ceph mds crashing constantly : ceph_assert fail … prepare_new_inode

[Amit Handa <amit.handa@xxxxxxxxx>]

We are facing constant crash from ceph mds. We have installed mimic (v13.2.1).

mds: cephfs-1/1/1 up {0=node2=up:active(laggy or crashed)}

mds logs: https://pastebin.com/AWGMLRm0

we have followed the DR steps listed at

http://docs.ceph.com/docs/mimic/cephfs/disaster-recovery/

please help in resolving the errors :(

mds crash stacktrace

 ceph version 13.2.1 (5533ecdc0fda920179d7ad84e0aa65a127b20d77) mimic (stable)
 1: (ceph::__ceph_assert_fail(char const*, char const*, int, char const*)+0xff) [0x7f984fc3ee1f]
 2: (()+0x284fe7) [0x7f984fc3efe7]
 3: (()+0x2087fe) [0x5563e88537fe]
 4: (Server::prepare_new_inode(boost::intrusive_ptr<MDRequestImpl>&, CDir*, inodeno_t, unsigned int, file_layout_t*)+0xf37) [0x5563e87ce777]
 5: (Server::handle_client_openc(boost::intrusive_ptr<MDRequestImpl>&)+0xdb0) [0x5563e87d0bd0]
 6: (Server::handle_client_request(MClientRequest*)+0x49e) [0x5563e87d3c0e]
 7: (Server::dispatch(Message*)+0x2db) [0x5563e87d789b]
 8: (MDSRank::handle_deferrable_message(Message*)+0x434) [0x5563e87514b4]
 9: (MDSRank::_dispatch(Message*, bool)+0x63b) [0x5563e875db5b]
 10: (MDSRank::retry_dispatch(Message*)+0x12) [0x5563e875e302]
 11: (MDSInternalContextBase::complete(int)+0x67) [0x5563e89afb57]
 12: (MDSRank::_advance_queues()+0xd1) [0x5563e875cd51]
 13: (MDSRank::ProgressThread::entry()+0x43) [0x5563e875d3e3]
 14: (()+0x7e25) [0x7f984d869e25]
 15: (clone()+0x6d) [0x7f984c949bad]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.


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