Cached clients return incomplete object lists for paginated list calls

[chhsia0]

Today, the cache reader does not support paginated list calls:

controller-runtime/pkg/cache/internal/cache_reader.go

Line 116 in aea2e32

return fmt.Errorf("continue list option is not supported by the cache")

However, in the initial list call, the cache reader does not return any signal to its callers to indicate whether the returned object list is incomplete:

controller-runtime/pkg/cache/internal/cache_reader.go

Line 149 in aea2e32

break

As a result, callers may have erroneous behaviors if it is assumed that the resulting list is complete. Till the technical challenge in #532 is resolved, it seems an error should be returned if there are too many objects.

Thoughts?

[akutz]

If I am reading this correctly, does this mean there is currently no point in using pagination with a caching client?

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[k8s-triage-robot]

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