mariadb/mysql-test/suite/rpl/t/rpl_parallel_retry.test

--source include/have_innodb.inc
--source include/have_debug.inc
--source include/have_debug_sync.inc
--let $rpl_topology=1->2
--source include/rpl_init.inc

--echo *** Test retry of transactions that fail to replicate due to deadlock or similar temporary error. ***

--connection server_1
ALTER TABLE mysql.gtid_slave_pos ENGINE=InnoDB;
CREATE TABLE t1 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1,1);
--save_master_pos

# Use a stored function to inject a debug_sync into the appropriate THD.
# The function does nothing on the master, and on the slave it injects the
# desired debug_sync action(s).
SET sql_log_bin=0;
--delimiter ||
CREATE FUNCTION foo(x INT, d1 VARCHAR(500), d2 VARCHAR(500))
  RETURNS INT DETERMINISTIC
  BEGIN
    RETURN x;
  END
||
--delimiter ;
SET sql_log_bin=1;

--connection server_2
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
--source include/stop_slave.inc
SET GLOBAL slave_parallel_threads=5;
--source include/start_slave.inc
--sync_with_master
SET sql_log_bin=0;
--delimiter ||
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
||
--delimiter ;
SET sql_log_bin=1;
--source include/stop_slave.inc

--connection server_1
SET gtid_seq_no = 100;
BEGIN;
INSERT INTO t1 VALUES (2,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (3,1);
COMMIT;
SELECT * FROM t1 ORDER BY a;
--save_master_pos

--connection server_2
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--source include/start_slave.inc
--sync_with_master
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log

SELECT * FROM t1 ORDER BY a;


--echo *** Test that double retry works when the first retry also fails with temp error ***
--source include/stop_slave.inc

--connection server_1
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 10;
BEGIN;
INSERT INTO t1 VALUES (4,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (5,1);
INSERT INTO t1 VALUES (6,1);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 ORDER BY a;
--save_master_pos

--connection server_2
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100,rpl_parallel_simulate_double_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--source include/start_slave.inc
--sync_with_master
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log

SELECT * FROM t1 ORDER BY a;


--echo *** Test too many retries, eventually causing failure. ***
--source include/stop_slave.inc

--connection server_1
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 11;
BEGIN;
INSERT INTO t1 VALUES (7,1);
UPDATE t1 SET b=b+1 WHERE a=1;
INSERT INTO t1 VALUES (8,1);
INSERT INTO t1 VALUES (9,1);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 ORDER BY a;
--save_master_pos

--connection server_2
SET sql_log_bin=0;
CALL mtr.add_suppression("Slave worker thread retried transaction 10 time\\(s\\) in vain, giving up");
CALL mtr.add_suppression("Slave: Deadlock found when trying to get lock; try restarting transaction");
CALL mtr.add_suppression("Slave worker thread retried transaction .* in vain, giving up");
SET sql_log_bin=1;

SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100,rpl_parallel_simulate_infinite_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
START SLAVE;
--let $slave_sql_errno= 1213
--source include/wait_for_slave_sql_error.inc
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log

SELECT * FROM t1 ORDER BY a;
STOP SLAVE IO_THREAD;
--source include/start_slave.inc
--sync_with_master
SELECT * FROM t1 ORDER BY a;

--echo *** Test retry of event group that spans multiple relay log files. ***

--connection server_1
CREATE TABLE t2 (a int PRIMARY KEY, b BLOB) ENGINE=InnoDB;
INSERT INTO t2 VALUES (1,"Hulubullu");
--save_master_pos

--connection server_2
--sync_with_master
--source include/stop_slave.inc
SET @old_max= @@GLOBAL.max_relay_log_size;
SET GLOBAL max_relay_log_size=4096;

