Galera MTR Tests: Test case for MW-292 : NOW() returns stale timestamp after transaction replay

2 files changed, 109 insertions, 0 deletions

diff --git a/mysql-test/suite/galera/r/MW-292.result b/mysql-test/suite/galera/r/MW-292.result
new file mode 100644
index 00000000000..f038f880efa
--- /dev/null
+++ b/mysql-test/suite/galera/r/MW-292.result
@@ -0,0 +1,30 @@
+CREATE TABLE rand_table (f1 FLOAT);
+CREATE TABLE t1 (f1 INTEGER PRIMARY KEY, f2 CHAR(1));
+INSERT INTO t1 VALUES (1, 'a');
+INSERT INTO t1 VALUES (2, 'a');
+SET AUTOCOMMIT=ON;
+START TRANSACTION;
+UPDATE t1 SET f2 = 'b' WHERE f1 = 1;
+SELECT * FROM t1 WHERE f1 = 2 FOR UPDATE;
+f1	f2
+2	a
+SET GLOBAL wsrep_provider_options = 'dbug=d,commit_monitor_enter_sync';
+COMMIT;;
+SET SESSION wsrep_sync_wait = 0;
+SET SESSION wsrep_on = 0;
+SET SESSION wsrep_on = 1;
+UPDATE t1 SET f2 = 'c' WHERE f1 = 2;
+SET GLOBAL wsrep_provider_options = 'dbug=';
+SET GLOBAL wsrep_provider_options = 'signal=commit_monitor_enter_sync';
+SELECT TIMEDIFF(SYSDATE(), NOW()) < 2;
+TIMEDIFF(SYSDATE(), NOW()) < 2
+1
+INSERT INTO rand_table VALUES (RAND()),(RAND()),(RAND()),(RAND()),(RAND());
+INSERT INTO rand_table VALUES (RAND()),(RAND()),(RAND()),(RAND()),(RAND());
+SELECT COUNT(DISTINCT f1) = 10 FROM rand_table;
+COUNT(DISTINCT f1) = 10
+1
+wsrep_local_replays
+1
+DROP TABLE t1;
+DROP TABLE rand_table;
diff --git a/mysql-test/suite/galera/t/MW-292.test b/mysql-test/suite/galera/t/MW-292.test
new file mode 100644
index 00000000000..945d9f42458
--- /dev/null
+++ b/mysql-test/suite/galera/t/MW-292.test
@@ -0,0 +1,79 @@
+#
+# MW-292 Reset timestamp after transaction replay
+#
+# We force transaction replay to happen and then we check that NOW() is not stuck in time.
+# As a bonus we also check that RAND() continues to return random values after replay
+#
+#
+
+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+--source include/have_debug_sync.inc
+--source suite/galera/include/galera_have_debug_sync.inc
+
+--let $wsrep_local_replays_old = `SELECT VARIABLE_VALUE FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_local_replays'`
+
+CREATE TABLE rand_table (f1 FLOAT);
+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
+--connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1
+--let $galera_sync_point = commit_monitor_enter_sync
+--source include/galera_set_sync_point.inc
+
+--connection node_1
+--send COMMIT;
+
+# Wait until commit is blocked
+--connection node_1a
+SET SESSION wsrep_sync_wait = 0;
+--source include/galera_wait_sync_point.inc
+
+# Issue a conflicting update on node #2
+--connection node_2
+UPDATE t1 SET f2 = 'c' WHERE f1 = 2;
+
+# Wait for both transactions to be blocked
+--connection node_1a
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'System lock';
+--source include/wait_condition.inc
+
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE = 'init' AND INFO = 'COMMIT';
+--source include/wait_condition.inc
+
+# Unblock the commit
+--connection node_1a
+--source include/galera_clear_sync_point.inc
+--source include/galera_signal_sync_point.inc
+
+# Commit succeeds via replay
+--connection node_1
+--reap
+
+# Confirm that NOW() is not stuck in time relative to SYSDATE();
+--sleep 3
+SELECT TIMEDIFF(SYSDATE(), NOW()) < 2;
+
+INSERT INTO rand_table VALUES (RAND()),(RAND()),(RAND()),(RAND()),(RAND());
+INSERT INTO rand_table VALUES (RAND()),(RAND()),(RAND()),(RAND()),(RAND());
+
+SELECT COUNT(DISTINCT f1) = 10 FROM rand_table;
+
+# 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
+DROP TABLE t1;
+DROP TABLE rand_table;