lp:1372840 - test case

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

@@ -104,3 +104,11 @@ COUNT(*) = 1
 SET GLOBAL wsrep_slave_threads = 1;
 DROP TABLE t1;
 DROP TABLE t2;
+#
+# lp:1372840 - Changing wsrep_slave_threads causes future connections to hang
+#
+CREATE TABLE t1 (i INT AUTO_INCREMENT PRIMARY KEY) ENGINE=INNODB;
+SET GLOBAL wsrep_slave_threads = 4;
+SET GLOBAL wsrep_slave_threads = 1;
+DROP TABLE t1;
+# End of tests

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

@@ -68,3 +68,17 @@ SELECT COUNT(*) = 1 FROM INFORMATION_SCHEMA.PROCESSLIST WHERE USER = 'system use
 
 DROP TABLE t1;
 DROP TABLE t2;
+
+--echo #
+--echo # lp:1372840 - Changing wsrep_slave_threads causes future connections to hang
+--echo #
+
+--connection node_1
+CREATE TABLE t1 (i INT AUTO_INCREMENT PRIMARY KEY) ENGINE=INNODB;
+
+--connection node_2
+SET GLOBAL wsrep_slave_threads = 4;
+SET GLOBAL wsrep_slave_threads = 1;
+DROP TABLE t1;
+
+--echo # End of tests