--connection server_1
--let $big= `SELECT REPEAT("*", 5000)`
SET gtid_seq_no = 100;
SET @old_server_id = @@server_id;
SET server_id = 12;
BEGIN;
--disable_query_log
eval INSERT INTO t2 VALUES (2, CONCAT("Hello ", "$big"));
eval INSERT INTO t2 VALUES (3, CONCAT("Long data:  ", "$big"));
--enable_query_log
INSERT INTO t1 VALUES (10, 4);
COMMIT;
SET server_id = @old_server_id;
SELECT * FROM t1 WHERE a >= 10 ORDER BY a;
SELECT a, LENGTH(b) FROM t2 ORDER BY a;
--save_master_pos

--connection server_2
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_gtid_0_x_100";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--source include/start_slave.inc
--sync_with_master
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log

SELECT * FROM t1 WHERE a >= 10 ORDER BY a;
SELECT a, LENGTH(b) FROM t2 ORDER BY a;

--connection server_1
INSERT INTO t1 VALUES (11,11);
--disable_query_log
eval INSERT INTO t2 VALUES (4, "$big");
--enable_query_log
--save_master_pos

--connection server_2
--sync_with_master
SELECT * FROM t1 WHERE a >= 10 ORDER BY a;
SELECT a, LENGTH(b) FROM t2 ORDER BY a;
SET GLOBAL max_relay_log_size=@old_max;


--echo *** MDEV-7065: Incorrect relay log position in parallel replication after retry of transaction ***

--connection server_2
--source include/stop_slave.inc

--connection server_1
BEGIN;
INSERT INTO t1 VALUES (100, 0);
INSERT INTO t1 VALUES (101, 0);
INSERT INTO t1 VALUES (102, 0);
INSERT INTO t1 VALUES (103, 0);
COMMIT;
SELECT * FROM t1 WHERE a >= 100 ORDER BY a;
--save_master_pos

--connection server_2
# Inject a DBUG error insert to cause the XID event of the single transaction
# from the master to fail with a deadlock error and be retried.
# The bug was that the retry of the XID would leave the relay log position
# incorrect (off by the size of XID event).
SET @old_dbug= @@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,rpl_parallel_simulate_temp_err_xid";
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--source include/start_slave.inc
--sync_with_master
SET GLOBAL debug_dbug=@old_dbug;
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry AS retries;
--enable_query_log

SELECT * FROM t1 WHERE a >= 100 ORDER BY a;
# Stop the SQL thread. When the bug was there to give the incorrect relay log
# position, the restart of the SQL thread would read garbage data from the
# middle of an event and fail with relay log IO error.
--source include/stop_slave_sql.inc

--connection server_1
INSERT INTO t1 VALUES (104, 1);
INSERT INTO t1 VALUES (105, 1);
INSERT INTO t1 VALUES (106, 1);
INSERT INTO t1 VALUES (107, 1);
INSERT INTO t1 VALUES (108, 1);
INSERT INTO t1 VALUES (109, 1);
--save_master_pos

--connection server_2
--source include/start_slave.inc
--sync_with_master
SELECT * FROM t1 WHERE a >= 100 ORDER BY a;


--echo *** MDEV-6917: Parallel replication: "Commit failed due to failure of an earlier commit on which this one depends", but no prior failure seen **

--connection server_1
CREATE TABLE t3 (a INT PRIMARY KEY, b INT, KEY b_idx(b)) ENGINE=InnoDB;
INSERT INTO t3 VALUES (1,NULL), (2,2), (3,NULL), (4,4), (5, NULL), (6, 6);
CREATE TABLE t4 (a INT PRIMARY KEY, b INT) ENGINE=InnoDB;

# We need statement binlog format to be able to inject debug_sync statements
# on the slave with calls to foo().
SET @old_format= @@SESSION.binlog_format;
SET binlog_format='statement';
--save_master_pos

--connection server_2
--sync_with_master
--source include/stop_slave.inc
CHANGE MASTER TO master_use_gtid=no;

--connection server_1

# Create a group commit with three transactions T1, T2, T3.
# T2 will block T1 on the slave where we will make it run first, so it will be
# deadlock killed.
# The bug was that in this case, T3 was signalled to fail due to T2 failing,
# even though the retry of T2 was later successful.

