Nginx upstream closed when spdy is active

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

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,259482,259482#msg-259482

On Wednesday 10 June 2015 04:00:40 cobain86 wrote:

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

[…]

You should check your backend logs to find the reason why it closed the
connection.

wbr, Valentin V. Bartenev

we have found the problem
our backend system is sending the wrong content-lenght header
information.

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,259482,259521#msg-259521

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