Bug: ClassNotFoundException: io.fabric8.kubernetes.model.annotation.Group in 5.12.2 version

Is your task related to a problem? Please describe

Im using io.fabric8:kubernetes-client:5.12.2 and on running a simple client creation code: KubernetesClient client = new DefaultKubernetesClient();

im getting the following errors: Caused by: java.lang.ClassNotFoundException: io.fabric8.kubernetes.model.annotation.Group at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?]

So what can be done to fix this?

Describe the solution you’d like

We should not be seeing the ClassNotFoundException. Some regression has happened while releasing a new version

Describe alternatives you’ve considered

If i downgrade to the version 4.12.0 then i dont see this error anymore.

Additional context

No response

[rktechie]

CMD: ./gradlew operatorprovider:dependencyInsight --dependency kubernetes-model-common

Seems like fabric8 is itself downgrading it. You can see the dependency tree below:

io.fabric8:kubernetes-model-common:4.4.1 (selected by rule) variant “compile” [ org.gradle.status = release (not requested) org.gradle.usage = java-api org.gradle.category = library (not requested)

  Requested attributes not found in the selected variant:
     org.gradle.dependency.bundling = external
     org.gradle.jvm.version         = 11

]

io.fabric8:kubernetes-model-common:5.12.2 -> 4.4.1 ±-- io.fabric8:kubernetes-model-admissionregistration:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 | -– compileClasspath ±-- io.fabric8:kubernetes-model-apiextensions:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-apps:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-autoscaling:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-batch:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-certificates:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-coordination:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-core:5.12.2 | ±-- io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-rbac:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-admissionregistration:5.12.2 () | ±-- io.fabric8:kubernetes-model-apps:5.12.2 () | ±-- io.fabric8:kubernetes-model-autoscaling:5.12.2 () | ±-- io.fabric8:kubernetes-model-apiextensions:5.12.2 () | ±-- io.fabric8:kubernetes-model-batch:5.12.2 () | ±-- io.fabric8:kubernetes-model-certificates:5.12.2 () | ±-- io.fabric8:kubernetes-model-coordination:5.12.2 () | ±-- io.fabric8:kubernetes-model-discovery:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-events:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-extensions:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-flowcontrol:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-networking:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-metrics:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-policy:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-scheduling:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | ±-- io.fabric8:kubernetes-model-storageclass:5.12.2 | | -– io.fabric8:kubernetes-client:5.12.2 () | -– io.fabric8:kubernetes-model-node:5.12.2 | -– io.fabric8:kubernetes-client:5.12.2 () ±-- io.fabric8:kubernetes-model-discovery:5.12.2 () ±-- io.fabric8:kubernetes-model-events:5.12.2 () ±-- io.fabric8:kubernetes-model-extensions:5.12.2 () ±-- io.fabric8:kubernetes-model-flowcontrol:5.12.2 () ±-- io.fabric8:kubernetes-model-metrics:5.12.2 () ±-- io.fabric8:kubernetes-model-networking:5.12.2 () ±-- io.fabric8:kubernetes-model-node:5.12.2 () ±-- io.fabric8:kubernetes-model-policy:5.12.2 () ±-- io.fabric8:kubernetes-model-rbac:5.12.2 () ±-- io.fabric8:kubernetes-model-scheduling:5.12.2 () -– io.fabric8:kubernetes-model-storageclass:5.12.2 ()

(*) - dependencies omitted (listed previously)

[shawkins]

Should be the same issue as #4503 - some other unshown dependency is bring in a conflicting version of the fabric8 kubernetes client. That issue and the faq have been updated with how to handle this situation.