--connect (con1,127.0.0.1,root,,test,$SERVER_MYPORT_1,)
SET @old_format= @@SESSION.binlog_format;
SET binlog_format='statement';
BEGIN;
INSERT INTO t4 VALUES (10, foo(1, 'before_execute_sql_command WAIT_FOR t1_start', ''));
UPDATE t3 SET b=NULL WHERE a=6;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued1 WAIT_FOR master_cont1';
send COMMIT;
--connection server_1
SET debug_sync='now WAIT_FOR master_queued1';

--connect (con2,127.0.0.1,root,,test,$SERVER_MYPORT_1,)
SET @old_format= @@SESSION.binlog_format;
SET binlog_format='statement';
BEGIN;
INSERT INTO t4 VALUES (20, foo(2, 'group_commit_waiting_for_prior SIGNAL t2_waiting', ''));
DELETE FROM t3 WHERE b <= 3;
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued2';
send COMMIT;

--connection server_1
SET debug_sync='now WAIT_FOR master_queued2';

--connect (con3,127.0.0.1,root,,test,$SERVER_MYPORT_1,)
SET @old_format= @@SESSION.binlog_format;
SET binlog_format='statement';
BEGIN;
INSERT INTO t4 VALUES (30, foo(3, 'before_execute_sql_command WAIT_FOR t3_start', 'group_commit_waiting_for_prior SIGNAL t3_waiting'));
INSERT INTO t3 VALUES (7,7);
SET debug_sync='commit_after_release_LOCK_prepare_ordered SIGNAL master_queued3';
send COMMIT;

--connection server_1
SET debug_sync='now WAIT_FOR master_queued3';
SET debug_sync='now SIGNAL master_cont1';

--connection con1
REAP;
SET binlog_format=@old_format;
--connection con2
REAP;
SET binlog_format=@old_format;
--connection con3
REAP;
SET debug_sync='RESET';
SET binlog_format=@old_format;

--connection server_1
--save_master_pos
SELECT * FROM t3 ORDER BY a;


--connection server_2
let $old_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
SET @old_dbug=@@GLOBAL.debug_dbug;
SET GLOBAL debug_dbug="+d,thd_need_ordering_with_force";
--source include/start_slave.inc
# First, wait for T2 to complete up to where it is waiting for T1 to group
# commit for both of them. This will set locks that will block T1, causing
# a deadlock kill and retry of T2. T1 and T3 are still blocked at the start
# of each their SQL statements.
SET debug_sync='now WAIT_FOR t2_waiting';
# Now let T3 move on until the point where it is itself ready to commit.
SET debug_sync='now SIGNAL t3_start';
SET debug_sync='now WAIT_FOR t3_waiting';
# Now T2 and T3 are set up, so we can let T1 proceed.
SET debug_sync='now SIGNAL t1_start';
# Now we can wait for the slave to catch up.
# We should see T2 being deadlock killed and retried.
# The bug was that T2 deadlock kill would cause T3 to fail due to failure
# of an earlier commit. This is wrong as T2 did not fail, it was only
# retried.
--sync_with_master
SET GLOBAL debug_dbug=@old_dbug;
SET debug_sync='RESET';
let $new_retry= query_get_value(SHOW STATUS LIKE 'Slave_retried_transactions', Value, 1);
--disable_query_log
eval SELECT $new_retry - $old_retry >= 1 AS retries;
--enable_query_log
SELECT * FROM t3 ORDER BY a;


--connection server_1
SET binlog_format=@old_format;


# Clean up of the above part.
--connection server_2
--source include/stop_slave.inc
SET GLOBAL slave_parallel_threads=@old_parallel_threads;
--source include/start_slave.inc

--connection server_1
DROP TABLE t1, t2, t3, t4;
DROP function foo;

