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  1. MariaDB Server
  2. MDEV-21457

Galera node crashes spontaneously after single delete operation

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 10.2.29
    • Fix Version/s: 10.2
    • Labels:
      None
    • Environment:

      Description

      Galera node crashes spontaneously after a single delete operation.

      There is a query on DB1:

      #200110 13:26:47 server id 1  end_log_pos 61604233 CRC32 0x4802bc88     Annotate_rows:
      #Q> DELETE FROM `users` WHERE `id`=579611
      #200110 13:26:47 server id 1  end_log_pos 61604314 CRC32 0x8385669b     Table_map: `XXX`.`users` mapped to number 93706
      # at 61604314
      #200110 13:26:47 server id 1  end_log_pos 61604395 CRC32 0xa8239d1b     Table_map: `XXX`.`users_profiles` mapped to number 93729
      # at 61604395
      #200110 13:26:47 server id 1  end_log_pos 61604462 CRC32 0x9f3cacc3     Table_map: `XXX`.`documents` mapped to number 93711
      # at 61604462
      #200110 13:26:47 server id 1  end_log_pos 61604545 CRC32 0x62acaf45     Table_map: `XXX`.`shop_characteristics` mapped to number 93763
      # at 61604545
      #200110 13:26:47 server id 1  end_log_pos 61604626 CRC32 0xa235fd75     Table_map: `XXX`.`shop_reviews` mapped to number 93747
      # at 61604626
      #200110 13:26:47 server id 1  end_log_pos 61604709 CRC32 0x1f8ea18f     Table_map: `XXX`.`youtube_videos` mapped to number 93694
      # at 61604709
      #200110 13:26:47 server id 1  end_log_pos 61604791 CRC32 0xa6bf9d19     Table_map: `XXX`.`shop_categories_characteristics` mapped to number 93764
      # at 61604791
      #200110 13:26:47 server id 1  end_log_pos 61604869 CRC32 0x32269d26     Table_map: `XXX`.`shop_characteristics_values` mapped to number 93765
      # at 61604869
      #200110 13:26:47 server id 1  end_log_pos 61604938 CRC32 0xf8ccacea     Table_map: `XXX`.`shop_products_values` mapped to number 93746
      # at 61604938
      #200110 13:26:47 server id 1  end_log_pos 61605124 CRC32 0xe107f6a0     Delete_rows: table id 93706 flags: STMT_END_F
      

      While this query is being processed by the second DB node, mysqld on DB #2 fails with signal 11:

