saving Operations accidentally deletes geometry data

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From time to times, the geographical coordinates of some features of my program get deleted on any update - without an obvious cause.

The layer uses WFS 1.1.0 as protocol. The saving Operations looks approximately like this

feature.attributes.Abteilung = "02"; feature.state = OpenLayers.State.UPDATE; features = [feature]; saveStrategy.save(features); In the log, it looks like this:

INFO | jvm 1 | 2015/06/17 09:21:11 | Request: transaction INFO | jvm 1 | 2015/06/17 09:21:11 | service = WFS INFO | jvm 1 | 2015/06/17 09:21:11 | version = 1.1.0 INFO | jvm 1 | 2015/06/17 09:21:11 | baseUrl = http://localhost:8080/geoserver/ INFO | jvm 1 | 2015/06/17 09:21:11 | group[0] = wfs:update=net.opengis.wfs.impl.UpdateElementTypeImpl@e6f68e (filter: [ Graeber.1068 ], handle: null, inputFormat: , srsName: null, typeName: {Ahaus_neu}Graeber) INFO | jvm 1 | 2015/06/17 09:21:11 | update[0]: INFO | jvm 1 | 2015/06/17 09:21:11 | property[0]: INFO | jvm 1 | 2015/06/17 09:21:11 | name = GEOMETRYproperty[0]: INFO | jvm 1 | 2015/06/17 09:21:11 | name = ABTEILUNG INFO | jvm 1 | 2015/06/17 09:21:11 | value = 02property[0]: which I understand as: the property GEOMETRY is not set to any value.

What I want now, is either:

To detect the cause (it happens only very seldom)

or

To prevent any update that sets GEOMETRY to NULL

or:

To make the SaveStrategy ignore the geometry and to only update the attributes

is one of these possible and how?



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