galera_3nodes.galera_ipv6_mariabackup_section MTR failed: assert_grep.inc failed

galera_3nodes.galera_ipv6_mariabackup_section 'innodb' w5 [ fail ]

        Test ended at 2020-04-07 07:10:00

CURRENT_TEST: galera_3nodes.galera_ipv6_mariabackup_section

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

included from /home/timofey_turenko_mariadb_com/MariaDBEnterprise/mysql-test/suite/galera_3nodes/t/galera_ipv6_mariabackup_section.test at line 72:

At line 152: assert_grep.inc failed.

The result from queries just before the failure was:

< snip >

connection node_2;

SET GLOBAL wsrep_provider_options='gmcast.isolate=0';

SELECT COUNT(*) = 1 FROM t1;

COUNT(*) = 1

1

DROP TABLE t1;

connection node_1;

include/assert_grep.inc [Streaming the backup to joiner at \[::1\]]

include/assert_grep.inc [async IST sender starting to serve tcp://\[::1\]:]

connection node_2;

include/assert_grep.inc [IST receiver addr using tcp://\[::1\]]

include/assert_grep.inc [Prepared IST receiver for 3-6, listening at: tcp://\[::1\]]

include/assert_grep.inc failed!

assert_text: 'Prepared IST receiver for 3-6, listening at: tcp://\[::1\]'

assert_file: '/var/tmp/mtr/5/log/mysqld.2.err'

assert_select: 'Prepared IST receiver for 3-6, listening at: tcp://\[::1\]'

assert_match: ''

assert_count: '1'

assert_only_after: 'CURRENT_TEST'

number of matching lines: 0

More results from queries before failure can be found in /var/tmp/mtr/5/log/galera_ipv6_mariabackup_section.log

 - saving '/var/tmp/mtr/5/log/galera_3nodes.galera_ipv6_mariabackup_section-innodb/' to '/var/tmp/mtr/log/galera_3nodes.galera_ipv6_mariabackup_section-innodb/'

Retrying test galera_3nodes.galera_ipv6_mariabackup_section, attempt(2/3)...