      mysql error log

      200110 13:51:22 [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: 10.2.29-MariaDB-log
      key_buffer_size=268435456
      read_buffer_size=524288
      max_used_connections=0
      max_threads=4002
      thread_count=15
      It is possible that mysqld could use up to
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 4445557 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f16f00009a8
      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 = 0x7f18407da910 thread_stack 0x49000
      /usr/sbin/mysqld(my_print_stacktrace+0x2e)[0x55671cadcf7e]
      /usr/sbin/mysqld(handle_fatal_signal+0x30d)[0x55671c56210d]
      sigaction.c:0(__restore_rt)[0x7f1846fc25f0]
      :0(__memset_sse2)[0x7f18452eca0e]
      /usr/sbin/mysqld(+0x8f01b1)[0x55671c7ce1b1]
      /usr/sbin/mysqld(+0x832dc2)[0x55671c710dc2]
      /usr/sbin/mysqld(+0x9258db)[0x55671c8038db]
      /usr/sbin/mysqld(+0x926376)[0x55671c804376]
      /usr/sbin/mysqld(+0x9280a9)[0x55671c8060a9]
      /usr/sbin/mysqld(+0x8f2c9c)[0x55671c7d0c9c]
      /usr/sbin/mysqld(+0x8de02d)[0x55671c7bc02d]
      /usr/sbin/mysqld(+0x921b2e)[0x55671c7ffb2e]
      /usr/sbin/mysqld(+0x926897)[0x55671c804897]
      /usr/sbin/mysqld(+0x9280a9)[0x55671c8060a9]
      /usr/sbin/mysqld(+0x8f288b)[0x55671c7d088b]
      /usr/sbin/mysqld(+0x82c11c)[0x55671c70a11c]
      /usr/sbin/mysqld(_ZN7handler13ha_delete_rowEPKh+0x44b)[0x55671c56d94b]
      /usr/sbin/mysqld(_ZN21Delete_rows_log_event11do_exec_rowEP14rpl_group_info+0x15b)[0x55671c66460b]
      /usr/sbin/mysqld(_ZN14Rows_log_event14do_apply_eventEP14rpl_group_info+0x31c)[0x55671c65609c]
      /usr/sbin/mysqld(wsrep_apply_cb+0x502)[0x55671c506982]
      src/trx_handle.cpp:312(galera::TrxHandle::apply(void*, wsrep_cb_status (*)(void*, void const*, unsigned long, unsigned int, wsrep_trx_meta const*), wsrep_trx_meta const&) const)[0x7f1841a30ee8]
      src/replicator_smm.cpp:92(apply_trx_ws(void*, wsrep_cb_status (*)(void*, void const*, unsigned long, unsigned int, wsrep_trx_meta const*), wsrep_cb_status (*)(void*, unsigned int, wsrep_trx_meta const*, bool*, bool), galera::TrxHandle const&, wsrep_trx_meta const&))[0x7f1841a6e063]
      src/replicator_smm.cpp:450(galera::ReplicatorSMM::apply_trx(void*, galera::TrxHandle*))[0x7f1841a711bc]
      src/gu_mutex.hpp:38(gu::Mutex::unlock() const)[0x7f1841a7ed1e]
      src/replicator_str.cpp:751(galera::ReplicatorSMM::request_state_transfer(void*, wsrep_uuid const&, long, void const*, long))[0x7f1841a8025d]
      src/replicator_smm.cpp:1483(galera::ReplicatorSMM::process_conf_change(void*, wsrep_view_info const&, int, galera::Replicator::State, long))[0x7f1841a755d6]
      src/gcs_action_source.cpp:139(galera::GcsActionSource::dispatch(void*, gcs_action const&, bool&))[0x7f1841a4fbdc]
      src/gcs_action_source.cpp:28(~Release)[0x7f1841a50f7c]
      src/replicator_smm.cpp:362(galera::ReplicatorSMM::async_recv(void*))[0x7f1841a7497b]
      src/wsrep_provider.cpp:271(galera_recv)[0x7f1841a82978]
      /usr/sbin/mysqld(+0x629b97)[0x55671c507b97]
      /usr/sbin/mysqld(start_wsrep_THD+0x4fb)[0x55671c4f6eeb]
      pthread_create.c:0(start_thread)[0x7f1846fbae65]
      /lib64/libc.so.6(clone+0x6d)[0x7f184535b88d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f16e001300b): DELETE FROM `users` WHERE `id`=579611
      Connection ID (thread ID): 2
      Status: NOT_KILLED
      

      It tries to restart but always get the same error.

