Question for download component

Hi all !
I’m having one issue while using download component in vaadin.
I’m have some client connect to my application via proxy.But when one client download one resource from server then another client receive this resource.

Please suggest me!
Thanks all.

This doe snot make sense, unless both resources use the same URL and the proxy is caching the content…

Are both components using the same URI ?
Are you using the same instance of the object ?