[MDEV-26020] Server crash on converting table to utf8mb3 Created: 2021-06-25  Updated: 2021-10-07  Resolved: 2021-10-07

Status: Closed
Project: MariaDB Server
Component/s: Storage Engine - InnoDB, Virtual Columns
Affects Version/s: 10.4
Fix Version/s: N/A

Type: Bug Priority: Major
Reporter: Nikita Malyavin Assignee: Nikita Malyavin
Resolution: Duplicate Votes: 0
Labels: None

Issue Links:
Duplicate
duplicates MDEV-20131 Assertion `!pk->has_virtual ()' faile... Closed
Problem/Incident
is caused by MDEV-371 Unique indexes for blobs Closed

 Description   

The following test crashes with --innodb_page_size=4k

CREATE TABLE t (c TEXT,PRIMARY KEY(c (768))) ENGINE=InnoDB;
INSERT INTO t VALUES (100);
ALTER TABLE t CONVERT TO CHARACTER SET utf8mb3;
SELECT 1 FROM t GROUP BY @b :=@a,@b;

mysqld: ../storage/innobase/dict/dict0dict.cc:2322: dict_index_t *dict_index_build_internal_clust(dict_index_t *): Assertion `!index->has_virtual()' failed.
210624 20:29:01 [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: 10.4.20-MariaDB-debug-log
key_buffer_size=1048576
read_buffer_size=131072
max_used_connections=1
max_threads=153
thread_count=3
It is possible that mysqld could use up to 
key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 63650 K  bytes of memory
Hope that's ok; if not, decrease some variables in the equation.
 
Thread pointer: 0x7fca30001618
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 = 0x7fca440f8d50 thread_stack 0x49000
mysys/stacktrace.c:174(my_print_stacktrace)[0x56432441a47b]
sql/signal_handler.cc:222(handle_fatal_signal)[0x564323994624]
/usr/lib/libpthread.so.0(+0x13960)[0x7fca5422d960]
:0(__GI_raise)[0x7fca53e8bef5]
:0(__GI_abort)[0x7fca53e75862]
loadmsgcat.c:0(_nl_load_domain.cold)[0x7fca53e75747]
:0(__GI___assert_fail)[0x7fca53e84646]
/home/nik/mariadb/bld/sql/mysqld(+0x13dcab4)[0x5643240a3ab4]
dict/dict0dict.cc:2322(dict_index_build_internal_clust(dict_index_t*))[0x5643240a2a70]
dict/dict0crea.cc:1249(dict_create_index_step(que_thr_t*))[0x56432408f488]
que/que0que.cc:1048(que_thr_step(que_thr_t*))[0x564323e0aa94]
que/que0que.cc:1100(que_run_threads_low(que_thr_t*))[0x564323e099d5]
que/que0que.cc:1142(que_run_threads(que_thr_t*))[0x564323e096ed]
row/row0mysql.cc:2560(row_create_index_for_mysql(dict_index_t*, trx_t*, unsigned long const*))[0x564323e8ed07]
handler/ha_innodb.cc:11371(create_index(trx_t*, TABLE const*, dict_table_t*, unsigned int))[0x564323ca56ec]
handler/ha_innodb.cc:12454(create_table_info_t::create_table(bool))[0x564323c816ba]
handler/ha_innodb.cc:12975(ha_innobase::create(char const*, TABLE*, HA_CREATE_INFO*, bool, trx_t*))[0x564323ca696f]
handler/ha_innodb.cc:13026(ha_innobase::create(char const*, TABLE*, HA_CREATE_INFO*))[0x564323c8307f]
addr2line: DWARF error: could not find variable specification at offset 8445
sql/handler.cc:4790(handler::ha_create(char const*, TABLE*, HA_CREATE_INFO*))[0x5643239a75ad]
sql/handler.cc:5255(ha_create_table(THD*, char const*, char const*, char const*, HA_CREATE_INFO*, st_mysql_const_unsigned_lex_string*))[0x5643239a92be]
sql/sql_table.cc:10308(mysql_alter_table(THD*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, HA_CREATE_INFO*, TABLE_LIST*, Alter_info*, unsigned int, st_order*, bool))[0x5643236abf91]
sql/sql_alter.cc:520(Sql_cmd_alter_table::execute(THD*))[0x56432376ebd7]
sql/sql_parse.cc:6189(mysql_execute_command(THD*))[0x564323591b56]
sql/sql_parse.cc:7992(mysql_parse(THD*, char*, unsigned int, Parser_state*, bool, bool))[0x56432357d284]
sql/sql_parse.cc:1857(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool, bool))[0x56432357945e]
sql/sql_parse.cc:1373(do_command(THD*))[0x56432357e2a4]
sql/sql_connect.cc:1412(do_handle_one_connection(CONNECT*))[0x564323763014]
sql/sql_connect.cc:1316(handle_one_connection)[0x564323762dca]
perfschema/pfs.cc:1869(pfs_spawn_thread)[0x564324387a05]
pthread_create.c:0(start_thread)[0x7fca54223299]
:0(__GI___clone)[0x7fca53f4e053]

Note that the assertion fails on ALTER TABLE, however the original issue was reported for a different assertion in SELECT in MDEV-18166, and was only reproducible in 10.5+.

So please commit with it with SELECT. The original task was resolved during the fix of an alternative case.


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