galera_3nodes.galera_ipv6_mysqldump: rare random crashes during shutdown

galera_3nodes.galera_ipv6_mysqldump 'innodb' w2 [ fail ]

        Test ended at 2020-10-22 06:17:57

CURRENT_TEST: galera_3nodes.galera_ipv6_mysqldump

mysqltest: In included file "./include/shutdown_mysqld.inc": 

included from ./include/restart_mysqld.inc at line 10:

included from /usr/share/mysql/mysql-test/suite/galera_3nodes/t/galera_ipv6_mysqldump.test at line 84:

At line 40: mysql_shutdown failed

The result from queries just before the failure was:

< snip >

connection node_1;

CREATE USER 'sst';

GRANT ALL PRIVILEGES ON *.* TO 'sst';

SET GLOBAL wsrep_sst_auth = 'sst:';

connection node_2;

SET GLOBAL wsrep_sst_method = 'mysqldump';

Shutting down server ...

connection node_1;

Cleaning var directory ...

CREATE TABLE t1 (f1 INTEGER NOT NULL PRIMARY KEY) ENGINE=InnoDB;

INSERT INTO t1 VALUES (1);

connection node_2;

Starting server ...

SELECT COUNT(*) AS EXPECT_1 FROM t1;

EXPECT_1

1

DROP TABLE t1;

SELECT VARIABLE_VALUE LIKE '%[::1]%' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_incoming_addresses';

VARIABLE_VALUE LIKE '%[::1]%'

1

More results from queries before failure can be found in /dev/shm/var/2/log/galera_ipv6_mysqldump.log

 - saving '/dev/shm/var/2/log/galera_3nodes.galera_ipv6_mysqldump-innodb/' to '/dev/shm/var/log/galera_3nodes.galera_ipv6_mysqldump-innodb/'

Retrying test galera_3nodes.galera_ipv6_mysqldump, attempt(2/3)...

worker[2] > Restart  - not started

worker[2] > Restart  - not started

worker[2] > Restart  - not started

galera_3nodes.galera_ipv6_mariabackup_section 'innodb' w1 [ pass ]  13629

2020-10-22  6:17:56 2 [Note] WSREP: Non-primary view

2020-10-22  6:17:56 2 [Note] WSREP: Server status change disconnecting -> disconnected

2020-10-22  6:17:56 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.

2020-10-22  6:17:56 2 [Note] WSREP: wsrep_notify_cmd is not defined, skipping notification.

2020-10-22  6:17:56 2 [Note] WSREP: Applier thread exiting ret: 0 thd: 2

2020-10-22  6:17:56 2 [Warning] Aborted connection 2 to db: 'unconnected' user: 'unauthenticated' host: '' (This connection closed normally without authentication)

2020-10-22  6:17:56 0 [Note] WSREP: killing local connection: 13