Ceph - OSD asserts with FAILED assert(!m_filestore_fail_eio || r != -5)

Issue

• Ceph OSD asserts with FAILED assert(!m_filestore_fail_eio || r != -5)

2015-12-15 01:08:45.190418 7fb08650e700 -1 os/FileStore.cc: In function 'int FileStore::lfn_find(const ghobject_t&, const Index&, IndexedPath*)' thread 7fb08650e700 time 2015-12-15 01:08:45.175487
os/FileStore.cc: 179: FAILED assert(!m_filestore_fail_eio || r != -5)

 ceph version 0.94.5 (9764da52395923e0b32908d83a9f7304401fee43)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0x7f) [0xb1a76f]
 2: (FileStore::lfn_find(ghobject_t const&, Index const&, std::tr1::shared_ptr<CollectionIndex::Path>*)+0xad) [0x8b009d]
 3: (FileStore::lfn_stat(coll_t, ghobject_t const&, stat*)+0xde) [0x8b339e]
 4: (FileStore::stat(coll_t, ghobject_t const&, stat*, bool)+0x57) [0x8bc3f7]
 5: (PGBackend::be_scan_list(ScrubMap&, std::vector<hobject_t, std::allocator<hobject_t> > const&, bool, unsigned int, ThreadPool::TPHandle&)+0x13e) [0x897c1e]
 6: (PG::build_scrub_map_chunk(ScrubMap&, hobject_t, hobject_t, bool, unsigned int, ThreadPool::TPHandle&)+0x1f7) [0x7ac7a7]
 7: (PG::replica_scrub(MOSDRepScrub*, ThreadPool::TPHandle&)+0x45a) [0x7ace5a]
 8: (OSD::RepScrubWQ::_process(MOSDRepScrub*, ThreadPool::TPHandle&)+0xfa) [0x6ba35a]
 9: (ThreadPool::worker(ThreadPool::WorkThread*)+0x48e) [0xb0964e]
 10: (ThreadPool::WorkThread::entry()+0x10) [0xb0c4b0]
 11: (()+0x7e9a) [0x7fb0a530ce9a]
 12: (clone()+0x6d) [0x7fb0a3ffe2ed]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.