galera.lp1376747-4 MTR failed: Unknown MySQL error

galera.lp1376747-4 'innodb'              w1 [ fail ]

        Test ended at 2020-03-10 10:50:30

CURRENT_TEST: galera.lp1376747-4

mysqltest: At line 39: query 'SHOW CREATE TABLE t1' failed: 2000: Unknown MySQL error

The result from queries just before the failure was:

< snip >

Warning	1287	'@@wsrep_causal_reads' is deprecated and will be removed in a future release. Please use '@@wsrep_sync_wait=1' instead

FLUSH TABLE WITH READ LOCK;

connection node_1;

ALTER TABLE t1 ADD COLUMN f2 INTEGER;

INSERT INTO t1 VALUES (2,3);

connection node_2a;

SET session wsrep_sync_wait=0;

SET session wsrep_causal_reads=OFF;

Warnings:

Warning	1287	'@@wsrep_causal_reads' is deprecated and will be removed in a future release. Please use '@@wsrep_sync_wait=1' instead

SHOW CREATE TABLE t1;

Table	Create Table

t1	CREATE TABLE `t1` (

  `id` int(11) NOT NULL,

  PRIMARY KEY (`id`)

) ENGINE=InnoDB DEFAULT CHARSET=latin1

FLUSH TABLES t1 WITH READ LOCK;;

connection node_2;

UNLOCK TABLES;

SHOW CREATE TABLE t1;

More results from queries before failure can be found in /dev/shm/var/1/log/lp1376747-4.log

 - saving '/dev/shm/var/1/log/galera.lp1376747-4-innodb/' to '/dev/shm/var/log/galera.lp1376747-4-innodb/'

Retrying test galera.lp1376747-4, attempt(2/3)...

worker[1] > Restart  - not started

worker[1] > Restart  - not started