[Qgis-user] WFS-T update to geoserver fails

[emmexx]

I load a wfs-t layer hosted on a geoserver server and add or modify a 
feature.
When I save the layer, qgis timeouts, the layer is not updated on the 
server and I have to restart geoserver in order to be able to load it 
again in qgis (and elesewhere too).
The qgis error is:

Could not commit changes to layer xxx
Errors: ERROR: 1(s) feature not added

Provider errors:
   Empty response

I found something similar described here:
[[http://gis.stackexchange.com/questions/115471/qgis-wfs-error-could-not-commit-changes-to-layer]]
[[http://jira.codehaus.org/browse/GEOS-6059]]

Trying to understand what was wrong in the qgis call (update of a 
feature or new feature added) I used netTool. This program has a tunnel 
feature that acts as a MITM between an application and a remote server.
So I changed the wfs address in qgis from:

http://mywebsite:8080/geoserver/wfs to
http://localhost:7000/geoserver/wfs and set netTool to tunnel to
http://mywebsite:8080

I updated a feature value, saved and to my great surprise everything
worked fine.

After filing a bug in qgis I was suggested to try to connect to another 
geoserver. I started osgeo live 8 on another pc on my local network, 
from my desktop I started qgis, added a WFS layer from geoserver on 
osgeo live 8, updated a feature and everything worked fine.

So I'm asking here for help.

I asked for help on the geoserver mailing list but since I'm using the 
boundless opengeo versione, they can't help.

I just want to understand if this is a geoserver only problem or if it 
derives from the interaction of qgis and geoserver.

Why does netTool makes everything work fine?
Why can a call from qgis hang geoserver (the wfs service of...)?

Any help would be appreciated.

	maxx

QGIS version    2.6.1-Brighton    QGIS code revision    exported
Compiled against Qt    4.8.5    Running against Qt    4.8.5
Compiled against GDAL/OGR    1.11.0    Running against GDAL/OGR    1.11.0
Compiled against GEOS    3.3.8-CAPI-1.7.8    Running against GEOS 
3.3.8-CAPI-1.7.8
PostgreSQL Client Version    No support.    SpatiaLite Version    4.0.0
QWT Version    5.1.1    PROJ.4 Version    480
QScintilla2 Version    2.6.1

Geoserver is version 2.5 snapshot installed from boundless opengeo suite 4.1