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mariadb/mysql-test/suite/binlog/r/binlog_truncate_active_log.result
Brandon Nesterenko eb4458e993 MDEV-33465: an option to enable semisync recovery 
The current semi-sync binlog fail-over recovery process uses
rpl_semi_sync_slave_enabled==TRUE as its condition to truncate a
primary server’s binlog, as it is anticipating the server to re-join
a replication topology as a replica. However, for servers configured
with both rpl_semi_sync_master_enabled=1 and
rpl_semi_sync_slave_enabled=1, if a primary is just re-started (i.e.
retaining its role as master), it can truncate its binlog to drop
transactions which its replica(s) has already received and executed.
If this happens, when the replica reconnects, its gtid_slave_pos can
be ahead of the recovered primary’s gtid_binlog_pos, resulting in an
error state where the replica’s state is ahead of the primary’s.

This patch changes the condition for semi-sync recovery to truncate
the binlog to instead use the configuration variable
--init-rpl-role, when set to SLAVE. This allows for both
rpl_semi_sync_master_enabled and rpl_semi_sync_slave_enabled to be
set for a primary that is restarted, and no transactions will be
lost, so long as --init-rpl-role is not set to SLAVE.

Reviewed By:
============
Sergei Golubchik <serg@mariadb.com>
2024-07-05 19:53:57 -06:00

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call mtr.add_suppression("Can.t init tc log");
call mtr.add_suppression("Aborting");
RESET MASTER;
SET @@global.sync_binlog=1;
CREATE TABLE t (f INT) ENGINE=INNODB;
CREATE TABLE t2 (f INT) ENGINE=INNODB;
CREATE TABLE t4 (f INT) ENGINE=INNODB;
CREATE TABLE tm (f INT) ENGINE=Aria;
# Case A.
connect master1,localhost,root,,;
connect master2,localhost,root,,;
connect master3,localhost,root,,;
connect master4,localhost,root,,;
connection default;
INSERT INTO t VALUES (10);
INSERT INTO tm VALUES (10);
connection master1;
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL master1_ready WAIT_FOR signal_never_arrives";
INSERT INTO t VALUES (20);
connection master2;
SET DEBUG_SYNC= "now WAIT_FOR master1_ready";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL master2_ready";
DELETE FROM t2 WHERE f = 0 /* no such record */;
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master2_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash';
Before the crash
0-1-8
connection master4;
SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL master4_ready WAIT_FOR signal_never_arrives";
INSERT INTO t4 VALUES (13);
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master4_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash and never logged trx';
Before the crash and never logged trx
0-1-8
connection default;
# Kill the server
disconnect master1;
disconnect master2;
disconnect master3;
disconnect master4;
# restart: --init-rpl-role=SLAVE --sync-binlog=1 --log-warnings=3
FOUND 1 /Successfully truncated.*to remove transactions starting from GTID 0-1-7/ in mysqld.1.err
Pre-crash binlog file content:
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000001 # Gtid # # GTID #-#-#
master-bin.000001 # Query # # use `test`; CREATE TABLE t (f INT) ENGINE=INNODB
master-bin.000001 # Gtid # # GTID #-#-#
master-bin.000001 # Query # # use `test`; CREATE TABLE t2 (f INT) ENGINE=INNODB
master-bin.000001 # Gtid # # GTID #-#-#
master-bin.000001 # Query # # use `test`; CREATE TABLE t4 (f INT) ENGINE=INNODB
master-bin.000001 # Gtid # # GTID #-#-#
master-bin.000001 # Query # # use `test`; CREATE TABLE tm (f INT) ENGINE=Aria
master-bin.000001 # Gtid # # BEGIN GTID #-#-#
master-bin.000001 # Query # # use `test`; INSERT INTO t VALUES (10)
master-bin.000001 # Xid # # COMMIT /* XID */
master-bin.000001 # Gtid # # BEGIN GTID #-#-#
master-bin.000001 # Query # # use `test`; INSERT INTO tm VALUES (10)
master-bin.000001 # Query # # COMMIT
SELECT @@global.gtid_binlog_pos as 'After the crash';
After the crash
0-1-6
"One row should be present in table 't'"
SELECT * FROM t;
f
10
"No row should be present in table 't4'"
SELECT * FROM t4;
f
DELETE FROM t;
