metadata: Invalidate cache if unreadable and not updating (#10844)
metadata: Invalidate cache if unreadable and not updating (#10844)

If a scanning server shuts down unexpectedly we may have "successful" caches that are incomplete on a set.

In this case mark the cache with an error so it will no longer be handed out.
balamurugana/minio,vadmeste/minio,balamurugana/minio,NitishT/minio,krisis/minio,NitishT/minio,donatello/minio,vadmeste/minio,krisis/minio,NitishT/minio,NitishT/minio,donatello/minio,minio/minio,minio/minio