galera.galera_myisam_autocommit fails: Failed to start mysqld.2

galera.galera_myisam_autocommit fails with Failed to start mysqld.2 on the 10.11, 11.4, 11.8, 12.3, 13.1 and main (13.2) branches.

Build Run Info

Failure text

Latest run on 11.4 (worker number, timestamps and paths differ between runs; the other release branch runs show the same message):

galera.galera_myisam_autocommit 'binlogon' w13 [ fail ]

        Test ended at 2026-10-18 04:54:59

CURRENT_TEST: galera.galera_myisam_autocommit

Failed to start mysqld.2

mysqltest failed but provided no output

 - skipping '/home/buildbot/ppc64le-ubuntu-2204/build/mysql-test/var/13/log/galera.galera_myisam_autocommit-binlogon/'

Retrying test galera.galera_myisam_autocommit, attempt(2/3)...

Analysis

Two builders are affected: ppc64le-ubuntu-2204 (10.11, 11.4, 11.8, 12.3, main) and aarch64-debian-12 (10.11, 11.4, 11.8, 12.3, 13.1, main). Between 2026-10-12 and 2026-10-18 the failure was recorded 46 times, all on these two builders: 19 rows on release branches and 27 on PR and bb-/st- branches. The buildbot text is the same in all 46 rows apart from worker number, timestamps and paths, and a {{ - skipping}} line instead of {{ - saving}} in 14 of them. Each of the 19 release branch runs also failed galera.galera_partitioned_tables (MDEV-40688) and galera.MDEV-27862 (MDEV-40355) with the same message, and 18 of them also failed galera.galera_forced_binlog_format (MDEV-41488). MDEV-40688 traces the message on galera.galera_partitioned_tables to the joining node's wsrep_sst_rsync exiting with 2 (No such file or directory); PR 5603 for that ticket skips galera tests when wsrep SST prerequisites are missing and is not merged. MDEV-40355 describes several unrelated tests failing at the same instant under --parallel=14 when the SST joiners fail to establish quorum together, and lists this test among them (build 46683, 2026-10-08).

Created via the mtr-failure-create-bug skill.