ceph version 0.47.2 (commit:8bf9fde89bd6ebc4b0645b2fe02dadb1c17ad372)
 1: /usr/bin/ceph-osd() [0x6eb32a]
 2: (()+0xfcb0) [0x7f160bfa0cb0]
 3: (gsignal()+0x35) [0x7f160a491445]
 4: (abort()+0x17b) [0x7f160a494bab]
 5: (__gnu_cxx::__verbose_terminate_handler()+0x11d) [0x7f160addf69d]
 6: (()+0xb5846) [0x7f160addd846]
 7: (()+0xb5873) [0x7f160addd873]
 8: (()+0xb596e) [0x7f160addd96e]
 9: (std::__throw_length_error(char const*)+0x57) [0x7f160ad8a907]
 10: (()+0x9eaa2) [0x7f160adc6aa2]
 11: (char* std::string::_S_construct<char const*>(char const*, char const*, std::allocator<char> const&, std::forward_iterator_tag)+0x35) [0x7f160adc8495]
 12: (std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string(char const*, unsigned long, std::allocator<char> const&)+0x1d) [0x7f160adc861d]
 13: (leveldb::InternalKeyComparator::FindShortestSeparator(std::string*, leveldb::Slice const&) const+0x47) [0x6d1ce7]
 14: (leveldb::TableBuilder::Add(leveldb::Slice const&, leveldb::Slice const&)+0x92) [0x6e0712]
 15: (leveldb::DBImpl::DoCompactionWork(leveldb::DBImpl::CompactionState*)+0x482) [0x6cc552]
 16: (leveldb::DBImpl::BackgroundCompaction()+0x2b0) [0x6ccd50]
 17: (leveldb::DBImpl::BackgroundCall()+0x68) [0x6cd7f8]
 18: /usr/bin/ceph-osd() [0x6e679f]
 19: (()+0x7e9a) [0x7f160bf98e9a]
 20: (clone()+0x6d) [0x7f160a54d4bd]