[Mapserver-users] crash using srs parameter in getmap request
John Pulles
john.pulles at geodan.nl
Fri Jun 11 13:48:30 PDT 2004
Ha Bart,
I downloaded that zip file and indeed this version doesn't show the
crashing behaviour. So as far as I know the problem is solved in version
4.2 for both Linux and Windows.
It's a pity the 4.2 windows binary is not yet available in the standard
mapserver download pages...
Kind regards,
John.
bartvde at xs4all.nl wrote:
>Hi John,
>
>4.2 release binaries are available at Maptools.org. I would suggest to try
>them out to see if the problem really disappeared.
>
>http://www.maptools.org/dl/mapserver-4.2.0-win32-php4.3.4.zip
>
>Best regards,
>Bart
>
>
>
>>Ed McNierney wrote:
>>
>>
>>
>>>Folks -
>>>
>>>What version of MapServer are you running when you get this crash? My
>>>memory is being fuzzy right now, but there was a bug quite a while ago
>>>that had something to do with a buffer/pointer problem with SRS
>>>parameters (I think). I ran into it and Daniel fixed it - but it was
>>>rather a long time ago. If you're using an old version of MapServer,
>>>try something newer.
>>>
>>>
>>>
>>>
>>>
>>Hi again,
>>
>>The crash 'succeeded' with MapServer version 4.2-beta2 on W2K (from
>>http://160.94.77.165/ms42b2_gif_pg.zip). As far as I know, mapserver
>>version 4.2 is only available as a beta, so after suggestions to upgrade
>>to version 4.2, it seemed worth to try to build mapserver 4.2 on Linux.
>>With this version the crash does NOT occur and the url returns an image
>>with or without srs parameters for both desired projections.
>>Question that remains is if the problem in beta2 occurred because of
>>the beta status or because of the windows version?
>>
>>John.
>>
>>
>>
>>> - Ed
>>>
>>>Ed McNierney
>>>President and Chief Mapmaker
>>>TopoZone.com
>>>-----Original Message-----
>>>From: mapserver-users-admin at lists.gis.umn.edu
>>>[mailto:mapserver-users-admin at lists.gis.umn.edu] On Behalf Of
>>>craig.gould at bt.com
>>>Sent: Thursday, June 10, 2004 9:17 AM
>>>To: Tom.Kralidis at ec.gc.ca; john.pulles at geodan.nl;
>>>mapserver-users at lists.gis.umn.edu
>>>Subject: RE: [Mapserver-users] crash using srs parameter in getmap
>>>request
>>>
>>>Tom,
>>>
>>>If John's crash is anything like the crash I experienced then it is the
>>>actual mapserv process on the machine that crashes with a null pointer
>>>exception somewhere.
>>>
>>>This crash only happens with certain types of projections. I was using
>>>British National Grid (BNG). The native projection of the WMS server was
>>>BNG, and the native projection of the WMS client was BNG. However if I
>>>include the SRS parameter then the map server process on the WMS server
>>>crashed (however not if you used a browser and did a standard request).
>>>If I took out the SRS parameter via a redirecting page the process did
>>>not crash.
>>>
>>>Upper and lower case made no difference for me. The application still
>>>crashed.
>>>
>>>BTW, when I found this problem I posted it on this list, but got no
>>>answer back. Since then at least two other people have posted similar
>>>problems. Each time I've let them know how I got round the problem.
>>>Unfortunately I can't get seem to get map server to compile on my win
>>>machine so I can't look into where this may be happening.
>>>
>>>Craig.
>>>
>>>
>>>
>>>
>>>-----Original Message-----
>>>From: Kralidis,Tom [Burlington] [mailto:Tom.Kralidis at ec.gc.ca]
>>>Sent: 10 June 2004 14:04
>>>To: Gould,CR,Craig,XGH6A C; john.pulles at geodan.nl;
>>>mapserver-users at lists.gis.umn.edu
>>>Subject: RE: [Mapserver-users] crash using srs parameter in getmap
>>>request
>>>
>>>
>>>
>>>Comments:
>>>
>>>
>>>
>>>- What do you mean by MapServer crashing? Are you getting a 500 error?
>>>Are you getting an OGC Service Exception Report XML document?
>>>- What is the *native* projection of the data? This is what should be
>>>declared in the PROJECTION block foreach layer
>>>- try your "wms_srs" declaration with lowercase (i.e. "init=epsg:28992")
>>>- trying a WMS GetMap request without the SRS keyword is an invalid
>>>request, and should throw an exception
>>>- WMS is not the problem. A WMS shall support all SRS projections it
>>>advertises in Capabilities
>>>
>>>..Tom
>>>
>>>=========================
>>>Tom Kralidis
>>>Systems Scientist
>>>Environment Canada
>>>Tel: +01-905-336-4409
>>>http://www.ec.gc.ca/
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: mapserver-users-admin at lists.gis.umn.edu
>>>>[mailto:mapserver-users-admin at lists.gis.umn.edu] On Behalf Of
>>>>craig.gould at bt.com
>>>>Sent: Thursday, June 10, 2004 7:33 AM
>>>>To: john.pulles at geodan.nl; mapserver-users at lists.gis.umn.edu
>>>>Subject: RE: [Mapserver-users] crash using srs parameter in
>>>>getmap request
>>>>
>>>>
>>>>John,
>>>>I and a few others have found the same problem.
