SharedIndexInformer is not shared?

[paulzhn]

I noticed that sharedIndexInformerFor(Class<T> apiTypeClass, long resyncPeriodInMillis) seems to create a new SharedIndexInformer instance every time, even for the same apiTypeClass.

This is different from Kubernetes client-go's SharedInformerFactory, which returns a single, shared informer instance.

Question: Is this repeated creation of new informer instances intentional? If so, what is the design rationale?

[shawkins]

Question: Is this repeated creation of new informer instances intentional?

That appears to be how it was always implemented, and the javadoc does indicate that an instance will be constructed. There is a separate method for getting an existing one.

If so, what is the design rationale?

Other than some removal of deprecated methods, there hasn't been much attention paid to the SharedInformerFactory class over the years. It's probably best to just deprecate the whole thing. See #7322