Ceph » RADOS

we encounter this fault while using cephfs, it seems be similar to this issue http://tracker.ceph.com/issues/17645

```c++
2018-03-07 17:36:55.753543 7f82b0edc700 0 bad trim to 279'55156 when complete_to is 272'54099 on log((272'54097,355'65157], crt=355'65
157)
2018-03-07 17:37:19.439095 7f82af6d9700 0 bad trim to 279'55405 when complete_to is 272'54127 on log((272'54126,355'65406], crt=355'65
406)
2018-03-07 17:37:31.075067 7f82b1ede700 0 bad trim to 279'55505 when complete_to is 272'54169 on log((279'55405,355'65506], crt=355'65
506)
2018-03-07 17:37:36.870389 7f82b0edc700 0 bad trim to 279'55283 when complete_to is 272'54028 on log((269'54005,355'65284], crt=355'65
284)
2018-03-07 17:37:39.831625 7f82afeda700 0 bad trim to 279'55008 when complete_to is 272'53742 on log((272'53741,355'65009], crt=355'65
009)
2018-03-07 17:37:45.275853 7f82b26df700 -1 ** Caught signal (Segmentation fault) *
in thread 7f82b26df700 thread_name:tp_osd_tp

ceph version 12.2.2-10 (748f9de018390b7e4a53e94c74a6261333298d09) luminous (stable)
 1: (()+0xa51f31) [0x7f82e72f6f31]
 2: (()+0xf370) [0x7f82e453a370]
 3: (PrimaryLogPG::recover_got(hobject_t, eversion_t)+0x266) [0x7f82e6efd786]
 4: (PrimaryLogPG::on_local_recover(hobject_t const&, ObjectRecoveryInfo const&, std::shared_ptr<ObjectContext>, bool, ObjectStore::Tran
saction*)+0x2a4) [0x7f82e6f0a3b4]
 5: (ReplicatedBackend::handle_push(pg_shard_t, PushOp const&, PushReplyOp*, ObjectStore::Transaction*)+0x2e2) [0x7f82e707bf82]
 6: (ReplicatedBackend::_do_push(boost::intrusive_ptr<OpRequest>)+0x194) [0x7f82e707c224]
 7: (ReplicatedBackend::_handle_message(boost::intrusive_ptr<OpRequest>)+0x2f1) [0x7f82e708ad41]
 8: (PGBackend::handle_message(boost::intrusive_ptr<OpRequest>)+0x50) [0x7f82e6fad470]
 9: (PrimaryLogPG::do_request(boost::intrusive_ptr<OpRequest>&, ThreadPool::TPHandle&)+0x5ae) [0x7f82e6f1c60e]
 10: (OSD::dequeue_op(boost::intrusive_ptr<PG>, boost::intrusive_ptr<OpRequest>, ThreadPool::TPHandle&)+0x42e) [0x7f82e6d82b8e]
 11: (PGQueueable::RunVis::operator()(boost::intrusive_ptr<OpRequest> const&)+0x57) [0x7f82e701e937]
 12: (OSD::ShardedOpWQ::_process(unsigned int, ceph::heartbeat_handle_d*)+0x1282) [0x7f82e6db4fd2]
 13: (ShardedThreadPool::shardedthreadpool_worker(unsigned int)+0x839) [0x7f82e733b5b9]
 14: (ShardedThreadPool::WorkThreadSharded::entry()+0x10) [0x7f82e733d550]
 15: (()+0x7dc5) [0x7f82e4532dc5]
 16: (clone()+0x6d) [0x7f82e362876d]
 NOTE: a copy of the executable, or `objdump -rdS <executable>` is needed to interpret this.
```