MXS-1457: Add test case

Added a test that reproduces the problem.

maxscale-system-test/CMakeLists.txt

@@ -498,6 +498,10 @@ add_test_executable(mxs1295_sp_call.cpp mxs1295_sp_call mxs1295 LABELS maxscale
 # https://jira.mariadb.org/browse/MXS-1451
 add_test_executable(mxs1451_skip_auth.cpp mxs1451_skip_auth mxs1451_skip_auth LABELS maxscale REPL_BACKEND)
 
+# MXS-1457: Deleted servers are not ignored when users are loaded
+# https://jira.mariadb.org/browse/MXS-1457
+add_test_executable(mxs1457_ignore_deleted.cpp mxs1457_ignore_deleted mxs1457_ignore_deleted LABELS REPL_BACKEND)
+
 # 'namedserverfilter' test
 add_test_executable(namedserverfilter.cpp namedserverfilter namedserverfilter LABELS namedserverfilter LIGHT REPL_BACKEND)
 

maxscale-system-test/cnf/maxscale.cnf.template.mxs1457_ignore_deleted

@@ -0,0 +1,60 @@
+[maxscale]
+threads=###threads###
+log_info=1
+
+[MySQL Monitor]
+type=monitor
+module=mysqlmon
+###repl51###
+servers=server1,server2,server3,server4
+user=maxskysql
+passwd=skysql
+monitor_interval=1000
+
+[RW Split Router]
+type=service
+router=readwritesplit
+servers=server1,server2,server3,server4
+user=maxskysql
+passwd=skysql
+router_options=master_failure_mode=error_on_write
+
+[RW Split Listener]
+type=listener
+service=RW Split Router
+protocol=MySQLClient
+port=4006
+
+[CLI]
+type=service
+router=cli
+
+[CLI Listener]
+type=listener
+service=CLI
+protocol=maxscaled
+socket=default
+
+[server1]
+type=server
+address=###node_server_IP_1###
+port=###node_server_port_1###
+protocol=MySQLBackend
+
+[server2]
+type=server
+address=###node_server_IP_2###
+port=###node_server_port_2###
+protocol=MySQLBackend
+
+[server3]
+type=server
+address=###node_server_IP_3###
+port=###node_server_port_3###
+protocol=MySQLBackend
+
+[server4]
+type=server
+address=###node_server_IP_4###
+port=###node_server_port_4###
+protocol=MySQLBackend

maxscale-system-test/mxs1457_ignore_deleted.cpp

@@ -0,0 +1,46 @@
+/**
+ * MXS-1457: Deleted servers are not ignored when users are loaded
+ *
+ * Check that a corrupt and deleted server is not used to load users
+ */
+
+#include "testconnections.h"
+
+int main(int argc, char *argv[])
+{
+    TestConnections test(argc, argv);
+
+    test.set_timeout(60);
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "CREATE USER 'auth_test'@'%%' IDENTIFIED BY 'test'");
+    execute_query(test.repl->nodes[0], "GRANT ALL ON *.* to 'auth_test'@'%%'");
+    test.repl->sync_slaves();
+    test.repl->close_connections();
+
+    // Stop slaves and drop the user on the master
+    test.repl->stop_slaves();
+    test.repl->connect();
+    execute_query(test.repl->nodes[0], "DROP USER 'auth_test'@'%%'");
+    test.repl->close_connections();
+
+    test.set_timeout(60);
+    MYSQL* conn = open_conn_db(test.rwsplit_port, test.maxscale_ip(), "test", "auth_test", "test", false);
+    test.add_result(mysql_errno(conn) == 0, "Connection with users from master should fail");
+    mysql_close(conn);
+
+    test.ssh_maxscale(true, "maxadmin remove server server1 \"RW Split Router\"");
+    conn = open_conn_db(test.rwsplit_port, test.maxscale_ip(), "test", "auth_test", "test", false);
+    test.add_result(mysql_errno(conn), "Connection should be OK: %s", mysql_error(conn));
+    test.try_query(conn, "SELECT 1");
+    mysql_close(conn);
+
+    test.set_timeout(60);
+    test.repl->connect();
+    execute_query(test.repl->nodes[1], "START SLAVE");
+    execute_query(test.repl->nodes[2], "START SLAVE");
+    execute_query(test.repl->nodes[3], "START SLAVE");
+    test.repl->sync_slaves();
+    test.repl->close_connections();
+
+    return test.global_result;
+}