mariadb/mysql-test/suite/rpl/t/rpl_old_master.test
Kristian Nielsen 214e6c5b3d Fix sporadic failure of test case rpl.rpl_old_master
Remove the test for MDEV-14528. This is supposed to test that parallel
replication from pre-10.0 master will update Seconds_Behind_Master. But
after MDEV-12179 the SQL thread is blocked from even beginning to fetch
events from the relay log due to FLUSH TABLES WITH READ LOCK, so the test
case is no longer testing what is was intended to. And pre-10.0 versions are
long since out of support, so does not seem worthwhile to try to rewrite the
test to work another way.

The root cause of the test failure is MDEV-34778. Briefly, depending on
exact timing during slave stop, the rli->sql_thread_caught_up flag may end
up with different value. If it ends up as "true", this causes
Seconds_Behind_Master to be 0 during next slave start; and this caused test
case timeout as the test was waiting for Seconds_Behind_Master to become
non-zero.

Signed-off-by: Kristian Nielsen <knielsen@knielsen-hq.org>
2024-08-26 14:39:24 +02:00

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1.3 KiB
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# Test replicating off old master.
# We simulate old master by copying in pre-generated binlog files from earlier
# server versions.
--source include/have_innodb.inc
--source include/master-slave.inc
--connection slave
--source include/stop_slave.inc
--connection master
--let $datadir= `SELECT @@datadir`
--let $rpl_server_number= 1
--source include/rpl_stop_server.inc
--remove_file $datadir/master-bin.000001
--copy_file $MYSQL_TEST_DIR/std_data/mariadb-5.5-binlog.000001 $datadir/master-bin.000001
--let $rpl_server_number= 1
--source include/rpl_start_server.inc
--source include/wait_until_connected_again.inc
--connection slave
SET @old_parallel= @@GLOBAL.slave_parallel_threads;
SET GLOBAL slave_parallel_threads=10;
--replace_result $SERVER_MYPORT_1 SERVER_MYPORT_1
eval CHANGE MASTER TO master_host='127.0.0.1', master_port=$SERVER_MYPORT_1, master_user='root', master_log_file='master-bin.000001', master_log_pos=4;
--source include/start_slave.inc
--connection master
CREATE TABLE t2 (a INT PRIMARY KEY) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1);
--save_master_pos
--connection slave
--sync_with_master
SELECT * FROM t1 ORDER BY a;
SELECT * FROM t2;
--source include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel;
DROP TABLE t1;
--source include/start_slave.inc
--connection master
DROP TABLE t2;
--source include/rpl_end.inc