind of exception:

java.lang.NoClassDefFoundError: io/fabric8/kubernetes/model/jackson/UnmatchedFieldTypeModule
	at io.fabric8.kubernetes.client.utils.Serialization.<clinit>(Serialization.java:55)
	at io.fabric8.kubernetes.client.server.mock.KubernetesCrudDispatcher.<init>(KubernetesCrudDispatcher.java:68)
	at io.fabric8.kubernetes.client.server.mock.KubernetesMixedDispatcher.<init>(KubernetesMixedDispatcher.java:57)
	at io.fabric8.kubernetes.client.server.mock.KubernetesMixedDispatcher.<init>(KubernetesMixedDispatcher.java:50)
	at io.fabric8.kubernetes.client.server.mock.KubernetesMockServerExtension.initializeKubernetesClientAndMockServer(KubernetesMockServerExtension.java:100)
	at io.fabric8.kubernetes.client.server.mock.KubernetesMockServerExtension.setKubernetesClientAndMockServerFields(KubernetesMockServerExtension.java:145)
	at io.fabric8.kubernetes.client.server.mock.KubernetesMockServerExtension.beforeAll(KubernetesMockServerExtension.java:77)
	at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeBeforeAllCallbacks$12(ClassBasedTestDescriptor.java:395)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeBeforeAllCallbacks(ClassBasedTestDescriptor.java:395)
	at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:211)
	at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.before(ClassBasedTestDescriptor.java:84)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:148)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:35)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
	at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:54)
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:147)
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:127)
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:90)
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:55)
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:102)
	at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:54)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:114)
	at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:95)
	at org.junit.platform.launcher.core.DefaultLauncherSession$DelegatingLauncher.execute(DefaultLauncherSession.java:91)
	at org.junit.platform.launcher.core.SessionPerRequestLauncher.execute(SessionPerRequestLauncher.java:60)
	at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:98)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:40)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:529)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:756)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:452)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:210)
	Suppressed: java.lang.NullPointerException
		at io.fabric8.kubernetes.client.server.mock.KubernetesMockServerExtension.destroy(KubernetesMockServerExtension.java:109)
		at io.fabric8.kubernetes.client.server.mock.KubernetesMockServerExtension.afterAll(KubernetesMockServerExtension.java:67)
		at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeAfterAllCallbacks$18(ClassBasedTestDescriptor.java:461)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.lambda$invokeAfterAllCallbacks$19(ClassBasedTestDescriptor.java:461)
		at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
		at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.invokeAfterAllCallbacks(ClassBasedTestDescriptor.java:461)
		at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.after(ClassBasedTestDescriptor.java:235)
		at org.junit.jupiter.engine.descriptor.ClassBasedTestDescriptor.after(ClassBasedTestDescriptor.java:84)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:161)
		at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
		at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:161)
		... 34 more
Caused by: java.lang.ClassNotFoundException: io.fabric8.kubernetes.model.jackson.UnmatchedFieldTypeModule
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
	... 49 more

I migrated code to use non-deprecated API (EnableKubernetesMockClient instead of EnableKnativeMockClient and resource(item).create() instead of io.fabric8.kubernetes.client.dsl.ItemWritableOperation.create(T) ). (the error appears with the deprecated API and with the new API). See this draft Pull request to see the migrated code camel-tooling/camel-language-server#814

here are the 2 migrated test classes which are failing:

• https://github.com/apupier/camel-language-server/blob/dependabot/maven/kubernetes.client.version-6.1.1-fithub-discussion/src/test/java/com/github/cameltooling/lsp/internal/completion/CamelKubernetesServicesCompletionTest.java
• https://github.com/apupier/camel-language-server/blob/dependabot/maven/kubernetes.client.version-6.1.1-fithub-discussion/src/test/java/com/github/cameltooling/lsp/internal/completion/KNativeConnectedCompletionTest.java

Is it that I need to configure something else? But what?
is it related to #4206 ?

[apupier]

Asking questions always help to have more ideas :-)

So the thing is that I need to add the io.fabric8:kubernetes-model-common to the dependencies explicitily. I guess that before it was a transitive dependency of kubernetes-client or this class wasn't used.
Wondering why it is not provided as a transitive dependency

[manusa]

I had a similar problem in one of our dependent projects: eclipse-jkube/jkube-integration-tests#190.

The kubernetes-model-common is a transitive dependency of all of the kubernetes-model-XXX modules which are transitive to kubernetes-client-api and openshift-client-api.

This class, however, was moved to a different package and this might be causing issues in case you have other dependencies in your project that depend on a different version of the Fabric8 kubernetes-client.

In our case, I was able to solve it by configuring the kubernetes-client-bom in our dependencyManagement section: https://github.com/marcnuri-forks/jkube-integration-tests/blob/4f0787ff51ecb044ef02784628a70d9e44250a19/pom.xml#L148-L154

[apupier]

Ok, sounds it is the case for me too: