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Cannot instantiate DefaultKubernetesClient due to NoSuchMethodError

See original GitHub issue

Describe the bug

When create DefaultKubernetesClient(), there is a java exception

Fabric8 Kubernetes Client version

5.9.0

Steps to reproduce

Create DefaultKubernetesClient

        MyKubernetesInfo info;
        Config config = new ConfigBuilder()
                .withMasterUrl(info.getUrl())
                .withOauthToken(info.getToken())
                .withDisableHostnameVerification(true)
                .withTrustCerts(true)
                .build();

        return new DefaultKubernetesClient(config);

See the exception

Expected behavior

DefaultKubernetesClient() should be instantiated like version 5.4.1

Runtime

Kubernetes (vanilla)

Kubernetes API Server version

other (please specify in additional context)

Environment

Linux

Fabric8 Kubernetes Client Logs

java.lang.NoSuchMethodError: 'java.lang.String io.fabric8.kubernetes.api.model.HasMetadata.getGroup(java.lang.Class)'
	at io.fabric8.kubernetes.client.dsl.base.ResourceDefinitionContext.fromResourceType(ResourceDefinitionContext.java:51) ~[kubernetes-client-5.9.0.jar:na]
	at io.fabric8.kubernetes.client.ResourceHandlerImpl.<init>(ResourceHandlerImpl.java:43) ~[kubernetes-client-5.9.0.jar:na]
	at io.fabric8.kubernetes.client.Handlers.register(Handlers.java:50) ~[kubernetes-client-5.9.0.jar:na]
	at io.fabric8.kubernetes.client.BaseKubernetesClient.<clinit>(BaseKubernetesClient.java:132) ~[kubernetes-client-5.9.0.jar:na]
	at MyPackage.getNewKubernetesClient(Fabric8KubernetesApiClientPool.java:70) ~[main/:na]

Additional context

Kubernetes API version: 1.18, 1.21 That code snippet worked at the lib version 5.4.1

Issue Analytics

State:
Created 2 years ago
Comments:5 (1 by maintainers)

Top GitHub Comments

1reaction

youngbo89commented, Dec 20, 2021

I found something… I think there is a conflict with Spring-Cloud

Without Spring cloud

In build.gradle:

dependencies {
	implementation 'com.fasterxml.jackson.core:jackson-core:2.12.3'
	implementation 'io.fabric8:kubernetes-client:5.7.0'
}

Result:

11:41:59 AM: Executing task 'MyTest.main()'...

> Task :compileJava
> Task :processResources UP-TO-DATE
> Task :classes

> Task :MyTest.main()

with spring-cloud configuration

In build.gradle:

ext {
	set('springCloudVersion', "2020.0.3")
}

dependencyManagement {
	imports {
		mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
	}
}

dependencies {
	implementation 'com.fasterxml.jackson.core:jackson-core:2.12.3'
	implementation 'io.fabric8:kubernetes-client:5.7.0'
}

Result:

Exception in thread "main" java.lang.NoSuchMethodError: 'java.lang.String io.fabric8.kubernetes.api.model.HasMetadata.getGroup(java.lang.Class)'
	at io.fabric8.kubernetes.client.dsl.base.ResourceDefinitionContext.fromResourceType(ResourceDefinitionContext.java:60)
	at io.fabric8.kubernetes.client.ResourceHandlerImpl.<init>(ResourceHandlerImpl.java:42)
	at io.fabric8.kubernetes.client.Handlers.register(Handlers.java:49)
	at io.fabric8.kubernetes.client.BaseKubernetesClient.<clinit>(BaseKubernetesClient.java:133)
	at com.samsung.sco.dso.cnf.monitoring.operation.MyTest.main(MyTest.java:7)

Execution failed for task ':MyTest.main()'.

Compatibility table

Just for creating test of DefaultKubernetesClient Object.

The result is depends on the version of spring-cloud and fabric8-kubernetes

version	Spring-Cloud-Version	Result With Spring-Cloud	Without Spring cloud
kubernetes-client-5.4.1	2020.0.3	O	O
kubernetes-client-5.6.0	2020.0.3	O	O
kubernetes-client-5.7.0	2020.0.3	X	O
kubernetes-client-5.8.0	2020.0.3	X	O
kubernetes-client-5.11.0	2020.0.3	X	O

0reactions

stale[bot]commented, Mar 20, 2022

This issue has been automatically marked as stale because it has not had any activity since 90 days. It will be closed if no further activity occurs within 7 days. Thank you for your contributions!