Hello dear list, I wish it had been a longer while before I had to
bother y'all again, but I am pulling my hairs out on this one.
<deepBreath>
Here it goes: using java mapscript rev 6168 from svn, whenever I try
to activate a specific layer, I get this:
msDrawMap(): Image handling error. Failed to draw layer named
'Layer_Tematica_RJ_145'.;: The map parent object is null.
Tomcat does not crash, so I think this could be a good sign.
Digging trough mapserver code I was unable to find this message and
look at its context to get a better idea of whats going on, so debuging
my code step by step I came up with the following facts:
1- the layer where it crashes is the 68th in the line. Previously
layers where drawn, both inline and non-inline ones.
2 - this layer is a clone from a layer that exists in the mapfile.
It is declared with:
layerObj layer =
map.getLayerByName(nameFromConstant).cloneLayer();
layer.setName("blahblahblah");
try{
valores = mapa.insertLayer(layerValores, -1);
}catch(Exception e){
throw new DGTKeyException("error.maxNumLayers",
e.getMessage());
}
3 - It only crashes when this layer is turned on. Map is shown with
this layer off when user first logs and it can be turned on from a tree
widget. If he does, boom.
4 - Just before calling map.draw(), both map.getLayerByName(name)
and map.getLayer(index) return the right layer. whem map.draw() is
called, boom.
5 - Suspecting of the clonage bits mixed with the changes to object
parenthood Umberto implemented, I modified make threadtests to clone a
bunch of layers, insert them into the map, juggle them around a bit like
happens in my app and then call map.draw() in the hopes of reproducing
the error. No go. The test works normally and no errors occur. :(
and finally 6 - reverting to mapserver 4.10.1 "fixes" it.
Any clues?
Thanks!
Rodrigo
--
*Rodrigo Del C. Andrade*
/Programador/
/SIC - SSE - Soluções Segurança Pública/
*DÍGITRO TECNOLOGIA*
*E-mail:* [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>
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*Fax:* +55 48 3281-7299
*Site:* www.digitro.com <http://www.digitro.com>