>>>>The way round it is to create a web page that is called
>>>>instead of the opengis mapserver. This page forwards the
>>>>request to the mapserver but strips out the SRS paramater. If
>>>>the map server is using the projection you want returned by
>>>>default, then everything ends up OK. BTW this only happens
>>>>with certain projection types. Regards, Craig.
>>>>
>>>>
>>>>-----Original Message-----
>>>>From: mapserver-users-admin at lists.gis.umn.edu
>>>>[mailto:mapserver-users-admin at lists.gis.umn.edu] On Behalf Of
>>>>John Pulles
>>>>Sent: 10 June 2004 10:28
>>>>To: mapserver-users at lists.gis.umn.edu
>>>>Subject: [Mapserver-users] crash using srs parameter in getmap request
>>>>
>>>>
>>>>Hi List
>>>>
>>>>Using a map file with projection settings as shown below, I
>>>>get a crash of mapserver when doing an opengis getmap request
>>>>with &srs=epsg:28992. With an absent srs parameter or with
>>>>&srs=epsg:4326 a correct map is returned. Does anyone have an
>>>>idea what could be wrong?
>>>>
>>>>BTW: I am using MapServer version 4.2-beta2 on W2K, with the
>>>>PROJ_LIB environment variable set to the directory containing
>>>>the epsg file.
>>>>
>>>>
>>>>Regards,
>>>>John Pulles.
>>>>
>>>>MAP
>>>> NAME "Demo"
>>>>
>>>> PROJECTION
>>>> # RD
>>>> "init=EPSG:28992"
>>>> END
>>>>
>>>> EXTENT 10000 305000 280000 619000
>>>>
>>>> SHAPEPATH "c:\kaarten"
>>>> UNITS meters
>>>>
>>>> WEB
>>>> METADATA
>>>> "wms_title" "Demo"
>>>> "wms_srs" "EPSG:4326 EPSG:28992"
>>>> END
>>>> END
>>>>
>>>> LAYER
>>>> NAME provincies
>>>> DATA "provincies"
>>>> STATUS ON
>>>> METADATA
>>>> "wms_title" "Provincies"
>>>> "wms_srs" "EPSG:4326 EPSG:28992"
>>>> END
>>>> TYPE POLYGON
>>>> CLASS
>>>> COLOR 212 212 212
>>>> OUTLINECOLOR 0
>>>> END
>>>> PROJECTION
>>>> # RD
>>>> "init=EPSG:28992"
>>>> END
>>>> END
>>>>END
>>>>
>>>>--------------------
>>>>
>>>>
>>>>
>>>>
>>>>_______________________________________________
>>>>Mapserver-users mailing list Mapserver-users at lists.gis.umn.edu
>>>>http://lists.gis.umn.edu/mailman/listinfo/maps> erver-users
>>>>
>>>>
>>>>_______________________________________________
>>>>
>>>>Mapserver-users mailing list
>>>>Mapserver-users at lists.gis.umn.edu
>>>>http://lists.gis.umn.edu/mailman/listinfo/maps> erver-users
>>>>
>>>>
>>>>
>>>>
>>>>
>>>_______________________________________________
>>>Mapserver-users mailing list
>>>Mapserver-users at lists.gis.umn.edu
>>>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>--
>>
>>-------------------------------------
>>Geodan IT b.v.
>>Buitenhaven 27-A
>>5211 TP 's-Hertogenbosch (NL)
>>-------------------------------------
>>Tel: +31 (0)73 - 692 5151
>>Fax: +31 (0)73 - 692 5150
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>>-------------------------------------
>>Postadres / mailing address
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>>1079 MB Amsterdam (NL)
>>-------------------------------------
>>E-mail: john.pulles at geodan.nl
>>Website: http://www.geodan.nl
>>Disclaimer: http://www.geodan.nl/disclaimer
>>-------------------------------------
>>
>>
>>
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>>Mapserver-users mailing list
>>Mapserver-users at lists.gis.umn.edu
>>http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
>>
>>
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--
-------------------------------------
Geodan IT b.v.
Buitenhaven 27-A
5211 TP 's-Hertogenbosch (NL)
-------------------------------------
Tel: +31 (0)73 - 692 5151
Fax: +31 (0)73 - 692 5150
Mobiel: +(0)6 - 1234 5678
-------------------------------------
Postadres / mailing address
President Kennedylaan 1
1079 MB Amsterdam (NL)
-------------------------------------
E-mail: john.pulles at geodan.nl
Website: http://www.geodan.nl
Disclaimer: http://www.geodan.nl/disclaimer
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