*** MDEV-7326 Server deadlock in connection with parallel replication ***
include/master-slave.inc
[connection master]
connection server_2;
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
include/stop_slave.inc
SET GLOBAL slave_parallel_mode='conservative';
SET GLOBAL slave_parallel_threads=10;
CHANGE MASTER TO master_use_gtid=slave_pos;
include/start_slave.inc
connection server_1;
ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
CREATE TABLE t1 (a int PRIMARY KEY) ENGINE=MyISAM;
CREATE TABLE t2 (a int PRIMARY KEY) ENGINE=InnoDB;
CREATE TABLE t6 (a INT) ENGINE=MyISAM;
connection server_2;
connection server_1;
SET sql_log_bin=0;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
RETURN x;
END
||
SET sql_log_bin=1;
connection server_2;
SET sql_log_bin=0;
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
RETURNS INT DETERMINISTIC
BEGIN
IF d1 != '' THEN
SET debug_sync = d1;
END IF;
IF d2 != '' THEN
SET debug_sync = d2;
END IF;
RETURN x;
END
||
SET sql_log_bin=1;
connection server_2;
include/stop_slave.inc
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=3;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_xid";
include/start_slave.inc
connection server_1;
SET @old_format= @@SESSION.binlog_format;
SET binlog_format= STATEMENT;
INSERT INTO t1 VALUES (foo(50,
"rpl_parallel_start_waiting_for_prior SIGNAL t3_ready",
"rpl_parallel_end_of_group SIGNAL prep_ready WAIT_FOR prep_cont"));
connection server_2;
SET DEBUG_SYNC= "now WAIT_FOR prep_ready";
connection server_1;
INSERT INTO t2 VALUES (foo(50,
"rpl_parallel_simulate_temp_err_xid SIGNAL t1_ready1 WAIT_FOR t1_cont1",
"rpl_parallel_retry_after_unmark SIGNAL t1_ready2 WAIT_FOR t1_cont2"));
connection server_2;
SET DEBUG_SYNC= "now WAIT_FOR t1_ready1";
connection server_1;
INSERT INTO t1 VALUES (foo(51,
"rpl_parallel_before_mark_start_commit SIGNAL t2_ready1 WAIT_FOR t2_cont1",
"rpl_parallel_after_mark_start_commit SIGNAL t2_ready2"));
connection server_2;
SET DEBUG_SYNC= "now WAIT_FOR t2_ready1";
SET DEBUG_SYNC= "now SIGNAL t1_cont1";
SET DEBUG_SYNC= "now WAIT_FOR t1_ready2";
connection server_1;
INSERT INTO t1 VALUES (52);
SET BINLOG_FORMAT= @old_format;
SELECT * FROM t2 WHERE a>=50 ORDER BY a;
a
50
SELECT * FROM t1 WHERE a>=50 ORDER BY a;
a
50
51
52
connection server_2;
SET DEBUG_SYNC= "now SIGNAL prep_cont";
SET DEBUG_SYNC= "now WAIT_FOR t3_ready";
SET DEBUG_SYNC= "now SIGNAL t2_cont1";
SET DEBUG_SYNC= "now WAIT_FOR t2_ready2";
SET DEBUG_SYNC= "now SIGNAL t1_cont2";
connection server_1;
connection server_2;
SELECT * FROM t2 WHERE a>=50 ORDER BY a;
a
50
SELECT * FROM t1 WHERE a>=50 ORDER BY a;
a
50
51
52
SET DEBUG_SYNC="reset";
include/stop_slave.inc
SET GLOBAL debug_dbug=@old_dbug;
SET GLOBAL slave_parallel_mode=@old_parallel_mode;
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=10;
include/start_slave.inc
*** MDEV-7326 Server deadlock in connection with parallel replication ***
connect  con_temp3,127.0.0.1,root,,test,$SERVER_MYPORT_1,;
connect  con_temp4,127.0.0.1,root,,test,$SERVER_MYPORT_1,;
connection server_2;
include/stop_slave.inc
SET @old_parallel_mode= @@GLOBAL.slave_parallel_mode;
SET GLOBAL slave_parallel_mode='conservative';
SET GLOBAL slave_parallel_threads=0;
SET GLOBAL slave_parallel_threads=3;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_xid";
include/start_slave.inc
connection server_1;
SET @old_format= @@SESSION.binlog_format;
SET binlog_format= STATEMENT;
INSERT INTO t1 VALUES (foo(60,
"rpl_parallel_start_waiting_for_prior SIGNAL t3_ready",
"rpl_parallel_end_of_group SIGNAL prep_ready WAIT_FOR prep_cont"));
connection server_2;
SET DEBUG_SYNC= "now WAIT_FOR prep_ready";
connection server_1;
INSERT INTO t2 VALUES (foo(60,
"rpl_parallel_simulate_temp_err_xid SIGNAL t1_ready1 WAIT_FOR t1_cont1",
"rpl_parallel_retry_after_unmark SIGNAL t1_ready2 WAIT_FOR t1_cont2"));
connection server_2;
SET DEBUG_SYNC= "now WAIT_FOR t1_ready1";
connection con_temp3;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued1 WAIT_FOR master_cont1';
SET binlog_format=statement;
INSERT INTO t1 VALUES (foo(61,
"rpl_parallel_before_mark_start_commit SIGNAL t2_ready1 WAIT_FOR t2_cont1",
"rpl_parallel_after_mark_start_commit SIGNAL t2_ready2"));
connection server_1;
SET debug_sync='now WAIT_FOR master_queued1';
connection con_temp4;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued2';
INSERT INTO t6 VALUES (62);
connection server_1;
SET debug_sync='now WAIT_FOR master_queued2';
SET debug_sync='now SIGNAL master_cont1';
connection con_temp3;
connection con_temp4;
connection server_1;
SET debug_sync='RESET';
SET BINLOG_FORMAT= @old_format;
SELECT * FROM t2 WHERE a>=60 ORDER BY a;
a
60
SELECT * FROM t1 WHERE a>=60 ORDER BY a;
a
60
61
SELECT * FROM t6 WHERE a>=60 ORDER BY a;
a
62
connection server_2;
SET DEBUG_SYNC= "now WAIT_FOR t2_ready1";
SET DEBUG_SYNC= "now SIGNAL t1_cont1";
SET DEBUG_SYNC= "now WAIT_FOR t1_ready2";
connection server_2;
SET DEBUG_SYNC= "now SIGNAL prep_cont";
SET DEBUG_SYNC= "now WAIT_FOR t3_ready";
SET DEBUG_SYNC= "now SIGNAL t2_cont1";
SET DEBUG_SYNC= "now WAIT_FOR t2_ready2";
SET DEBUG_SYNC= "now SIGNAL t1_cont2";
connection server_1;
connection server_2;
SELECT * FROM t2 WHERE a>=60 ORDER BY a;
a
60
SELECT * FROM t1 WHERE a>=60 ORDER BY a;
a
60
61
SELECT * FROM t6 WHERE a>=60 ORDER BY a;
a
62
SET DEBUG_SYNC="reset";
include/stop_slave.inc
SET GLOBAL debug_dbug=@old_dbug;
SET GLOBAL slave_parallel_mode=@old_parallel_mode;
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
include/start_slave.inc
connection server_1;
DROP function foo;
DROP TABLE t1,t2,t6;
disconnect con_temp3;
disconnect con_temp4;
SET DEBUG_SYNC= 'RESET';
include/rpl_end.inc