Memory leak while using eip component (wiretab, static recipient)

I am using a eip-component (tested both static recipient and wiretab) and received a memory leak while processing messages. There is a simple testcase for this, when receiving a file and send it via eip to more then one file sender there is a remaining amount of heap which is not cleared by gc (even when I trigger the gc by hand).

Related threads:
http://www.nabble.com/Best-practices%2C-working-with-beans-and-huge-messages.-tt19914439ef12049.html
http://www.nabble.com/Memory-issue-in-servicemix-tt19727632ef12049.html