[mapserver-users] MapScript resultsGetShape confusion [solved!]

[Worth Lutz]

This may be the problem I had when I tried to update to 5.6.3. from 5.6.1.

I'm in the middle of a project and did not have time to figure out what was
causing the problem.  The only change was the change to the MapServer
version so I quickly reverted back.  I'm using PHP Mapscript.  I'll see if I
can find the time to check to see if this is the problem I was having.

Worth

-----Original Message-----
From: mapserver-users-bounces at lists.osgeo.org
[mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Christian
Jauvin
Sent: Wednesday, June 02, 2010 11:18 AM
To: Daniel Morissette
Cc: mapserver-users at lists.osgeo.org
Subject: Re: [mapserver-users] MapScript resultsGetShape confusion [solved!]

Ok.. so with a lot of fiddling around (and with inspiration from a
Frank Warmerdam's testing script) I've been able to find the cause of
the problem, as well as its solution: with a PostGIS connected layer,
a call to resultsGetShape *has* to include the third parameter,
"tileindex":

resultsGetShape(shp, res.shapeindex) --> hangs MS 5.6.3
resultsGetShape(shp, res.shapeindex, res.tileindex) --> works great!

I don't know if it's really a bug, but it contradicts the
documentation, in which the tileindex argument is optional, and it
wasn't behaving like that (to my knowledge) with MS in [5.6.0, 5.6.2].

By the way, an initial observation I made was wrong: it also affects
the PHP version, and the workaround is the same.

Best regards,

Christian


On Tue, Jun 1, 2010 at 5:02 PM, Daniel Morissette
<dmorissette at mapgears.com> wrote:
> Christian Jauvin wrote:
>>
>> I did what you suggested, and added:
>>
>> CONFIG "MS_ERRORFILE" "<error file>"
>> CONFIG "CPL_DEBUG" "ON"
>> DEBUG 5
>>
>
> Did you also include DEBUG 5 inside the POSTGIS layer itself?
>
>
>> to my mapfile, and performed my query again. It generated a very long
>> file (200K+ lines!) with only two types of line:
>>
>> [Tue Jun  1 14:36:01 2010].765230 getSymbol(): Symbol definition
>> error. Parsing error near (null):(line 208)
>> [...]
>> [Tue Jun  1 14:36:01 2010].777963 msPostGISLayerResultsGetShape called
>> for record = 338
>> [...]
>>
>
> 200k times the same message sounds like an infinite loop of some sort.
>
> Perhaps look at the first few lines of debug/error messages. There may be
a
> different message that would have been output *before* entering the
infinite
> loop and that could give a hint about what is happening. Just a guess...
> can't do much more from here.
>
> What is the last version that worked fine? 5.6.2?
>
> Daniel
> --
> Daniel Morissette
> http://www.mapgears.com/
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> mapserver-users at lists.osgeo.org
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>
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