MW-86 MTR test: check that SHOW commands no longer obey wsrep_sync_wait = 1

mysql-test/suite/galera/r/MW-86.result

+SET SESSION wsrep_sync_wait = 1;
+SET GLOBAL DEBUG = "d,sync.wsrep_apply_cb";
+CREATE DATABASE db1;
+SHOW CREATE DATABASE db1;
+ERROR 42000: Unknown database 'db1'
+SET GLOBAL DEBUG = "";
+SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
+SET SESSION wsrep_sync_wait = 8;
+DROP DATABASE db1;
+SET SESSION wsrep_sync_wait = 8;
+SET GLOBAL DEBUG = "d,sync.wsrep_apply_cb";
+SET GLOBAL wsrep_provider_options = "repl.causal_read_timeout=PT0.1S";
+CREATE DATABASE db1;
+SHOW CREATE DATABASE db1;
+ERROR HY000: Lock wait timeout exceeded; try restarting transaction
+SET GLOBAL DEBUG = "";
+SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
+DROP DATABASE db1;

mysql-test/suite/galera/t/MW-86.test

+--source include/galera_cluster.inc
+
+#
+# Test 1: SHOW commands no longer obey wsrep_sync_wait = 1
+#
+
+--connection node_2
+SET SESSION wsrep_sync_wait = 1;
+SET GLOBAL DEBUG = "d,sync.wsrep_apply_cb";
+
+--connection node_1
+CREATE DATABASE db1;
+
+--connection node_2
+--error ER_BAD_DB_ERROR
+SHOW CREATE DATABASE db1;
+SET GLOBAL DEBUG = "";
+SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
+
+SET SESSION wsrep_sync_wait = 8;
+DROP DATABASE db1;
+
+
+#
+# Test 2: SHOW commands now obey wsrep_sync_wait = 8
+#
+
+--connection node_2
+--let $wsrep_provider_options_orig = `SELECT @@wsrep_provider_options`
+SET SESSION wsrep_sync_wait = 8;
+SET GLOBAL DEBUG = "d,sync.wsrep_apply_cb";
+SET GLOBAL wsrep_provider_options = "repl.causal_read_timeout=PT0.1S";
+
+--connection node_1
+CREATE DATABASE db1;
+
+--connection node_2
+--error ER_LOCK_WAIT_TIMEOUT
+SHOW CREATE DATABASE db1;
+
+SET GLOBAL DEBUG = "";
+SET DEBUG_SYNC = "now SIGNAL signal.wsrep_apply_cb";
+DROP DATABASE db1;
+
+--disable_query_log
+--eval SET GLOBAL wsrep_provider_options = "$wsrep_provider_options_orig"