Ceph » CephFS

Best I can tell it's just busted. The rollback object contains all the dentries and inodes, but on a slave it's entirely probable that most of them won't exist during replay due to the strict auth requirements. And it asserts to make sure it has them in the cache.

This will need testing and going over at some point, but should be regarded as fairly low priority right now (as it requires a [rare] rollback to coincide with a dying MDS).