assertNotNull("Consumer 2 should have received a third message", received);
assertEquals("Unexpected group", "ONE", received.getStringProperty("group"));
assertEquals("incorrect message received", 2, received.getIntProperty("msg"));
cs2.commit();
received = consumer2.receive(1000);
assertNotNull("Consumer 2 should have received a fourth message", received);
assertEquals("Unexpected group", "ONE", received.getStringProperty("group"));