https://build.spring.io/browse/INTSAMPLES-NIGHTLY-2256 The `AggregatorDemoTest` fails sporadically with no second part from reply. That might be as a result of the cached consumers in the `CachingConnectionFactory`, so several `<int-jms:inbound-gateway>` for the topic using the same connectionFactory essentially end up using the same consumer sequentially. And Broker considers them as a single consumer, therefore only one message is sent.