[mapserver-users] [BUG] MapServer 5.4.2 going into an endless loop!

[Steve Lime]

Does 5.6 exhibit the problem? Does a straight CGI call (mode=map)
exhibit
the problem? -Steve

>>> paalkr <pal.kristensen at statkart.no> 11/20/09 11:37 AM >>>

Hi!

I have discovered a situation where MapServer seems to enter an endless
loop
and uses all the CPU power available on a server. I have managed to
track
down the specific feature in our postgis database that causes MapServer
to
hang. A database dump containing only this feature and a working mapfile
are
attached.

The really strange thing is that this feature does not always fail to
draw,
the situation does only occur with some specific BBOX's in a WMS GetMap
request. A working and a non working request are posted below. The only
difference between the requests is that the bbox in the working one is
extended with 1000 meters to the east.

I have tested this on MapServer 5.4.2 on Linux and Windows, with the
same
result. I also tried it on an old MapServer 5.0.0 (windows) that still
lays
around, and the error was NOT present on 5.0.0, where both the requests
below did work.

NOT WORKING (>5.0.0)
http://localhost/cgi-bin/topo2?LAYERS=topo2_WMS&FORMAT=image%2Fjpeg&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A32632&BBOX=513024,6792928,599680,6879584&WIDTH=256&HEIGHT=256

WORKING:
http://localhost/cgi-bin/topo2?LAYERS=topo2_WMS&FORMAT=image%2Fjpeg&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A32632&BBOX=513024,6792928,600680,6879584&WIDTH=256&HEIGHT=256

Same information are provided in ticket 
http://trac.osgeo.org/mapserver/ticket/3207 #3207 

Mapfile: http://n2.nabble.com/file/n4037146/topo2.zip
db_dump: http://n2.nabble.com/file/n4037146/n2000_arealdekkeflate.zip

Regards,
Pål Kristensen
The Norwegian Mapping Authority


-----

Regards,
Pål Kristensen
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