Galera MTR Tests: fortify galera_parallel_simple.test against sporadic failures

mysql-test/suite/galera/r/galera_parallel_simple.result

 CREATE TABLE t1 (id INT) ENGINE=InnoDB;
 CREATE TABLE t2 (id INT) ENGINE=InnoDB;
 SET GLOBAL wsrep_slave_threads = 2;
+LOCK TABLE t1 WRITE;
 INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);
 INSERT INTO t1 VALUES (1);
@@ -13,15 +14,15 @@ INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);
 INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);
+SET SESSION wsrep_sync_wait = 0;
+UNLOCK TABLES;
+SET SESSION wsrep_sync_wait = 7;
 SELECT COUNT(*) = 10 FROM t1;
 COUNT(*) = 10
 0
 SELECT COUNT(*) = 10 FROM t2;
 COUNT(*) = 10
 0
-SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE 'committed%';
-COUNT(*) = 2
-1
 SET GLOBAL wsrep_slave_threads = 1;;
 DROP TABLE t1;
 DROP TABLE t2;

mysql-test/suite/galera/t/galera_parallel_simple.test

@@ -13,6 +13,7 @@ CREATE TABLE t2 (id INT) ENGINE=InnoDB;
 
 --connection node_2
 SET GLOBAL wsrep_slave_threads = 2;
+LOCK TABLE t1 WRITE;
 
 --connection node_1
 INSERT INTO t1 VALUES (1);
@@ -34,10 +35,20 @@ INSERT INTO t1 VALUES (1);
 INSERT INTO t2 VALUES (1);
 
 --connection node_2
+SET SESSION wsrep_sync_wait = 0;
+
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE 'Waiting for table metadata lock%';
+--source include/wait_condition.inc
+
+--let $wait_condition = SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE 'applied write set%';
+--source include/wait_condition.inc
+
+UNLOCK TABLES;
+
+SET SESSION wsrep_sync_wait = 7;
 
 SELECT COUNT(*) = 10 FROM t1;
 SELECT COUNT(*) = 10 FROM t2;
-SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE STATE LIKE 'committed%';
 
 --eval SET GLOBAL wsrep_slave_threads = $wsrep_slave_threads_orig;