Output-caching can return stale results

[sebastienros]

When the server returns an error, or a lock is acquired on this resource, the cache can return a stale entry depending on a timeout (grace period).
When an entry is stale and refreshed, if "If-Modified-Since" or "If-None-Match" are set, and the content is identical a 304 will be returned and the cached entry refreshed.

[ghost]

We've moved this issue to the Backlog milestone. This means that it is not going to be worked on for the coming release. We will reassess the backlog following the current release and consider this item at that time. To learn more about our issue management process and to have better expectation regarding different types of issues you can read our Triage Process.