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  1. MariaDB Server
  2. MDEV-473

Statistics: Server crashes in mysql_lock_merge if use_stat_tables is enabled and ANALYZE and ALTER TABLE are executed under lock


    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 10.0.0
    • Component/s: None
    • Labels:


      #3  <signal handler called>
      #4  0x00000000008b8e0e in mysql_lock_merge (a=0x0, b=0x1e99f20)
          at sql/lock.cc:609
      #5  0x00000000005d40e5 in Locked_tables_list::reopen_tables (this=0x7f60ac05eb78,
          thd=0x7f60ac05c940) at sql/sql_base.cc:3621
      #6  0x00000000006d4332 in mysql_alter_table (thd=0x7f60ac05c940, new_db=0x1e79ee8 "test",
          new_name=0x1e798e8 "t1", create_info=0x7f60b2d57d00, table_list=0x1e79920,
          alter_info=0x7f60b2d57e00, order_num=0, order=0x0, ignore=false, require_online=false)
          at sql/sql_table.cc:7193
      #7  0x0000000000955c7b in Alter_table_statement::execute (this=0x1e79ff8, thd=0x7f60ac05c940)
          at sql/sql_alter.cc:106
      #8  0x0000000000636091 in mysql_execute_command (thd=0x7f60ac05c940)
          at sql/sql_parse.cc:4459
      #9  0x0000000000639197 in mysql_parse (thd=0x7f60ac05c940,
          rawbuf=0x1e79828 "alter table t1 add column a varchar(8)", length=38,
          parser_state=0x7f60b2d58600) at sql/sql_parse.cc:5736
      #10 0x000000000062d019 in dispatch_command (command=COM_QUERY, thd=0x7f60ac05c940,
          packet=0x7f60ac11c421 "alter table t1 add column a varchar(8)", packet_length=38)
          at sql/sql_parse.cc:1055
      #11 0x000000000062c2ec in do_command (thd=0x7f60ac05c940)
          at sql/sql_parse.cc:794
      #12 0x0000000000730d51 in do_handle_one_connection (thd_arg=0x7f60ac05c940)
          at sql/sql_connect.cc:1253
      #13 0x0000000000730814 in handle_one_connection (arg=0x7f60ac05c940)
          at sql/sql_connect.cc:1168
      #14 0x0000000000abad87 in pfs_spawn_thread (arg=0x7f60ac0c8700)
          at storage/perfschema/pfs.cc:1015
      #15 0x00007f60be7aca4f in start_thread () from /lib64/libpthread.so.0
      #16 0x00007f60bd54182d in clone () from /lib64/libc.so.6

      bzr version-info

      revision-id: igor@askmonty.org-20120820190537-epzo04x3o58ccj6i
      date: 2012-08-20 12:05:37 -0700
      build-date: 2012-08-22 05:03:32 +0300
      revno: 3362

      Reproducible with MyISAM, Aria, InnoDB, MEMORY.
      Not reproducible with use_stat_tables = NEVER.

      Test case:

      set use_stat_tables = complementary;
      drop table if exists t1;
      create table t1 (i int) engine=InnoDB;
      lock table t1 write;
      analyze table t1;
      alter table t1 add column a varchar(8);
      # Cleanup
      drop table t1;




            • Assignee:
              igor Igor Babaev
              elenst Elena Stepanova
            • Votes:
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              3 Start watching this issue


              • Created: