ModelNode write = new ModelNode();
write.get(OP).set(WRITE_ATTRIBUTE_OPERATION);
write.get(OP_ADDR).add(HOST, "master").add(SERVER_CONFIG, "main-one");
write.get(NAME).set("socket-binding-port-offset");
write.get(VALUE).set(original + 1);
ModelNode response = masterClient.execute(write);
validateResponse(response);
final String mainServerGroup = "main-server-group";
Assert.assertEquals(SUCCESS, response.get(SERVER_GROUPS, mainServerGroup, "main-one", RESPONSE, OUTCOME).asString());
ModelNode headers = response.get(SERVER_GROUPS, mainServerGroup, "main-one", RESPONSE, RESPONSE_HEADERS);