Hi Stefan, looks like bluefs allocator is unable to provide additional space for bluefs log. The root cause might be lack of free space and/or high space fragmentation. Prior log lines and disk configuration (e.g. ceph-bluestore-tool bluefs-bdev-sizes) might be helpful for further analysis. Thanks, Igor On 7/6/2020 1:25 PM, Stefan Kooman wrote: > Hi List, > > On of our clusters there are a couple of OSDs that keep crashing: > >> /build/ceph-13.2.8/src/os/bluestore/BlueFS.cc: 1576: FAILED assert(r >> == 0) >> >>  ceph version 13.2.8 (5579a94fafbc1f9cc913a0f5d362953a5d9c3ae0) mimic >> (stable) >>  1: (ceph::__ceph_assert_fail(char const*, char const*, int, char >> const*)+0x14e) [0x7fbae37bbf1e] >>  2: (()+0x2fc0a7) [0x7fbae37bc0a7] >>  3: (BlueFS::_flush_and_sync_log(std::unique_lock<std::mutex>&, >> unsigned long, unsigned long)+0x13ed) [0xc660dd] >>  4: (BlueFS::_fsync(BlueFS::FileWriter*, >> std::unique_lock<std::mutex>&)+0x8a) [0xc667fa] >>  5: (BlueRocksWritableFile::Sync()+0x63) [0xc81b13] >>  6: (rocksdb::WritableFileWriter::SyncInternal(bool)+0x2a9) [0xe45c69] >>  7: (rocksdb::WritableFileWriter::Sync(bool)+0x21e) [0xe47ece] >>  8: (rocksdb::BuildTable(std::__cxx11::basic_string<char, >> std::char_traits<char>, std::allocator<char> > const&, rocksdb::Env*, >> rocksdb::ImmutableCFOptions const&, rocksdb::MutableCFOptions const&, >> rocksdb::EnvOptions const&, rocksdb::TableCache*, >> rocksdb::InternalIterator*, >> std::unique_ptr<rocksdb::InternalIterator, >> std::default_delete<rocksdb::InternalIterator> >, >> rocksdb::FileMetaData*, rocksdb::InternalKeyComparator const&, >> std::vector<std::unique_ptr<rocksdb::IntTblPropCollectorFactory, >> std::default_delete<rocksdb::IntTblPropCollectorFactory> >, >> std::allocator<std::unique_ptr<rocksdb::IntTblPropCollectorFactory, >> std::default_delete<rocksdb::IntTblPropCollectorFactory> > > > >> const*, unsigned int, std::__cxx11::basic_string<char, >> std::char_traits<char>, std::allocator<char> > const&, >> std::vector<unsigned long, std::allocator<unsigned long> >, unsigned >> long, rocksdb::SnapshotChecker*, rocksdb::CompressionType, >> rocksdb::CompressionOptions const&, bool, rocksdb::InternalStats*, roc > ksdb::TableFileCreationReason, rocksdb::EventLogger*, int, > rocksdb::Env::IOPriority, rocksdb::TableProperties*, int, unsigned > long, unsigned long, rocksdb::Env::WriteLifeTimeHint)+0x1e14) [0xe72af4] >>  9: (rocksdb::DBImpl::WriteLevel0TableForRecovery(int, >> rocksdb::ColumnFamilyData*, rocksdb::MemTable*, >> rocksdb::VersionEdit*)+0xcb7) [0xcf5117] >>  10: (rocksdb::DBImpl::RecoverLogFiles(std::vector<unsigned long, >> std::allocator<unsigned long> > const&, unsigned long*, bool)+0x1a0a) >> [0xcf742a] >>  11: >> (rocksdb::DBImpl::Recover(std::vector<rocksdb::ColumnFamilyDescriptor, >> std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, bool, bool, >> bool)+0x5d4) [0xcf7fd4] >> 12: (rocksdb::DBImpl::Open(rocksdb::DBOptions const&, >> std::__cxx11::basic_string<char, std::char_traits<char>, >> std::allocator<char> > const&, >> std::vector<rocksdb::ColumnFamilyDescriptor, >> std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, >> std::vector<rocksdb::ColumnFamilyHandle*, >> std::allocator<rocksdb::ColumnFamilyHandle*> >*, rocksdb::DB**, >> bool)+0x6ab) [0xcf929b] >>  13: (rocksdb::DB::Open(rocksdb::DBOptions const&, >> std::__cxx11::basic_string<char, std::char_traits<char>, >> std::allocator<char> > const&, >> std::vector<rocksdb::ColumnFamilyDescriptor, >> std::allocator<rocksdb::ColumnFamilyDescriptor> > const&, >> std::vector<rocksdb::ColumnFamilyHandle*, >> std::allocator<rocksdb::ColumnFamilyHandle*> >*, rocksdb::DB**)+0x22) >> [0xcfab92] >>  14: (RocksDBStore::do_open(std::ostream&, bool, >> std::vector<KeyValueDB::ColumnFamily, >> std::allocator<KeyValueDB::ColumnFamily> > const*)+0x174a) [0xc0136a] >>  15: (BlueStore::_open_db(bool, bool)+0xd8f) [0xb8cc4f] >>  16: (BlueStore::_mount(bool, bool)+0x4cf) [0xbbcd4f] >>  17: (OSD::init()+0x33d) [0x751f5d] >>  18: (main()+0x24b0) [0x643560] >>  19: (__libc_start_main()+0xf0) [0x7fbae1762830] >>  20: (_start()+0x29) [0x70d9f9] > > > Any hints on what can be the cause of this? > > Gr. Stefan >