Current Behavior

inconsistent response headers for in-memory and on-disk cache when the cache expires.

• for on disk strategy, the header shows Apisix-Cache-Status: EXPIRED
• for in memory strategy, the headers shows Apisix-Cache-Status: MISS

Expected Behavior

Same header value for both caching strategies when the cache expires.

Steps to Reproduce

disk based caching

1. Enable proxy-cache on a route and configure it to use disk based caching
2. Send a few requests and observe caching in effect
3. Wait for the cache to expire after TTL and send another request, to observe Apisix-Cache-Status: EXPIRED header

in memory caching

1. Enable proxy-cache on a route and configure it to use disk based caching
2. Send a few requests and observe caching in effect
3. Wait for the cache to expire after TTL and send another request, to observe Apisix-Cache-Status: MISS header

Environment

• APISIX version (run apisix version): 3.8.0