ER_KEY_NOT_FOUND/lock timeout upon online alter with long unique indexes

--source include/have_innodb.inc

--source include/have_debug_sync.inc

CREATE TABLE t1 (b TEXT, UNIQUE(b)) ENGINE=InnoDB;

INSERT INTO t1 VALUES ('foo'),('bar');

--send

  set debug_sync= 'now wait_for downgraded';

--connect (con1,localhost,root,,test)

set debug_sync= 'alter_table_online_downgraded signal downgraded wait_for goforit';

--send

  ALTER TABLE t1 ADD c INT, ALGORITHM=COPY, LOCK=NONE;

--connection default

--reap

DELETE FROM t1;

set debug_sync= 'now signal goforit';

--connection con1

--reap

DROP TABLE t1;

set debug_sync= reset;

mysqltest: At line 20: query 'reap' failed: ER_KEY_NOT_FOUND (1032): Can't find record in 't1'

2022-07-03  0:59:18 5 [ERROR] mariadbd: Can't find record in 't1'

2022-07-03  0:59:18 5 [ERROR] Slave SQL: Could not execute Delete_rows_v1 event on table test.t1; Can't find record in 't1', Error_code: 1032; handler error HA_ERR_KEY_NOT_FOUND; the event's master log FIRST, end_log_pos 313, Internal MariaDB error code: 1032

2022-07-03  0:59:19 5 [Warning] Could not remove temporary table: './test/#sql-alter-155a5e-5', error: 0

mariadbd: /data/src/preview-10.10-online-alter-gcov/storage/innobase/trx/trx0trx.cc:377: void trx_t::free(): Assertion `!n_mysql_tables_in_use' failed.

220703  0:59:19 [ERROR] mysqld got signal 6 ;

mysqltest: At line 22: query 'DROP TABLE t1' failed: ER_LOCK_WAIT_TIMEOUT (1205): Lock wait timeout exceeded; try restarting transaction

Version: '10.10.0-MariaDB-debug-log'  socket: '/mnt8t/src/preview-10.10-online-alter-gcov/mysql-test/var/tmp/mysqld.1.sock'  port: 16000  Source distribution

mariadbd: /data/src/preview-10.10-online-alter-gcov/storage/innobase/trx/trx0trx.cc:377: void trx_t::free(): Assertion `!n_mysql_tables_in_use' failed.

220703  1:02:02 [ERROR] mysqld got signal 6 ;

--source include/have_innodb.inc

--source include/have_debug_sync.inc

CREATE TABLE t1 (a TEXT, UNIQUE(a)) ENGINE=InnoDB;

CREATE TABLE t2 (b TEXT, UNIQUE(b)) ENGINE=InnoDB;

INSERT INTO t2 VALUES (NULL),(NULL);

--send

  set debug_sync= 'now wait_for downgraded';

--connect (con1,localhost,root,,test)

set debug_sync= 'alter_table_online_downgraded signal downgraded wait_for goforit';

--send

ALTER TABLE t2 ADD COLUMN c INT, ALGORITHM=COPY, LOCK=NONE;

--connection default

--reap

DELETE FROM t2;

set debug_sync= 'now signal goforit';

--connection con1

--reap

--connection default

ALTER TABLE t2 FORCE;

ALTER TABLE t1 FORCE;

DROP TABLE t1, t2;

set debug_sync= reset;

connection default;

ALTER TABLE t2 FORCE;

Warnings:

Warning	1205	Lock wait timeout exceeded; try restarting transaction

ALTER TABLE t1 FORCE;

bug.dupkey3a 'innodb'                    [ fail ]

        Test ended at 2022-07-03 01:04:03

CURRENT_TEST: bug.dupkey3a

mysqltest: At line 25: query 'ALTER TABLE t1 FORCE' failed: <Unknown> (2013): Lost connection to server during query

mariadbd: /data/src/preview-10.10-online-alter-gcov/storage/innobase/row/row0mysql.cc:2675: dberr_t row_rename_table_for_mysql(const char*, const char*, trx_t*, bool): Assertion `err != DB_DUPLICATE_KEY' failed.

