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  1. MariaDB Server
  2. MDEV-23192

Crash in row_search_mvcc() probably related to secondary index corruption

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      Description

      Server crashes repeatedly with stack trace like this:

      020-07-16  9:27:03 0 [Note] /usr/local/mysql/bin/mysqld: ready for connections.
      Version: '10.4.13-MariaDB-log'  socket: '/tmp/mysql.sock'  port: 33306  MariaDB Server
      200716  9:27:56 [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: 10.4.13-MariaDB-log
      key_buffer_size=33554432
      read_buffer_size=1048576
      max_used_connections=74
      max_threads=2010
      thread_count=80
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 10348902 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f28283308b8
      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 = 0x7f28aafb1de0 thread_stack 0x49000
      /usr/local/mysql/bin/mysqld(my_print_stacktrace+0x2e)[0x55af7c963e2e]
      /usr/local/mysql/bin/mysqld(handle_fatal_signal+0x30f)[0x55af7c374b3f]
      sigaction.c:0(__restore_rt)[0x7f2d914245e0]
      /usr/local/mysql/bin/mysqld(+0xbb8f85)[0x55af7c603f85]
      /usr/local/mysql/bin/mysqld(+0xad8bb8)[0x55af7c523bb8]
      row/row0sel.cc:4777(row_search_mvcc(unsigned char*, page_cur_mode_t, row_prebuilt_t*, unsigned long, unsigned long))[0x55af7c3798f4]
      handler/ha_innodb.cc:9279(ha_innobase::index_read(unsigned char*, unsigned char const*, unsigned int, ha_rkey_function))[0x55af7c1b3cb7]
      sql/handler.cc:2896(handler::ha_index_read_map(unsigned char*, unsigned char const*, unsigned long, ha_rkey_function))[0x55af7c1a58b9]
      sql/sql_select.cc:21124(join_read_always_key(st_join_table*))[0x55af7c1c8123]
      /usr/local/mysql/bin/mysqld(_ZN4JOIN4execEv+0x33)[0x55af7c1c8353]
      /usr/local/mysql/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x186)[0x55af7c1c65b6]
      /usr/local/mysql/bin/mysqld(+0x6e5637)[0x55af7c130637]
      /usr/local/mysql/bin/mysqld(_Z27mysql_handle_single_derivedP3LEXP10TABLE_LISTj+0x104)[0x55af7c1301d4]
      sql/sql_derived.cc:1200(mysql_derived_fill(THD*, LEX*, TABLE_LIST*))[0x55af7c1a5649]
      /usr/local/mysql/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x178)[0x55af7c1a5888]
      /usr/local/mysql/bin/mysqld(+0x74d07c)[0x55af7c19807c]
      /usr/local/mysql/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x1be)[0x55af7c1a58ce]
      sql_select.cc:0(evaluate_join_record(JOIN*, st_join_table*, int))[0x55af7c1c8123]
      /usr/local/mysql/bin/mysqld(_ZN4JOIN4execEv+0x33)[0x55af7c1c8353]
      /usr/local/mysql/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x186)[0x55af7c1c65b6]
      /usr/local/mysql/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x1c7)[0x55af7c1c7117]
      /usr/local/mysql/bin/mysqld(+0x6167d7)[0x55af7c0617d7]
      /usr/local/mysql/bin/mysqld(_Z21mysql_execute_commandP3THD+0x3a6a)[0x55af7c16d91a]
      sql/sql_parse.cc:6360(execute_sqlcom_select(THD*, TABLE_LIST*))[0x55af7c172f7c]
      /usr/local/mysql/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x1d9e)[0x55af7c1754ee]
      /usr/local/mysql/bin/mysqld(_Z10do_commandP3THD+0x109)[0x55af7c176d79]
      /usr/local/mysql/bin/mysqld(_Z11tp_callbackP13TP_connection+0x1d8)[0x55af7c347068]
      /usr/local/mysql/bin/mysqld(+0xab4cc0)[0x55af7c4ffcc0]
      sql/threadpool_common.cc:365(tp_callback(TP_connection*))[0x55af7c88fdcd]
      pthread_create.c:0(start_thread)[0x7f2d9141cde5]
      /lib64/libc.so.6(clone+0x6d)[0x7f2d9027af1d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f2828075ad0): SELECT   ...
      

      while executing complex enough SELECT involving the secondary index previously reported as problematic:

      2020-07-16  9:26:30 165327 [ERROR] InnoDB: Clustered record for sec rec not found index `T_IDX02` of table `db`.`T`
      InnoDB: sec index record PHYSICAL RECORD: n_fields 1; compact format; info bits 64
      ...
      2020-07-16 09:26:30 0x7f70c44e6700  InnoDB: Assertion failure in file /home/buildbot/buildbot/build/storage/innobase/rem/rem0rec.cc line 1982
      InnoDB: We intentionally generate a memory trap.
      InnoDB: Submit a detailed bug report to https://jira.mariadb.org/
      InnoDB: If you get repeated assertion failures or crashes, even
      InnoDB: immediately after the mysqld startup, there may be
      InnoDB: corruption in the InnoDB tablespace. Please refer to
      InnoDB: https://mariadb.com/kb/en/library/innodb-recovery-modes/
      InnoDB: about forcing recovery.
      200716  9:26:30 [ERROR] mysqld got signal 6 ;
      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: 10.4.13-MariaDB-log
      key_buffer_size=33554432
      read_buffer_size=1048576
      max_used_connections=235
      max_threads=2010
      thread_count=151
      It is possible that mysqld could use up to 
      key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 10348902 K  bytes of memory
      Hope that's ok; if not, decrease some variables in the equation.
       
