private void doTestMultipleGroupingXARollback() throws Exception {
    ServerLocator locator = createInVMNonHALocator();
    locator.setBlockOnAcknowledge(true);
    ClientSessionFactory sessionFactory = createSessionFactory(locator);
    ClientSession clientSession = sessionFactory.createSession(true, false, false);
    ClientProducer clientProducer = this.clientSession.createProducer(qName);
    clientSession.start();

    ClientConsumer consumer = clientSession.createConsumer(qName);
    ClientConsumer consumer2 = clientSession.createConsumer(qName);
    Xid xid = new XidImpl("bq".getBytes(), 4, "gtid".getBytes());
    clientSession.start(xid, XAResource.TMNOFLAGS);

    SimpleString groupId = new SimpleString("grp1");
    SimpleString groupId2 = new SimpleString("grp2");
    int numMessages = 100;
    for (int i = 0; i < numMessages; i++) {
      ClientMessage message = createTextMessage(clientSession, "m" + i);
      if (i % 2 == 0 || i == 0) {
        message.putStringProperty(Message.HDR_GROUP_ID, groupId);
      } else {
        message.putStringProperty(Message.HDR_GROUP_ID, groupId2);
      }
      clientProducer.send(message);
    }

    CountDownLatch latch = new CountDownLatch(numMessages);
    DummyMessageHandler dummyMessageHandler = new DummyMessageHandler(latch, true);
    consumer.setMessageHandler(dummyMessageHandler);
    DummyMessageHandler dummyMessageHandler2 = new DummyMessageHandler(latch, true);
    consumer2.setMessageHandler(dummyMessageHandler2);
    Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
    clientSession.end(xid, XAResource.TMSUCCESS);
    Assert.assertEquals(dummyMessageHandler.list.size(), 50);
    int i = 0;
    for (ClientMessage message : dummyMessageHandler.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    Assert.assertEquals(dummyMessageHandler2.list.size(), 50);
    i = 1;
    for (ClientMessage message : dummyMessageHandler2.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    latch = new CountDownLatch(numMessages);
    dummyMessageHandler.reset(latch);
    dummyMessageHandler2.reset(latch);
    clientSession.rollback(xid);
    clientSession.start(xid, XAResource.TMNOFLAGS);
    Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
    clientSession.end(xid, XAResource.TMSUCCESS);
    clientSession.prepare(xid);
    clientSession.commit(xid, false);
    Assert.assertEquals(dummyMessageHandler.list.size(), 50);
    i = 0;
    for (ClientMessage message : dummyMessageHandler.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    Assert.assertEquals(dummyMessageHandler2.list.size(), 50);
    i = 1;
    for (ClientMessage message : dummyMessageHandler2.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    consumer = this.clientSession.createConsumer(qName);
    Assert.assertNull(consumer.receiveImmediate());
    clientSession.close();
    locator.close();
  }
  private void doTestMultipleGroupingTXRollback() throws Exception {
    log.info("*** starting test");
    ServerLocator locator = createInVMNonHALocator();
    locator.setBlockOnAcknowledge(true);
    ClientSessionFactory sessionFactory = createSessionFactory(locator);
    ClientSession clientSession = sessionFactory.createSession(false, false, false);
    ClientProducer clientProducer = this.clientSession.createProducer(qName);
    ClientConsumer consumer = clientSession.createConsumer(qName);
    ClientConsumer consumer2 = clientSession.createConsumer(qName);
    clientSession.start();

    // need to wait a bit or consumers might be busy
    Thread.sleep(200);

    SimpleString groupId = new SimpleString("grp1");
    SimpleString groupId2 = new SimpleString("grp2");
    int numMessages = 100;
    for (int i = 0; i < numMessages; i++) {
      ClientMessage message = createTextMessage(clientSession, "m" + i);
      if (i % 2 == 0 || i == 0) {
        message.putStringProperty(Message.HDR_GROUP_ID, groupId);
      } else {
        message.putStringProperty(Message.HDR_GROUP_ID, groupId2);
      }
      clientProducer.send(message);
    }

    CountDownLatch latch = new CountDownLatch(numMessages);
    DummyMessageHandler dummyMessageHandler = new DummyMessageHandler(latch, true);
    consumer.setMessageHandler(dummyMessageHandler);
    DummyMessageHandler dummyMessageHandler2 = new DummyMessageHandler(latch, true);
    consumer2.setMessageHandler(dummyMessageHandler2);
    Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
    Assert.assertEquals(50, dummyMessageHandler.list.size(), dummyMessageHandler.list.size());
    int i = 0;
    for (ClientMessage message : dummyMessageHandler.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    Assert.assertEquals(dummyMessageHandler2.list.size(), 50);
    i = 1;
    for (ClientMessage message : dummyMessageHandler2.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    latch = new CountDownLatch(numMessages);
    dummyMessageHandler.reset(latch);
    dummyMessageHandler2.reset(latch);
    clientSession.rollback();
    Assert.assertTrue(latch.await(10, TimeUnit.SECONDS));
    Assert.assertEquals(dummyMessageHandler.list.size(), 50);
    i = 0;
    for (ClientMessage message : dummyMessageHandler.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    Assert.assertEquals(dummyMessageHandler2.list.size(), 50);
    i = 1;
    for (ClientMessage message : dummyMessageHandler2.list) {
      Assert.assertEquals(message.getBodyBuffer().readString(), "m" + i);
      i += 2;
    }
    consumer = this.clientSession.createConsumer(qName);
    Assert.assertNull(consumer.receiveImmediate());
    clientSession.close();
    locator.close();
  }