220703  1:04:02 [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: 10.10.0-MariaDB-debug-log

key_buffer_size=1048576

read_buffer_size=131072

max_used_connections=2

max_threads=153

thread_count=2

It is possible that mysqld could use up to 

key_buffer_size + (read_buffer_size + sort_buffer_size)*max_threads = 63909 K  bytes of memory

Hope that's ok; if not, decrease some variables in the equation.

Thread pointer: 0x7f7898000db8

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 = 0x7f78c0458e18 thread_stack 0x49000

mysys/stacktrace.c:212(my_print_stacktrace)[0x55cc7c8e24e1]

sql/signal_handler.cc:223(handle_fatal_signal)[0x55cc7b93f566]

sigaction.c:0(__restore_rt)[0x7f78ce3b1140]

linux/raise.c:51(__GI_raise)[0x7f78cdee2ce1]

stdlib/abort.c:81(__GI_abort)[0x7f78cdecc537]

intl/loadmsgcat.c:509(get_sysdep_segment_value)[0x7f78cdecc40f]

:0(__GI___assert_fail)[0x7f78cdedb662]

row/row0mysql.cc:2679(row_rename_table_for_mysql(char const*, char const*, trx_t*, bool))[0x55cc7c3a6ce3]

handler/ha_innodb.cc:13701(innobase_rename_table(trx_t*, char const*, char const*, bool))[0x55cc7c06255c]

handler/ha_innodb.cc:14100(ha_innobase::rename_table(char const*, char const*))[0x55cc7c065c91]

sql/handler.cc:5327(handler::ha_rename_table(char const*, char const*))[0x55cc7b9636c9]

sql/sql_table.cc:5126(mysql_rename_table(handlerton*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, st_mysql_const_unsigned_lex_string*, unsigned int))[0x55cc7b447532]

sql/sql_table.cc:11083(mysql_alter_table(THD*, st_mysql_const_lex_string const*, st_mysql_const_lex_string const*, Table_specification_st*, TABLE_LIST*, Alter_info*, unsigned int, st_order*, bool, bool))[0x55cc7b468520]

sql/sql_alter.cc:552(Sql_cmd_alter_table::execute(THD*))[0x55cc7b5bb2f1]

sql/sql_parse.cc:5996(mysql_execute_command(THD*, bool))[0x55cc7b25a2a7]

sql/sql_parse.cc:8036(mysql_parse(THD*, char*, unsigned int, Parser_state*))[0x55cc7b265c10]

sql/sql_parse.cc:1894(dispatch_command(enum_server_command, THD*, char*, unsigned int, bool))[0x55cc7b23cf11]

sql/sql_parse.cc:1407(do_command(THD*, bool))[0x55cc7b23a0ea]

sql/sql_connect.cc:1418(do_handle_one_connection(CONNECT*, bool))[0x55cc7b5a621b]

sql/sql_connect.cc:1312(handle_one_connection)[0x55cc7b5a5a22]

perfschema/pfs.cc:2203(pfs_spawn_thread)[0x55cc7beb4113]

nptl/pthread_create.c:478(start_thread)[0x7f78ce3a5ea7]

x86_64/clone.S:97(__GI___clone)[0x7f78cdfa4def]

Trying to get some variables.

Some pointers may be invalid and cause the dump to abort.

Query (0x7f7898015460): ALTER TABLE t1 FORCE

Connection ID (thread ID): 4

Status: NOT_KILLED

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 /dev/shm/var_auto_oLAo/mysqld.1/data

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        unlimited            unlimited            bytes     

Max resident set          unlimited            unlimited            bytes     

Max processes             385885               385885               processes 

Max open files            1024                 1024                 files     

Max locked memory         12659513344          12659513344          bytes     

Max address space         unlimited            unlimited            bytes     

Max file locks            unlimited            unlimited            locks     

Max pending signals       385885               385885               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

----------SERVER LOG END-------------