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#
# This test tests the operation of transaction replay. If a potentially
# conflicting remote transaction arrives at just the right time during
# the commit of a local transaction, the local transaction will be aborted
# and replayed.
#
# Because the write set with higher sequence number cannot BF abort
# the victim with lower sequence number, the conflicting remote transaction
# must be executed first and must be allowed to proceed up to the apply
# monitor before sending the COMMIT for the transaction to be replayed.
#
--source include/galera_cluster.inc
--source include/have_innodb.inc
--source include/have_debug_sync.inc
--source include/galera_have_debug_sync.inc
######################################################################
#
# Scenario #1, the victim will have higher seqno and will be replayed
#
######################################################################
--let $wsrep_local_replays_old = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 CHAR(1));
INSERT INTO t1 VALUES (1, 'a');
INSERT INTO t1 VALUES (2, 'a');
--connection node_1
SET AUTOCOMMIT=ON;
START TRANSACTION;
UPDATE t1 SET f2 = 'b' WHERE f1 = 1;
SELECT * FROM t1 WHERE f1 = 2 FOR UPDATE;
# Block the applier on node #1 and issue a conflicting update on node #2
--connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1
SET SESSION wsrep_sync_wait=0;
--let $galera_sync_point = apply_monitor_slave_enter_sync
--source include/galera_set_sync_point.inc
--connection node_2
UPDATE t1 SET f2 = 'c' WHERE f1 = 2;
--connection node_1a
--source include/galera_wait_sync_point.inc
--source include/galera_clear_sync_point.inc
# Block the commit, send the COMMIT and wait until it gets blocked
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_set_sync_point.inc
--connection node_1
--send COMMIT
--connection node_1a
--let $galera_sync_point = apply_monitor_slave_enter_sync commit_monitor_master_enter_sync
--source include/galera_wait_sync_point.inc
--source include/galera_clear_sync_point.inc
# Let the conflicting UPDATE proceed and wait until it hits abort_trx_end.
# The victim transaction still sits in commit_monitor_master_sync_point.
--let $galera_sync_point = abort_trx_end
--source include/galera_set_sync_point.inc
--let $galera_sync_point = apply_monitor_slave_enter_sync
--source include/galera_signal_sync_point.inc
--let $galera_sync_point = abort_trx_end commit_monitor_master_enter_sync
--source include/galera_wait_sync_point.inc
# Let the transactions proceed
--source include/galera_clear_sync_point.inc
--let $galera_sync_point = abort_trx_end
--source include/galera_signal_sync_point.inc
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_signal_sync_point.inc
# Commit succeeds
--connection node_1
--reap
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'b';
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'c';
# wsrep_local_replays has increased by 1
--let $wsrep_local_replays_new = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
--disable_query_log
--eval SELECT $wsrep_local_replays_new - $wsrep_local_replays_old = 1 AS wsrep_local_replays;
--enable_query_log
--connection node_2
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'b';
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'c';
DROP TABLE t1;
#########################################################################
#
# Scenario #2, the victim will have lower seqno and will not be replayed
#
#########################################################################
--connection node_1
--let $wsrep_local_replays_old = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 CHAR(1));
INSERT INTO t1 VALUES (1, 'a');
INSERT INTO t1 VALUES (2, 'a');
--connection node_1
SET AUTOCOMMIT=ON;
START TRANSACTION;
UPDATE t1 SET f2 = 'b' WHERE f1 = 1;
SELECT * FROM t1 WHERE f1 = 2 FOR UPDATE;
# Block the commit, send the COMMIT and wait until it gets blocked
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_set_sync_point.inc
--connection node_1
--send COMMIT
--connection node_1a
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_wait_sync_point.inc
--source include/galera_clear_sync_point.inc
# Set sync point at the end of BF abort, issue a conflicting update
# and wait for the conflicting update to hit the sync point.
--let $galera_sync_point = abort_trx_end
--source include/galera_set_sync_point.inc
--connection node_2
UPDATE t1 SET f2 = 'c' WHERE f1 = 2;
--connection node_1a
--let $galera_sync_point = abort_trx_end commit_monitor_master_enter_sync
--source include/galera_wait_sync_point.inc
--source include/galera_clear_sync_point.inc
# Let the transactions proceed
--source include/galera_clear_sync_point.inc
--let $galera_sync_point = abort_trx_end
--source include/galera_signal_sync_point.inc
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_signal_sync_point.inc
# Commit succeeds
--connection node_1
--reap
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'b';
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'c';
# wsrep_local_replays should have not increased
--let $wsrep_local_replays_new = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
--disable_query_log
--eval SELECT $wsrep_local_replays_new - $wsrep_local_replays_old = 0 AS wsrep_local_replays;
--enable_query_log
--connection node_2
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'b';
SELECT COUNT(*) = 1 FROM t1 WHERE f2 = 'c';
DROP TABLE t1;
########################################
#
# test replaying of prepared statements
#
########################################
--connection node_1
--let $wsrep_local_replays_old = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
CREATE TABLE t1 (i int primary key, j int) ENGINE=INNODB;
INSERT INTO t1 VALUES (1, 0), (3, 0);
SELECT * FROM t1;
SET AUTOCOMMIT=ON;
PREPARE stmt1 FROM "UPDATE t1 SET j = 1 where i > 0";
# Block the applier on node #1 and issue a conflicting update on node #2
--connection node_1a
SET SESSION wsrep_sync_wait=0;
--let $galera_sync_point = apply_monitor_slave_enter_sync
--source include/galera_set_sync_point.inc
--connection node_2
INSERT INTO t1 VALUES(2,2);
--connection node_1a
--source include/galera_wait_sync_point.inc
--source include/galera_clear_sync_point.inc
# Block the commit, send the EXECUTE stmt1 and wait until it gets blocked
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_set_sync_point.inc
--connection node_1
SET SESSION wsrep_sync_wait=0;
--send EXECUTE stmt1
--connection node_1a
--let $galera_sync_point = apply_monitor_slave_enter_sync commit_monitor_master_enter_sync
--source include/galera_wait_sync_point.inc
--source include/galera_clear_sync_point.inc
# Let the conflicting INSERT proceed and wait until it hits abort_trx_end.
# The victim transaction still sits in commit_monitor_master_sync_point.
--let $galera_sync_point = abort_trx_end
--source include/galera_set_sync_point.inc
--let $galera_sync_point = apply_monitor_slave_enter_sync
--source include/galera_signal_sync_point.inc
--let $galera_sync_point = abort_trx_end commit_monitor_master_enter_sync
--source include/galera_wait_sync_point.inc
# Let the transactions proceed
--source include/galera_clear_sync_point.inc
--let $galera_sync_point = abort_trx_end
--source include/galera_signal_sync_point.inc
--let $galera_sync_point = commit_monitor_master_enter_sync
--source include/galera_signal_sync_point.inc
# Commit succeeds
--connection node_1
--reap
SET SESSION wsrep_sync_wait=7;
SELECT * FROM t1;
--connection node_2
SELECT * FROM t1;
--connection node_1
# wsrep_local_replays has increased by 1
--let $wsrep_local_replays_new = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
--disable_query_log
--eval SELECT $wsrep_local_replays_new - $wsrep_local_replays_old = 1 AS wsrep_local_replays;
--enable_query_log
DEALLOCATE PREPARE stmt1;
DROP TABLE t1;
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