[mapserver-users] RE: Character Limit for NAME and GROUP

tellett thomas.ellett at statkart.no
Thu Jan 27 02:35:46 PST 2011


Hi Steve,

I'm now not sure what the problem is, but it seems to be triggered by
character length in the NAME attribute. We think its triggering some kind of
memory problem. Sorry about the vagueness but its really difficult to narrow
it down. The problem just seems to affect the xml returned by the
GetCapabilities call, Testing with shp2img we can still get a valid image
even when the capabilities doc breaks. 

With 1 service, the memory problem occurred when the char length of NAME was
over 81. The strange thing was that if I tried to name another layer in the
same service with a name 81 characters long the service broke again, but
worked if I reduced this to 80 characters. Then same again for another
layer, I had to reduce the name length to 79. However this was not the case
for a different service where the character lengths needed to break the
service (return an invalid xml doc) were completely different. So because
its not reproduceable I haven't included a mapfile with test data. I do
include a txt file with some of the apache error log though (we get nothing
from the mapserver error log). Also calls using 1.3.0 and 1.1.1 both return
invalid docs.

We're going to try 5.6.6 to see if that makes a difference. If we make a
breakthrough or manage to make this reproduceable I'll let you know. Sorry I
couldn't give more , or more precise info. You may be able to reproduce it
with one of your own services, just make one of the layer names very long!

Best Regards

Tom

http://osgeo-org.1803224.n2.nabble.com/file/n5965802/stacktraces.mapserver.zip
stacktraces.mapserver.zip  
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