      Thread pointer: 0x7f6fd261a508
      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 = 0x7f70c44e5de0 thread_stack 0x49000
      /usr/local/mysql/bin/mysqld(my_print_stacktrace+0x2e)[0x55d0a511ee2e]
      /usr/local/mysql/bin/mysqld(handle_fatal_signal+0x30f)[0x55d0a4b2fb3f]
      /lib64/libpthread.so.0(+0xf5e0)[0x7f759cd8e5e0]
      /lib64/libc.so.6(gsignal+0x37)[0x7f759bb1d277]
      /lib64/libc.so.6(abort+0x148)[0x7f759bb1e968]
      /usr/local/mysql/bin/mysqld(+0x629e48)[0x55d0a482fe48]
      /usr/local/mysql/bin/mysqld(+0xb72683)[0x55d0a4d78683]
      /usr/local/mysql/bin/mysqld(+0xc43ddf)[0x55d0a4e49ddf]
      /usr/local/mysql/bin/mysqld(+0xbb9c00)[0x55d0a4dbfc00]
      /usr/local/mysql/bin/mysqld(+0xad8bb8)[0x55d0a4cdebb8]
      /usr/local/mysql/bin/mysqld(_ZN7handler17ha_index_read_mapEPhPKhm16ha_rkey_function+0x94)[0x55d0a4b348f4]
      /usr/local/mysql/bin/mysqld(+0x768cb7)[0x55d0a496ecb7]
      /usr/local/mysql/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x1a9)[0x55d0a49608b9]
      /usr/local/mysql/bin/mysqld(_ZN4JOIN10exec_innerEv+0xc73)[0x55d0a4983123]
      /usr/local/mysql/bin/mysqld(_ZN4JOIN4execEv+0x33)[0x55d0a4983353]
      /usr/local/mysql/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x186)[0x55d0a49815b6]
      /usr/local/mysql/bin/mysqld(+0x6e5637)[0x55d0a48eb637]
      /usr/local/mysql/bin/mysqld(_Z27mysql_handle_single_derivedP3LEXP10TABLE_LISTj+0x104)[0x55d0a48eb1d4]
      /usr/local/mysql/bin/mysqld(_ZN13st_join_table12preread_initEv+0x79)[0x55d0a4960649]
      /usr/local/mysql/bin/mysqld(_Z10sub_selectP4JOINP13st_join_tableb+0x178)[0x55d0a4960888]
      /usr/local/mysql/bin/mysqld(_ZN4JOIN10exec_innerEv+0xc73)[0x55d0a4983123]
      /usr/local/mysql/bin/mysqld(_ZN4JOIN4execEv+0x33)[0x55d0a4983353]
      /usr/local/mysql/bin/mysqld(_Z12mysql_selectP3THDP10TABLE_LISTjR4ListI4ItemEPS4_jP8st_orderS9_S7_S9_yP13select_resultP18st_select_lex_unitP13st_select_lex+0x186)[0x55d0a49815b6]
      /usr/local/mysql/bin/mysqld(_Z13handle_selectP3THDP3LEXP13select_resultm+0x1c7)[0x55d0a4982117]
      /usr/local/mysql/bin/mysqld(+0x6167d7)[0x55d0a481c7d7]
      /usr/local/mysql/bin/mysqld(_Z21mysql_execute_commandP3THD+0x3a6a)[0x55d0a492891a]
      /usr/local/mysql/bin/mysqld(_Z11mysql_parseP3THDPcjP12Parser_statebb+0x33c)[0x55d0a492df7c]
      /usr/local/mysql/bin/mysqld(_Z16dispatch_command19enum_server_commandP3THDPcjbb+0x1d9e)[0x55d0a49304ee]
      /usr/local/mysql/bin/mysqld(_Z10do_commandP3THD+0x109)[0x55d0a4931d79]
      /usr/local/mysql/bin/mysqld(_Z11tp_callbackP13TP_connection+0x1d8)[0x55d0a4b02068]
      /usr/local/mysql/bin/mysqld(+0xab4cc0)[0x55d0a4cbacc0]
      /usr/local/mysql/bin/mysqld(+0xe44dcd)[0x55d0a504adcd]
      /lib64/libpthread.so.0(+0x7de5)[0x7f759cd86de5]
      /lib64/libc.so.6(clone+0x6d)[0x7f759bbe4f1d]
       
      Trying to get some variables.
      Some pointers may be invalid and cause the dump to abort.
      Query (0x7f70720c3200): SELECT ...
      

      After dropping and recreating the index crashes stopped. The instance had never been restored from mariabackup. There are no virtual columns involved.

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              Assignee:
              valerii Valerii Kravchuk
              Reporter:
              valerii Valerii Kravchuk
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                Created:
                Updated:
                Resolved: