Ceph » rbd

After upgrading from 0.94.1 to 0.94.4 I am having issues starting SOME virtual guests with KVM. The following error is shown in libvirt logs:

librbd/LibrbdWriteback.cc: In function 'virtual ceph_tid_t librbd::LibrbdWriteback::write(const object_t&, const object_locator_t&, uint64_t, uint64_t, const SnapContext&, const bufferlist&, utime_t, uint64_t, __u32, Context*)' thread 7fe016ffd700 time 2015-10-21 13:23:53.002271
librbd/LibrbdWriteback.cc: 160: FAILED assert(m_ictx->owner_lock.is_locked())
ceph version 0.94.4 (95292699291242794510b39ffde3f4df67898d3a)
1: (()+0x17258b) [0x7fe03e69058b]
2: (()+0xa9573) [0x7fe03e5c7573]
3: (()+0x3a90ca) [0x7fe03e8c70ca]
4: (()+0x3b583d) [0x7fe03e8d383d]
5: (()+0x7212c) [0x7fe03e59012c]
6: (()+0x9590f) [0x7fe03e5b390f]
7: (()+0x969a3) [0x7fe03e5b49a3]
8: (()+0x4782a) [0x7fe03e56582a]
9: (()+0x56599) [0x7fe03e574599]
10: (()+0x7284e) [0x7fe03e59084e]
11: (()+0x162b7e) [0x7fe03e680b7e]
12: (()+0x163c10) [0x7fe03e681c10]
13: (()+0x8182) [0x7fe03a3e2182]
14: (clone()+0x6d) [0x7fe03a10f47d]
NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
terminate called after throwing an instance of 'ceph::FailedAssertion'

I am running Apache CloudStack with KVM and Ceph. This issue effects all client host servers and only virtual router guest vms and not anything else. Whenever a virtual router is created or started I have the above error.

I am running Ubuntu 12.04 (kernel 3.19.8-031908-generic ) on osd servers and Ubuntu 14.04 (3.18.22-031822-generic ) on client host servers.