Please browse through the samples (https://github.com/SpringSource/spri...ration-samples) and read the documentation http://static.springsource.org/sprin...eference/html/

When using a QueueChannel

Code:
	<int:channel id="ftpChannel">
		<int:queue capacity="1000"/>
	</int:channel>
The endpoint receiving messages from it needs a <poller/> child element.

But, you can simply remove the <queue/> element, and all will be well.