      /var/log/messages

      Jan 10 13:26:51 cls-db2 kernel: mysqld[17419]: segfault at 42e ip 00007fb934efea0e sp 00007fb6248a52d8 error 6 in libc-2.17.so[7fb934e6f000+1c3000]
      Jan 10 13:26:52 cls-db2 systemd: mariadb.service: main process exited, code=killed, status=11/SEGV
      Jan 10 13:26:52 cls-db2 systemd: Unit mariadb.service entered failed state.
      Jan 10 13:26:52 cls-db2 systemd: mariadb.service failed.
      Jan 10 13:26:57 cls-db2 systemd: mariadb.service holdoff time over, scheduling restart.
      Jan 10 13:26:57 cls-db2 systemd: Stopped MariaDB 10.2.29 database server.
      Jan 10 13:26:57 cls-db2 systemd: Starting MariaDB 10.2.29 database server...
      Jan 10 13:27:03 cls-db2 sh: WSREP: Recovered position 4dcee1ec-1f7f-11ea-acd7-e66ec9f0752e:90361997
      Jan 10 13:27:03 cls-db2 mysqld: 2020-01-10 13:27:03 140420010002624 [Note] /usr/sbin/mysqld (mysqld 10.2.29-MariaDB-log) starting as process 25738 ...
      Jan 10 13:27:06 cls-db2 systemd: Started MariaDB 10.2.29 database server.
      Jan 10 13:27:07 cls-db2 kernel: mysqld[25745]: segfault at 42e ip 00007fb612c1fa0e sp 00007fb60c1027e8 error 6 in libc-2.17.so[7fb612b90000+1c3000]
      Jan 10 13:27:07 cls-db2 systemd: mariadb.service: main process exited, code=killed, status=11/SEGV
      Jan 10 13:27:07 cls-db2 systemd: Unit mariadb.service entered failed state.
      Jan 10 13:27:07 cls-db2 systemd: mariadb.service failed.
      Jan 10 13:27:12 cls-db2 systemd: mariadb.service holdoff time over, scheduling restart.
      Jan 10 13:27:12 cls-db2 systemd: Stopped MariaDB 10.2.29 database server.
      Jan 10 13:27:12 cls-db2 systemd: Starting MariaDB 10.2.29 database server...
      

      mysql config

      [mysqld]
      server-id=1
      bind-address=XXXX
      datadir=/var/lib/mysql
      user                           = mysql
      socket                         = /var/lib/mysql/mysql.sock
      pid-file                       = /var/lib/mysql/mysql.pid
      collation-server               = utf8_unicode_ci
      init-connect                   = 'SET NAMES utf8'
      character-set-server           = utf8
      key-buffer-size                = 256M
      join_buffer_size               = 512K
      read_buffer_size               = 512K
      read_rnd_buffer_size           = 512K
      sort_buffer_size               = 512K
      myisam-recover-options         = FORCE,BACKUP
      skip-host-cache
      skip-name-resolve
      max_connections                = 4000
      max_allowed_packet             = 512M
      max_binlog_size                = 100M
      sysdate-is-now                 = 1
      innodb-autoinc-lock-mode       = 2
      innodb_autoinc_lock_mode       = 2
      innodb-doublewrite             = 1
      innodb_flush_log_at_trx_commit = 0
      datadir                        = /var/lib/mysql
      tmp-table-size                 = 32M
      max-heap-table-size            = 32M
      query_cache_type = 1
      query_cache_size               = 1M
      query_cache_limit	       = 16M
      thread-cache-size              = 32
      open-files-limit               = 65535
      table-definition-cache         = 4096
      table-open-cache               = 4096
      innodb-flush-method            = O_DIRECT
      innodb-log-files-in-group      = 2
      innodb-log-file-size           = 256M
      innodb-flush-log-at-trx-commit = 2
      innodb-file-per-table          = 1
      innodb-buffer-pool-size        = 6G
      innodb_io_capacity             = 2000
      log-queries-not-using-indexes  = 1
      slow-query-log                 = 1
      slow_query_log_file = /var/log/mysql/mysql_slow.log
      binlog_format			= ROW
      skip_log_bin
      expire_logs_days   = 1
      log_error = /var/log/mysql/mysql_error.log
       
      [galera]
      wsrep_cluster_address = gcomm://XXXX,XXXX
      default_storage_engine=InnoDB
      wsrep_on=ON
      wsrep_node_address             = XXX
      wsrep_provider                 = /usr/lib64/galera/libgalera_smm.so
      wsrep_slave_threads	       = 8
      wsrep_node_name                = XXX
      wsrep_sst_method               = mariabackup
      wsrep_sst_auth                 = "XXXX"
      wsrep_cluster_name             = XXX
      wsrep_log_conflicts            = 1
      wsrep_provider_options="gcache.size = 5G"
      

      We're not using MyISAM and query cache.

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            Assignee:
            jplindst Jan Lindström
            Reporter:
            smesilov Semen Mesilov
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              Dates

              Created:
              Updated: