Using KubernetesClient in Spring application

[tinystorm]

I define global client as a bean and using in application runtime.
If i didn't close the client explicitly when the application is killed or restarted, will there be a connection leak?

[manusa]

That depends on the underlying HttpClient you're using (OkHttp by default), but it's very likely.

Usually when declaring the KubernetesClient instance as a Bean, Spring should automatically take care of closing it, since it implements the the Closeable interface.

In any case, depending on how you're defining the Bean, you can use any of the following methods to hook to the application shutdown callbacks and explicitly call the KubernetesClient#close method:

• The Bean definition implements the DisposableBean interface (although I don't think you're defining the bean as a @Component)
• Using the @PreDestroy javax annotation in a method to close the KubernetesClient
• Using the @Bean annotation destroyMethod element to reference the close method.