# Case B.
connect master1,localhost,root,,;
connect master2,localhost,root,,;
connect master3,localhost,root,,;
connect master4,localhost,root,,;
connection default;
INSERT INTO t VALUES (10);
INSERT INTO tm VALUES (10);
connection master1;
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL master1_ready WAIT_FOR signal_never_arrives";
DELETE FROM t2 WHERE f = 0;
connection master2;
SET DEBUG_SYNC= "now WAIT_FOR master1_ready";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL master2_ready";
INSERT INTO t VALUES (20);
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master2_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash';
Before the crash
0-1-11
connection master4;
SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL master4_ready WAIT_FOR signal_never_arrives";
INSERT INTO t4 VALUES (13);
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master4_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash and never logged trx';
Before the crash and never logged trx
0-1-11
connection default;
# Kill the server
disconnect master1;
disconnect master2;
disconnect master3;
disconnect master4;
# restart: --init-rpl-role=SLAVE --sync-binlog=1 --log-warnings=3
FOUND 1 /Successfully truncated.*to remove transactions starting from GTID 0-1-11/ in mysqld.1.err
Pre-crash binlog file content:
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `test`; DELETE FROM t
master-bin.000002 # Xid # # COMMIT /* XID */
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `test`; INSERT INTO t VALUES (10)
master-bin.000002 # Xid # # COMMIT /* XID */
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `test`; INSERT INTO tm VALUES (10)
master-bin.000002 # Query # # COMMIT
master-bin.000002 # Gtid # # BEGIN GTID #-#-#
master-bin.000002 # Query # # use `test`; DELETE FROM t2 WHERE f = 0
master-bin.000002 # Query # # COMMIT
SELECT @@global.gtid_binlog_pos as 'After the crash';
After the crash
0-1-10
"One row should be present in table 't'"
SELECT * FROM t;
f
10
"No row should be present in table 't4'"
SELECT * FROM t4;
f
DELETE FROM t;
# Case C.
CREATE PROCEDURE sp_blank_xa()
BEGIN
XA START 'blank';
DELETE FROM t2 WHERE f = 0 /* no such record */;
XA END 'blank';
XA PREPARE 'blank';
END|
connect master1,localhost,root,,;
connect master2,localhost,root,,;
connect master3,localhost,root,,;
connect master4,localhost,root,,;
connection default;
INSERT INTO t VALUES (10);
INSERT INTO tm VALUES (10);
connection master1;
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL master1_ready WAIT_FOR signal_never_arrives";
INSERT INTO t VALUES (20);
connection master2;
SET DEBUG_SYNC= "now WAIT_FOR master1_ready";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL master2_ready";
CALL sp_blank_xa;
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master2_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash';
Before the crash
0-1-16
connection master4;
SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL master4_ready WAIT_FOR signal_never_arrives";
INSERT INTO t4 VALUES (13);
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master4_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash and never logged trx';
Before the crash and never logged trx
0-1-16
connection default;
# Kill the server
disconnect master1;
disconnect master2;
disconnect master3;
disconnect master4;
# restart: --init-rpl-role=SLAVE --sync-binlog=1 --log-warnings=3
FOUND 1 /Successfully truncated.*to remove transactions starting from GTID 0-1-15/ in mysqld.1.err
Pre-crash binlog file content:
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000003 # Gtid # # BEGIN GTID #-#-#
master-bin.000003 # Query # # use `test`; DELETE FROM t
master-bin.000003 # Xid # # COMMIT /* XID */
master-bin.000003 # Gtid # # GTID #-#-#
master-bin.000003 # Query # # use `test`; CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_blank_xa`()
BEGIN
XA START 'blank';
DELETE FROM t2 WHERE f = 0 /* no such record */;
XA END 'blank';
XA PREPARE 'blank';
END
master-bin.000003 # Gtid # # BEGIN GTID #-#-#
master-bin.000003 # Query # # use `test`; INSERT INTO t VALUES (10)
master-bin.000003 # Xid # # COMMIT /* XID */
master-bin.000003 # Gtid # # BEGIN GTID #-#-#
master-bin.000003 # Query # # use `test`; INSERT INTO tm VALUES (10)
master-bin.000003 # Query # # COMMIT
SELECT @@global.gtid_binlog_pos as 'After the crash';
After the crash
0-1-14
"One row should be present in table 't'"
SELECT * FROM t;
f
10
"No row should be present in table 't4'"
SELECT * FROM t4;
f
DELETE FROM t;
DROP PROCEDURE sp_blank_xa;
