Mapserver returns blank pages

Stuart Eve stuarteve at LPARCHAEOLOGY.COM
Thu Jul 13 02:38:05 PDT 2006


After checking the apache error log we also get:

[Thu Jul 13 10:22:02 2006] [notice] child pid 9429 exit signal 
Segmentation fault (11)

We are using mapserver 4.8.3, php 4.3.10 and apache 2.0.53 running on a 
Suse 10 box.

The mapscript functions that seem to be in use when the crash is caused 
are: queryByAttributes(), getResult() and getShape()

should we list this as a bug on Bugzilla?

Thanks

Stuart


Stuart Eve wrote:
> We are having (and have had for while_ this problem - and it does seem 
> reasonably random.
>
> The main trouble is that I don't know how to get php to spew out the 
> error - and instead it just returns this blank screen, instead of 
> returning the error as it does normally. I had first thought that it 
> was because I was using php mapscript and had nested functions - but 
> it seems like lots of people are coming up with the same thing.
>
> Anyone got any ideas?
>
> Matthew Kane wrote:
>> I wasn't actually using php mapscript in the mapfile that gave me 
>> segmentation faults. Strangely, I got the map to display on a Sun 
>> machine if I removed all references to true-type fonts and relied 
>> only on bitmap fonts for my labels. Even more strange is that when I 
>> moved the same file to a red hat server, mapserver simply hangs. No 
>> error message in either the browser or the apache error logs, just 
>> hanging. The same thing happened when I tried running the mapfile 
>> with shp2img. Has anyone else experienced this problem? Could this be 
>> a bug in one of the third party libraries that mapserver relies on? 
>> Or more likely a problem in how we code our mapfiles?
>>
>> Thanks,
>> Matt
>>
>> On 7/12/06, *antti siukola* <siukola.antti at gmail.com 
>> <mailto:siukola.antti at gmail.com>> wrote:
>>
>>     Hi!
>>
>>     As we can see a lot of people are suffering from this but no one
>>     seems
>>     to have any solutions. Does this only appear with php mapscript? Is
>>     this a bug? A known bug? Is there a solutions? This is a fatal error
>>     since this kind of behavior avoids us to use php mapscript in
>>     production, in case this is a php mapscript issue as it seems to be.
>>
>>     Regards,
>>
>>     Antti S
>>
>>     On 6/13/06, Matthew Kane < markane at indiana.edu
>>     <mailto:markane at indiana.edu>> wrote:
>>     > I second that question, as I am receiving Segmentation Faults
>>     as well...
>>     >
>>     > Matt
>>     >
>>     > On 6/13/06, antti siukola < siukola.antti at gmail.com
>>     <mailto:siukola.antti at gmail.com>> wrote:
>>     > > Hi!
>>     > >
>>     > > Every time MapServer returns a blank page I find "[notice]
>>     child pid
>>     > > xxxx exit signal Segmentation fault (11)" from apache's
>>     error_log. Any
>>     > > thoughts? Blank pages are returned randomly.
>>     > >
>>     > > AnttiS
>>     > >
>>     >
>>
>>
>
>
> -- 
> Stuart Eve
> L - P : Archaeology
> stuarteve at lparchaeology.com 


-- 
Stuart Eve
L - P : Archaeology
stuarteve at lparchaeology.com 

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