Context load test fails with Spring Boot 2.6.1 and Spring Cloud 2021.0.0

[Alos]

Describe the bug
While running the contextLoads test Spring Cloud Kubernetes fails with the following:

Error creating bean with name 'kubernetesKubectlCreateProcessor': Unsatisfied dependency expressed through field 
'apiClient'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with
 name 'defaultApiClient' defined in class path resource 
[io/kubernetes/client/spring/extended/controller/config/KubernetesInformerAutoConfiguration.class]: Bean 
instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: 
Failed to instantiate [io.kubernetes.client.openapi.ApiClient]: Factory method 'defaultApiClient' threw exception;
 nested exception is java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "expiryObj" is null
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.resolveFieldValue(AutowiredAnnotationBeanPostProcessor.java:659)
...
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 
'defaultApiClient' defined in class path resource [io/kubernetes/client/spring/extended/controller/config/KubernetesInformerAutoConfiguration.class]:
 Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException:
 Failed to instantiate [io.kubernetes.client.openapi.ApiClient]: Factory method 'defaultApiClient' threw exception; 
nested exception is java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "expiryObj" is null
...
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [io.kubernetes.client.openapi.ApiClient]: 
Factory method 'defaultApiClient' threw exception; nested exception is java.lang.NullPointerException: 
Cannot invoke "Object.getClass()" because "expiryObj" is null
...
Caused by: java.lang.NullPointerException: Cannot invoke "Object.getClass()" because "expiryObj" is null
	at io.kubernetes.client.util.authenticators.GCPAuthenticator.isExpired(GCPAuthenticator.java:54)
	at io.kubernetes.client.util.KubeConfig.getAccessToken(KubeConfig.java:214)

Is there a way to tell Spring Cloud Kubernetes to not try to access the API and authenticate while running JUnit tests?

[Alos]

I tried adding

bootstrap.properties:

spring.cloud.kubernetes.discovery.enabled=false
spring.cloud.kubernetes.enabled=false

application.yaml:

spring:
  application:
    name: cat-service
  cloud:
    loadbalancer:
      ribbon:
        enabled: false
    gcp:
      datastore:
        emulator:
          port: 8182
          enabled: true
          consistency: 1
    kubernetes:
      enabled: false
      loadbalancer:
        enabled: false

Did not help

[Alos]

I've added a sample project you can look at:

https://github.com/Alos/SpringCloudKubernetesIssue934

[wind57]

I am on the phone typing this, but that kubectl processor looks very familiar, and we had a flag to disable it... Can you search in the closed recently issues? If not, I can look at this closer in the upcoming days

[Alos]

Let me look into closed issues and report back

[Alos]

I think its related to #927 but I'm not sure how to proceed to disable the flag on the current version.

[wind57]

Can't you set kubernetes.informer.enabled=false property? and your URL with the repo shows a 404

[ryanjbaxter]

Yes try setting kubernetes.informer.enabled=false its autoconfiguration from the underlying kubernetes client kicking in.

[Alos]

Yep, I tired this and I get a different error:

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with 
name 'kubernetesKubectlCreateProcessor': Unsatisfied dependency expressed through field 'apiClient'; 
nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying 
bean of type 'io.kubernetes.client.openapi.ApiClient' available: expected at least 1 bean which qualifies 
as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

[ryanjbaxter]

Try also setting kubernetes.manifests.enabled=false