hi there
we have a problem while downloading files from our website while spdy is enabled.

the download wont start and after a few seconds is runs to a timeoute.
if i disable spdy, the download is working.

what could that be.
The log files show me the following error

2015/06/10 09:26:14 [error] 2538#0: *6497287 upstream prematurely closed connection while reading upstream, client: x.x.x.x, server: www.x.com, request: "GET /xxx/report.do?action=ApprovedProductsCSV&xxxx&dateFrom=14.04.2015 HTTP/1.1", upstream: "http://xxxx:xxxx/xxx/report.do?action=ApprovedProductsCSV&xxx&dateFrom=14.04.2015", host: "www.xxx.com", referrer: "https://www.xxx.com/xxx/report.do?action=ApprovedProducts"