# Case D.
CREATE PROCEDURE sp_xa()
BEGIN
XA START 'xid';
DELETE FROM t WHERE f = 10;
XA END 'xid';
XA PREPARE 'xid';
END|
connect master1,localhost,root,,;
connect master2,localhost,root,,;
connect master3,localhost,root,,;
connect master4,localhost,root,,;
connection default;
INSERT INTO t VALUES (10);
INSERT INTO tm VALUES (10);
connection master1;
SET DEBUG_SYNC= "commit_before_get_LOCK_commit_ordered SIGNAL master1_ready WAIT_FOR signal_never_arrives";
CALL sp_xa;
connection master2;
SET DEBUG_SYNC= "now WAIT_FOR master1_ready";
SET DEBUG_SYNC= "commit_before_get_LOCK_after_binlog_sync SIGNAL master2_ready";
INSERT INTO t2 VALUES (20);
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master2_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash';
Before the crash
0-1-21
connection master4;
SET DEBUG_SYNC= "ha_commit_trans_before_log_and_order SIGNAL master4_ready WAIT_FOR signal_never_arrives";
INSERT INTO t4 VALUES (13);
connection master3;
SET DEBUG_SYNC= "now WAIT_FOR master4_ready";
SELECT @@global.gtid_binlog_pos as 'Before the crash and never logged trx';
Before the crash and never logged trx
0-1-21
connection default;
# Kill the server
disconnect master1;
disconnect master2;
disconnect master3;
disconnect master4;
# restart: --init-rpl-role=SLAVE --sync-binlog=1 --log-warnings=3
FOUND 1 /Successfully truncated.*to remove transactions starting from GTID 0-1-21/ in mysqld.1.err
Pre-crash binlog file content:
include/show_binlog_events.inc
Log_name Pos Event_type Server_id End_log_pos Info
master-bin.000004 # Gtid # # BEGIN GTID #-#-#
master-bin.000004 # Query # # use `test`; DELETE FROM t
master-bin.000004 # Xid # # COMMIT /* XID */
master-bin.000004 # Gtid # # GTID #-#-#
master-bin.000004 # Query # # use `test`; DROP PROCEDURE sp_blank_xa
master-bin.000004 # Gtid # # GTID #-#-#
master-bin.000004 # Query # # use `test`; CREATE DEFINER=`root`@`localhost` PROCEDURE `sp_xa`()
BEGIN
XA START 'xid';
DELETE FROM t WHERE f = 10;
XA END 'xid';
XA PREPARE 'xid';
END
master-bin.000004 # Gtid # # BEGIN GTID #-#-#
master-bin.000004 # Query # # use `test`; INSERT INTO t VALUES (10)
master-bin.000004 # Xid # # COMMIT /* XID */
master-bin.000004 # Gtid # # BEGIN GTID #-#-#
master-bin.000004 # Query # # use `test`; INSERT INTO tm VALUES (10)
master-bin.000004 # Query # # COMMIT
master-bin.000004 # Gtid # # XA START X'786964',X'',1 GTID #-#-#
master-bin.000004 # Query # # use `test`; DELETE FROM t WHERE f = 10
master-bin.000004 # Query # # XA END X'786964',X'',1
master-bin.000004 # XA_prepare # # XA PREPARE X'786964',X'',1
SELECT @@global.gtid_binlog_pos as 'After the crash';
After the crash
0-1-20
"One row should be present in table 't'"
SELECT * FROM t;
f
10
"No row should be present in table 't4'"
SELECT * FROM t4;
f
DELETE FROM t;
DROP PROCEDURE sp_xa;
# Cleanup
DROP TABLE t,t2,tm;
SET @@global.sync_binlog= default;
# End of the tests
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