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  1. MariaDB Server
  2. MDEV-27175

Mariadb wsrep Exception while mapping writeset

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Incomplete
    • Affects Version/s: 10.5.13, 10.5
    • Fix Version/s: N/A
    • Component/s: wsrep
    • Labels:
      None

      Description

      We've seen one node unable to join back to cluster because of error

      2021/12/06 10:19:09 Peer list updated
      was []
      now [mysql-0.mysql.default.svc.cluster.local mysql-1.mysql.default.svc.cluster.local mysql-2.mysql.default.svc.cluster.local]
      2021/12/06 10:19:09 execing: /opt/galera/on-start.sh with stdin: mysql-0.mysql.default.svc.cluster.local
      mysql-1.mysql.default.svc.cluster.local
      mysql-2.mysql.default.svc.cluster.local
      2021/12/06 10:19:09 *** [Galera] Joining cluster: mysql-1.mysql.default.svc.cluster.local,mysql-2.mysql.default.svc.cluster.local
      2021/12/06 10:19:10 Peer finder exiting
      Galera - Determining recovery position...
      galera-recovery.sh: Attempting to recover GTID positon...
      2021-12-06 10:19:11 0 [Note] mysqld (mysqld 10.5.13-MariaDB-1:10.5.13+maria~focal) starting as process 49 ...
      galera-recovery.sh: Found WSREP position: 27703fb6-fab1-11eb-916a-3f7c89091ca1:47824716
      Galera recovery position: --wsrep_start_position=27703fb6-fab1-11eb-916a-3f7c89091ca1:47824716
      2021-12-06 10:19:12 0 [Note] mysqld (mysqld 10.5.13-MariaDB-1:10.5.13+maria~focal) starting as process 1 ...
      2021-12-06 10:19:12 0 [Note] WSREP: Loading provider /usr/lib/galera/libgalera_smm.so initial position: 27703fb6-fab1-11eb-916a-3f7c89091ca1:47824716
      2021-12-06 10:19:12 0 [Note] WSREP: wsrep_load(): loading provider library '/usr/lib/galera/libgalera_smm.so'
      2021-12-06 10:19:12 0 [Note] WSREP: wsrep_load(): Galera 26.4.9(r819f29cb) by Codership Oy <info@codership.com> loaded successfully.
      2021-12-06 10:19:12 0 [Note] WSREP: CRC-32C: using 64-bit x86 acceleration.
      2021-12-06 10:19:12 0 [Note] WSREP: Found saved state: 27703fb6-fab1-11eb-916a-3f7c89091ca1:-1, safe_to_bootstrap: 1
      2021-12-06 10:19:12 0 [Note] WSREP: GCache DEBUG: opened preamble:
      Version: 2
      UUID: 27703fb6-fab1-11eb-916a-3f7c89091ca1
      Seqno: -1 - -1
      Offset: -1
      Synced: 0
      2021-12-06 10:19:12 0 [Note] WSREP: Recovering GCache ring buffer: version: 2, UUID: 27703fb6-fab1-11eb-916a-3f7c89091ca1, offset: -1
      2021-12-06 10:19:12 0 [Note] WSREP: GCache::RingBuffer initial scan...  0.0% (        0/134217752 bytes) complete.
      2021-12-06 10:19:12 0 [Warning] WSREP: Exception while mapping writeset 7493998576037527552 into [47818165, 47824717): 'deque::_M_new_elements_at_back'. Aborting GCache recovery.
      2021-12-06 10:19:12 0 [Note] WSREP: GCache::RingBuffer initial scan...100.0% (134217752/134217752 bytes) complete.
      2021-12-06 10:19:12 0 [Note] WSREP: Recovering GCache ring buffer: found gapless sequence 47818165-47824716
      2021-12-06 10:19:12 0 [Note] WSREP: GCache::RingBuffer unused buffers scan...  0.0% (        0/133983928 bytes) complete.
      211206 10:19:12 [ERROR] mysqld got signal 11 ;
      This could be because you hit a bug. It is also possible that this binary
      or one of the libraries it was linked against is corrupt, improperly built,
      or misconfigured. This error can also be caused by malfunctioning hardware.
      To report this bug, see https://mariadb.com/kb/en/reporting-bugs
      We will try our best to scrape up some info that will hopefully help
      diagnose the problem, but since we have already crashed,
      something is definitely wrong and this may fail.
      Server version: 10.5.13-MariaDB-1:10.5.13+maria~focal
      key_buffer_size=0
      read_buffer_size=131072
      max_used_connections=0
      max_threads=252
      thread_count=0
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 554746 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
      Thread pointer: 0x0
      Attempting backtrace. You can use the following information to find out
      where mysqld died. If you see no messages after this, something went
      terribly wrong...
      stack_bottom = 0x0 thread_stack 0x49000
      mysqld(my_print_stacktrace+0x32)[0x564cb13b5e42]
      Printing to addr2line failed
      mysqld(handle_fatal_signal+0x485)[0x564cb0e059a5]
      /lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7fe5dc4463c0]
      /usr/lib/galera/libgalera_smm.so(+0x1b553c)[0x7fe5d65e653c]
      /usr/lib/galera/libgalera_smm.so(+0x1b7de7)[0x7fe5d65e8de7]
      /usr/lib/galera/libgalera_smm.so(+0x1b9362)[0x7fe5d65ea362]
      /usr/lib/galera/libgalera_smm.so(+0x1bd727)[0x7fe5d65ee727]
      /usr/lib/galera/libgalera_smm.so(+0x7b6b8)[0x7fe5d64ac6b8]
      /usr/lib/galera/libgalera_smm.so(+0x4ee82)[0x7fe5d647fe82]
      mysqld(_ZN5wsrep18wsrep_provider_v26C1ERNS_12server_stateERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESA_RKNS_8provider8servicesE+0x1dc)[0x564cb144e02c]
      mysqld(_ZN5wsrep8provider13make_providerERNS_12server_stateERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESA_RKNS0_8servicesE+0x54)[0x564cb144b034]
      mysqld(_ZN5wsrep12server_state13load_providerERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES8_RKNS_8provider8servicesE+0x1f3)[0x564cb14363f3]
      mysqld(_Z10wsrep_initv+0x233)[0x564cb10cf2f3]
      mysqld(_Z18wsrep_init_startupb+0x16)[0x564cb10cf8e6]
      mysqld(+0x6983f9)[0x564cb0b1e3f9]
      mysqld(_Z11mysqld_mainiPPc+0x401)[0x564cb0b23201]
      /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7fe5dbf2d0b3]
      mysqld(_start+0x2e)[0x564cb0b17ede]
      The manual page at https://mariadb.com/kb/en/how-to-produce-a-full-stack-trace-for-mysqld/ contains
      information that should help you find out what is causing the crash.
      Writing a core file...
      Working directory at /var/lib/mysql
      Resource Limits:
      Limit                     Soft Limit           Hard Limit           Units
      Max cpu time              unlimited            unlimited            seconds
      Max file size             unlimited            unlimited            bytes
      Max data size             unlimited            unlimited            bytes
      Max stack size            8388608              unlimited            bytes
      Max core file size        unlimited            unlimited            bytes
      Max resident set          unlimited            unlimited            bytes
      Max processes             unlimited            unlimited            processes
      Max open files            1048576              1048576              files
      Max locked memory         67108864             67108864             bytes
      Max address space         unlimited            unlimited            bytes
      Max file locks            unlimited            unlimited            locks
      Max pending signals       128321               128321               signals
      Max msgqueue size         819200               819200               bytes
      Max nice priority         0                    0
      Max realtime priority     0                    0
      Max realtime timeout      unlimited            unlimited            us
      Core pattern: |/usr/share/apport/apport %p %s %c %d %P %E
      

