Found wrong usage of mutex 'LOCK_thd_kill' and 'LOCK_wsrep_server_state

 galera_sr.mysql-wsrep-features#27 (Failed 4 times in the last 30 runs. Flakiness: 24%, Stability: 86%)

 Stack Trace

CREATE TABLE t1 (f1 INTEGER PRIMARY KEY) ENGINE=InnoDB;

SET SESSION wsrep_trx_fragment_size = 1;

SET AUTOCOMMIT=OFF;

START TRANSACTION;

INSERT INTO t1 VALUES (1);

INSERT INTO t1 VALUES (2);

INSERT INTO t1 VALUES (3);

INSERT INTO t1 VALUES (4);

INSERT INTO t1 VALUES (5);

connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1;

ALTER TABLE t1 ADD COLUMN f2 INTEGER;

connection node_2;

SET SESSION wsrep_sync_wait = 0;

SELECT COUNT(*) = 0 FROM t1;

COUNT(*) = 0

1

connection node_1;

COMMIT;

ERROR 40001: Deadlock found when trying to get lock; try restarting transaction

DROP TABLE t1;

line

safe_mutex: Found wrong usage of mutex 'LOCK_thd_kill' and 'LOCK_wsrep_server_state'

^ Found warnings in /var/tmp/mtr/2/log/mysqld.1.err