Details
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Task
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Status: Closed (View Workflow)
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Major
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Resolution: Duplicate
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None
Description
the database crashes when a query is executed using a full text index which matches a lot of rows
this is the query
SELECT
e.id AS id
FROM
event_log e
WHERE
(
MATCH(single_line, username, event_name, data) AGAINST ('+ishay.com' IN BOOLEAN MODE)
)
ORDER BY
e.created DESC,
e.id DESC LIMIT 351;
ishay.com matches 3027948 rows
the problem doesn't happen if in the query I use a string which does not appear in the table
I believe this is a bug in innodb fts and that percona have already fixed it in their release
https://bugs.launchpad.net/percona-xtradb-cluster/+bug/1634932
when partitioning the table by timestamp (and including the timestamp in the query) the issue does NOT occur
this is the output from the error log
2022-07-18 09:01:24 0x7ff24413d700 InnoDB: Assertion failure in file /mnt/home/rpmstore-centos-seven/rpmstore/src/BUILD/mariadb-10.6.5/storage/innobase/fts/fts0que.cc line 3833
InnoDB: Failing assertion: !query->intersection
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 mariadbd 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.
220718 9:01:24 [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: 10.6.5-MariaDB
key_buffer_size=134217728
read_buffer_size=131072
max_used_connections=28
max_threads=502
thread_count=30
It is possible that mysqld could use up to
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 1236469 K bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
Thread pointer: 0x7ff1840009b8
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 = 0x7ff24413ccc0 thread_stack 0x49000
mysys/stacktrace.c:213(my_print_stacktrace)[0x56417d575e5e]
sql/signal_handler.cc:226(handle_fatal_signal)[0x56417cf97ec7]
sigaction.c:0(__restore_rt)[0x7ff54a062630]
:0(__GI_raise)[0x7ff5480b43d7]
:0(__GI_abort)[0x7ff5480b5ac8]
:0(ut_dbg_assertion_failed(char const*, char const*, unsigned int))[0x56417cc52fe9]
fts/fts0que.cc:3833(fts_query_free)[0x56417d4ce74b]
handler/ha_innodb.cc:9640(ha_innobase::ft_init_ext(unsigned int, unsigned int, String*))[0x56417d2a3eed]
sql/item_func.cc:6209(Item_func_match::init_search(THD*, bool))[0x56417d010588]
sql/sql_base.cc:9048(init_ftfuncs(THD*, st_select_lex*, bool))[0x56417cd11e89]
sql/sql_select.cc:3032(JOIN::optimize_stage2())[0x56417cdd2d28]
sql/sql_select.cc:2479(JOIN::optimize_inner())[0x56417cdd5266]
sql/sql_select.cc:1811(JOIN::optimize())[0x56417cdd7565]
sql/sql_select.cc:4980(mysql_select(THD*, TABLE_LIST*, List<Item>&, Item*, unsigned int, st_order*, st_order*, Item*, st_order*, unsigned long long, select_result*, st_select_lex_unit*, st_select_lex*))[0x56417cdd7638]
sql/sql_select.cc:557(handle_select(THD*, LEX*, select_result*, unsigned long))[0x56417cdd7f44]
sql/sql_parse.cc:6257(execute_sqlcom_select(THD*, TABLE_LIST*))[0x56417cc3c4ad]
sql/sql_parse.cc:3946(mysql_execute_command(THD*, bool))[0x56417cd7b774]
sql/sql_parse.cc:8031(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x56417cd7daab]
sql/sql_class.h:4336(THD::get_stmt_da())[0x56417cd7e2b9]
sql/sql_parse.cc:1883(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x56417cd8083b]
sql/sql_parse.cc:1406(do_command(THD*, bool))[0x56417cd81393]
sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x56417ce75447]
sql/sql_connect.cc:1316(handle_one_connection)[0x56417ce756e4]
perfschema/pfs.cc:2204(pfs_spawn_thread)[0x56417d200c82]
pthread_create.c:0(start_thread)[0x7ff54a05aea5]
??:0(__clone)[0x7ff54817c9fd]
Trying to get some variables.
Some pointers may be invalid and cause the dump to abort.
Query (0x7ff1840106e0): SELECT
e.id AS id
FROM
event_log e
WHERE
(
MATCH(single_line, username, event_name, data) AGAINST ('+ishay.com' IN BOOLEAN MODE)
)
ORDER BY
e.created DESC,
e.id DESC LIMIT 351
Connection ID (thread ID): 255
Status: KILL_QUERY
Optimizer switch: index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,index_merge_sort_intersection=off,engine_condition_pushdown=off,index_condition_pushdown=on,derived_merge=on,derived_with_keys=on,firstmatch=on,loosescan=on,materialization=on,in_to_exists=on,semijoin=on,partial_match_rowid_merge=on,partial_match_table_scan=on,subquery_cache=on,mrr=off,mrr_cost_based=off,mrr_sort_keys=off,outer_join_with_cache=on,semijoin_with_cache=on,join_cache_incremental=on,join_cache_hashed=on,join_cache_bka=on,optimize_join_buffer_size=on,table_elimination=on,extended_keys=on,exists_to_in=on,orderby_uses_equalities=on,condition_pushdown_for_derived=on,split_materialized=on,condition_pushdown_for_subquery=on,rowid_filter=on,condition_pushdown_from_having=on,not_null_range_scan=off
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 /db/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 0 unlimited bytes
Max resident set unlimited unlimited bytes
Max processes 125973 125973 processes
Max open files 96000 96000 files
Max locked memory 65536 65536 bytes
Max address space unlimited unlimited bytes
Max file locks unlimited unlimited locks
Max pending signals 125973 125973 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: core
Attachments
Issue Links
- is duplicated by
-
MDEV-27282 InnoDB: Assertion failure in file /local/p4clients/pkgbuild-78Qdm/workspace/src/RDSMariaDB/storage/innobase/fts/fts0que.cc line 3833 InnoDB: Failing assertion: !query->intersection
- Closed