[Chameleon] Ugly,how to find reason for random chrashes in Chameleon/PHP/NTDLL.dll

Erik Baluba erik1969 at mailhaven.com
Thu May 12 07:16:29 EDT 2005

Hi Bart,

Perhaps that's the reason why there are no such binaries around, because
Oracle and Mapscript doesn't really work :-/
I have tested my setup on a Win2k server today, and the same problems
persist. Funny thing is that I haven't even been accessing Oracle yet,
I'm testing against the Chameleon samples, which only use Shapefile
input! I'm therefore not convinced that the problem in my case is Oracle
related. I looked a bit more on the binaries you created. I noticed the
Mapserver CGI binary is extremely small, just 36kb, and the mapscript
dll is also very small compared to those in default ms4w installation.
Are they stripped or something? Perhaps my WinDbg trap would be able to
show more information if the Mapscript had full debug info?  I also
noticed that it depends on xerces 1.6, which is rather old...

Anyway, your suggestion on WMS sounds like a good idea, although I
expect it will be somewhat slower? We have been accessing Oracle with a
Mapserver CGI for a couple of years without hickups. I'm not experienced
with using WMS layers. To be sure I understand you correctly, are you
suggesting that I use a Mapscript binary without Oracle support for
Chameleon, and then a Mapserver binary with Oracle support as a CGI to
connect to Oracle? Would you mind sending me a small extract from one of
your mapfiles which illustrates how things are done.

Thanks for your help.


On Thu, 12 May 2005 10:00:11 +0200, "Bart van den Eijnden"
<BEN at Syncera-ITSolutions.NL> said:
> Hi Erik,
> I have always found Mapscript with Oracle Spatial unstable and I have
> been unable to figure out if it is caused by the builds. The approach I
> normally followed was use Mapserver CGI to connect to Oracle and use an
> OGC:WMS layer in Chameleon.
> Nicolas Fortin also has some experience with this, Nicolas did you ever
> get the Oracle/PHP Mapscript binaries to work properly?
> Erik, if you need help setting up a build environment let me know.
> Best regards,
> Bart
> Bart van den Eijnden
> Syncera-ITSolutions
> Postbus 270
> 2600 AG  DELFT
> tel.nr.: 015-7512436
> email: BEN at Syncera-ITSolutions.nl
> >>> "erik" <erik1969 at mailhaven.com> 05/11/05 11:52pm >>>
> Paul,
> I second your guess regarding Mapserver. I did verify with Bart who
> compiled
> the binary that we use the same PHP version. I hope to test everything on
> another machine, perhaps with Win2000. I think I also should test the
> Mapserver/Mapscript binaries on a plain Apache/PHP setup, without the
> ms4w
> and Chameleon environment.
> Anyway, I'm a bit surprised that it is so hard to find
> Mapserver/PHP-Mapscript binaries with Oracle support on Windows. I mean,
> lots of people use mapserver, Oracle is a popular database, and PHP is
> perhaps the most popular web-scripting language. Still I couldn't find
> such
> a Mapserver binary. Fortunately it was kindly provided to me by Bart van
> den
> Eijnden at http://www.xs4all.nl/~bartvde/ 
> Perhaps I just have to dig in and setup a compiling environment for all
> this
> myself, since I will need such Mapserver binaries in the future also. The
> documentation on the Mapserver home pages basically just say "good luck"
> to
> those who plan to compile this setup on Windows :-/
> regards,
>   erik
> Paul Spencer wrote:
> > yikes.  Never seen this, nor heard of it until now.  Of course, I'm on
> > linux so that's not particularly startling ;)
> >
> > I personally suspect your mapserver build.  Can you try it with a
> > different version (i.e. a 4.4.2 version)?  One without the Oracle drivers?
> >
> > Paul
> ....
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  Erik Brenn
  erik at fastmail.fm

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