mariabackup.slave_provision_nolock test failure - no progress in LSN read - 5 second timeout reached

00] 2026-01-23 17:57:08 Retrying read of log at LSN=48517

[00] 2026-01-23 17:57:09 Retrying read of log at LSN=48517

[00] 2026-01-23 17:57:10 Was only able to copy log from 48517 to 48517, not 226806197; try increasing innodb_log_file_size

mariabackup: Stopping log copying thread[00] 2026-01-23 17:57:10 Retrying read of log at LSN=48517

.

mysqltest: At line 100: exec of '/data/buildbot/workers/prod/amd64-freebsd-14/build/extra/mariabackup/mariabackup --defaults-file=/data/buildbot/workers/prod/amd64-freebsd-14/build/mysql-test/var/3/my.cnf --backup --target-dir=/data/buildbot/workers/prod/amd64-freebsd-14/build/mysql-test/var/3/tmp/backup --no-lock' failed, error: 256, status: 1, errno: 22

Output from before failure:

*** Doing backup...

The result from queries just before the failure was:

call mtr.add_suppression("Can't init tc log");

call mtr.add_suppression("Aborting");

# restart

RESET MASTER;

CREATE TABLE t1(a varchar(60) PRIMARY KEY, b VARCHAR(60)) ENGINE INNODB;

INSERT INTO t1 VALUES(1, NULL);

CREATE TABLE t2 (val INT) ENGINE=InnoDB;

INSERT INTO t2 VALUES (0);

connect  con1,localhost,root,,;

*** Start a background load...

CALL gen_load();

connection default;

*** Doing backup...