Merge branch '2.3' into 2.4

system-test/auth_fail_crash.cpp

@@ -0,0 +1,48 @@
+/**
+ * @file bug572.cpp  regression case for bug 572 ( " If reading a user from users table fails, MaxScale fails"
+ *)
+ *
+ * - try GRANT with wrong IP using all Maxscale services:
+ *  + GRANT ALL PRIVILEGES ON *.* TO  'foo'@'*.foo.notexists' IDENTIFIED BY 'foo';
+ *  + GRANT ALL PRIVILEGES ON *.* TO  'bar'@'127.0.0.*' IDENTIFIED BY 'bar'
+ *  + DROP USER 'foo'@'*.foo.notexists'
+ *  + DROP USER 'bar'@'127.0.0.*'
+ * - do "select * from mysql.user" using RWSplit to check if Maxsclae crashed
+ */
+
+
+#include <iostream>
+#include <unistd.h>
+#include <maxtest/testconnections.hh>
+
+using namespace std;
+
+void create_drop_bad_user(MYSQL* conn, TestConnections* Test)
+{
+
+    Test->try_query(conn,
+                    (char*)
+                    "GRANT ALL PRIVILEGES ON *.* TO  'foo'@'*.foo.notexists' IDENTIFIED BY 'foo';");
+    Test->try_query(conn, (char*) "GRANT ALL PRIVILEGES ON *.* TO  'bar'@'127.0.0.*' IDENTIFIED BY 'bar'");
+    Test->try_query(conn, (char*) "DROP USER 'foo'@'*.foo.notexists'");
+    Test->try_query(conn, (char*) "DROP USER 'bar'@'127.0.0.*'");
+}
+
+int main(int argc, char* argv[])
+{
+    TestConnections* Test = new TestConnections(argc, argv);
+    Test->set_timeout(10);
+
+    Test->repl->connect();
+    Test->maxscales->connect_maxscale(0);
+
+    Test->tprintf("Trying GRANT for with bad IP: RWSplit\n");
+    create_drop_bad_user(Test->maxscales->conn_rwsplit[0], Test);
+
+    Test->tprintf("Trying SELECT to check if Maxscale hangs\n");
+    Test->try_query(Test->maxscales->conn_rwsplit[0], (char*) "select * from mysql.user");
+
+    int rval = Test->global_result;
+    delete Test;
+    return rval;
+}