--sync_slave_with_master server_2

#
# MDEV-12746 rpl.rpl_parallel_optimistic_nobinlog fails committing out of order at retry
#

--connection server_1
CREATE TABLE t1 (a int PRIMARY KEY, b INT) ENGINE=InnoDB;


# Replicate create-t1 and prepare to re-start slave in optimistic mode
--sync_slave_with_master server_2
--source include/stop_slave.inc
SET @old_parallel_threads=@@GLOBAL.slave_parallel_threads;
SET @@GLOBAL.slave_parallel_threads=5;
SET @old_parallel_mode=@@GLOBAL.slave_parallel_mode;
SET @@GLOBAL.slave_parallel_mode='aggressive';
SET @old_lock_wait_timeout=@@GLOBAL.innodb_lock_wait_timeout;
SET @@GLOBAL.innodb_lock_wait_timeout=2;
SET @old_slave_transaction_retries=@@GLOBAL.slave_transaction_retries;
SET @@GLOBAL.slave_transaction_retries=1;

--echo # Spoilers on the slave side causing temporary errors
--connect (spoiler_21,127.0.0.1,root,,test,$SLAVE_MYPORT)
BEGIN;
  INSERT INTO t1 SET a=1,b=2;

--connect (spoiler_22,127.0.0.1,root,,test,$SLAVE_MYPORT)
BEGIN;
  INSERT INTO t1 SET a=2,b=2;

--echo # Master payload
--connection server_1
SET @@SESSION.GTID_SEQ_NO=1000;
INSERT INTO t1 SET a=1,b=1;
SET @@SESSION.GTID_SEQ_NO=1001;
INSERT INTO t1 SET a=2,b=1;

--echo # Start slave whose both appliers is destined to being blocked
--connection server_2
SET @old_dbug= @@GLOBAL.debug_dbug;
SET @@GLOBAL.debug_dbug="+d,rpl_parallel_simulate_wait_at_retry";
--source include/start_slave.inc

--echo # Make sure both workers are waiting at their sync points
--let $wait_condition= SELECT count(*)=2 FROM information_schema.processlist WHERE state LIKE '%debug sync point%';
--source include/wait_condition.inc


--echo # Signal to the 1st to proceed after it has reached termination state
SET @@DEBUG_SYNC='now SIGNAL proceed_by_1000';
--connection spoiler_21
ROLLBACK;

--let $wait_condition= SELECT count(*)=1 FROM information_schema.processlist WHERE state LIKE '%debug sync point%';
--source include/wait_condition.inc

--echo # Release the 2nd worker to proceed
--connection spoiler_22
ROLLBACK;
--connection server_2
SET @@DEBUG_SYNC='now SIGNAL proceed_by_1001';

--echo # observe how it all ends
if (`SELECT count(*) = 1 FROM t1 WHERE a = 1`)
{
  --echo "*** Unexpected commit by the first Worker ***"
  SELECT * from t1;
  --die
}

--echo # Wait for the workers to go home and check the result of applying
--let $wait_condition=SELECT count(*) = 0 FROM information_schema.processlist WHERE command = 'Slave_worker'
--source include/wait_condition.inc
if (`SELECT count(*) = 1 FROM t1 WHERE a = 2`)
{
  --echo
  --echo "*** Error: congrats, you hit MDEV-12746 issue. ***"
  --echo
  --die
}
--echo # which is OK

#
# Clean up
#
--connection server_2
--let $rpl_only_running_threads= 1
--source include/stop_slave.inc
SET @@GLOBAL.slave_parallel_threads=@old_parallel_threads;
SET @@GLOBAL.slave_parallel_mode=@old_parallel_mode;
SET @@GLOBAL.innodb_lock_wait_timeout=@old_lock_wait_timeout;
SET @@GLOBAL.slave_transaction_retries=@old_slave_transaction_retries;
SET @@GLOBAL.debug_dbug=@old_dbug;
SET debug_sync='RESET';
--source include/start_slave.inc

--connection server_1
DROP TABLE t1;

--sync_slave_with_master server_2

--source include/rpl_end.inc