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MDEV-36116: Remove debug assert in TOI when executing thread is killed

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Signed-off-by: Julius Goryavsky <julius.goryavsky@mariadb.com>
This commit is contained in:
Denis Protivensky
2025-02-18 16:09:44 +03:00
committed by Julius Goryavsky
parent d698b784c8
commit dd54ce9e10
3 changed files with 67 additions and 1 deletions
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22
mysql-test/suite/galera/r/MDEV-36116.result Normal file
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@@ -0,0 +1,22 @@
connection node_2;
connection node_1;
connect con1,127.0.0.1,root,,test,$NODE_MYPORT_1;
connection node_1;
CALL mtr.add_suppression("CREATE TABLE isolation failure");
SET DEBUG_SYNC = 'wsrep_kill_thd_before_enter_toi SIGNAL may_kill WAIT_FOR continue';
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR may_kill';
SET DEBUG_SYNC = 'now SIGNAL continue';
connection node_1;
ERROR HY000: Lost connection to MySQL server during query
connection node_2;
SHOW TABLES LIKE 't1';
Tables_in_test (t1)
connection con1;
SHOW TABLES LIKE 't1';
Tables_in_test (t1)
SET DEBUG_SYNC = 'RESET';
disconnect con1;
disconnect node_2;
disconnect node_1;

43
mysql-test/suite/galera/t/MDEV-36116.test Normal file
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@@ -0,0 +1,43 @@
#
# MDEV-36116: TOI crashes in debug assert if executing thread is killed.
#
--source include/galera_cluster.inc
--source include/have_innodb.inc
--source include/have_debug_sync.inc
--source include/have_debug.inc
--connect con1,127.0.0.1,root,,test,$NODE_MYPORT_1
# Start TOI operation and wait for the thread to be killed.
--connection node_1
CALL mtr.add_suppression("CREATE TABLE isolation failure");
--let $connection_id = `SELECT CONNECTION_ID()`
SET DEBUG_SYNC = 'wsrep_kill_thd_before_enter_toi SIGNAL may_kill WAIT_FOR continue';
--send
CREATE TABLE t1 (a INT) ENGINE=InnoDB;
# Kill the thread and let it continue.
--connection con1
SET DEBUG_SYNC = 'now WAIT_FOR may_kill';
--disable_query_log
--eval KILL CONNECTION $connection_id
--enable_query_log
SET DEBUG_SYNC = 'now SIGNAL continue';
--connection node_1
--error 2013
--reap
# Verify no tables created on either nodes.
--connection node_2
SHOW TABLES LIKE 't1';
--connection con1
SHOW TABLES LIKE 't1';
# Cleanup
SET DEBUG_SYNC = 'RESET';
--disconnect con1
--source include/galera_end.inc

3
sql/wsrep_mysqld.cc
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@@ -2625,12 +2625,13 @@ int wsrep_to_isolation_begin(THD *thd, const char *db_, const char *table_,
const wsrep::key_array *fk_tables,
const HA_CREATE_INFO *create_info)
{
DEBUG_SYNC(thd, "wsrep_kill_thd_before_enter_toi");
mysql_mutex_lock(&thd->LOCK_thd_kill);
const killed_state killed = thd->killed;
mysql_mutex_unlock(&thd->LOCK_thd_kill);
if (killed)
{
DBUG_ASSERT(FALSE);
/* The thread may have been killed as a result of memory pressure. */
return -1;
}