      The workaround was to let node fo the full resync from other 2 nodes

      ENV: 3 master setup

      Config:

      data:
        galera.cnf: |
          [galera]
          user = mysql
          bind-address = 0.0.0.0
          default_storage_engine = InnoDB
          binlog_format = ROW
          innodb_autoinc_lock_mode = 2
          innodb_flush_log_at_trx_commit = 0
          query_cache_size = 0
          query_cache_type = 0
          binlog_cache_size = 61440
       
          # MariaDB Galera settings
          wsrep_on=ON
          wsrep_provider=/usr/lib/galera/libgalera_smm.so
          wsrep_sst_method=rsync
          wsrep_slave_threads=8
          wsrep_sync_wait=7
       
          # Cluster settings (automatically updated)
          wsrep_cluster_address=gcomm://
          wsrep_cluster_name=mysql
          wsrep_node_address=127.0.0.1
        mariadb.cnf: "[client]\ndefault-character-set = utf8\n[mysqld]\ncore-file\nunix_socket
          = OFF\nperformance_schema = ON\ncharacter-set-server = utf8\ncollation-server
          = utf8_general_ci\nignore-db-dirs = lost+found \nmax_connections = 250\ninteractive_timeout
          = 450 \nwait_timeout = 450\ntable_definition_cache = 2100\n# InnoDB tuning\ninnodb_buffer_pool_size
          = 8400MB\ninnodb_log_file_size = 2G\n"
      

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            Assignee:
            jplindst Jan Lindström
            Reporter:
            jaroslav Jaroslav
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              Dates

              Created:
              Updated:
              Resolved:

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