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

Description

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 #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

1 2 3 4 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:

1 2 3 4 5 6 7 8 9 10 11 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;

Environment

None

Status

Assignee

Igor Babaev

Reporter

Elena Stepanova

Fix versions

Priority

Major