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sporadic failures of main.mdl_sync

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main.mdl_sync 'innodb'                   w32 [ fail ]
        Test ended at 2024-04-06 14:11:15

CURRENT_TEST: main.mdl_sync
--- main/mdl_sync.result
+++ main/mdl_sync.reject
@@ -2458,6 +2458,7 @@
 SELECT LOCK_MODE, LOCK_TYPE, TABLE_SCHEMA, TABLE_NAME FROM information_schema.metadata_lock_info;
 LOCK_MODE	LOCK_TYPE	TABLE_SCHEMA	TABLE_NAME
 MDL_BACKUP_FTWRL2	Backup lock
+MDL_SHARED	Table metadata lock	test	t2
 unlock tables;
 connection default;
 # Reaping UPDATE
This commit is contained in:
Sergei Golubchik
2024-04-06 23:05:57 +02:00
parent 12d448fde9
commit a7bf0a42d0
2 changed files with 11 additions and 0 deletions
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4
mysql-test/main/mdl_sync.result
View File

@ -2433,6 +2433,9 @@ create table t1 (a int) engine=myisam;
create table t2 (a int) stats_persistent=0, engine=innodb;
insert into t1 values (1);
insert into t2 values (1);
connect con1, localhost, root;
start transaction with consistent snapshot;
connection default;
SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL table_opened WAIT_FOR grlwait execute 2';
update t1,t2 set t1.a=2,t2.a=3;
connection con2;
@ -2464,6 +2467,7 @@ connection default;
SET DEBUG_SYNC= 'RESET';
drop table t1,t2;
disconnect con2;
disconnect con1;
#
# Bug#50786 Assertion `thd->mdl_context.trans_sentinel() == __null'
# failed in open_ltable()

7
mysql-test/main/mdl_sync.test
View File

@ -3117,6 +3117,12 @@ create table t2 (a int) stats_persistent=0, engine=innodb;
insert into t1 values (1);
insert into t2 values (1);
connect (con1, localhost, root);
# disable innodb purge thread, otherwise it might start purging t2,
# and will take an mdl, affecting metadata_lock_info output.
start transaction with consistent snapshot;
connection default;
SET DEBUG_SYNC= 'after_open_table_mdl_shared SIGNAL table_opened WAIT_FOR grlwait execute 2';
--send update t1,t2 set t1.a=2,t2.a=3
@ -3162,6 +3168,7 @@ connection default;
SET DEBUG_SYNC= 'RESET';
drop table t1,t2;
disconnect con2;
disconnect con1;
--echo #
--echo # Bug#50786 Assertion `thd->mdl_context.trans_sentinel() == __null'