Okay I got back an amazing story that is more to do with Zoo WPS then 
geotools...
- File permission exceptions were more about the classpath being set up wrong
- Stack Overflow was more about executing GeoTools from within an embedded 
Java; it requires a lot of classes to do this and they ran out of stack. The 
defaults for embedded Java are different then for a normal JVM

Jody

On 09/06/2010, at 8:20 PM, Jody Garnett wrote:

> Scott will have to fill in with the details; thus far I have been unable to 
> reproduce a test case with reduced permissions (sigh!).
> 
> Jody
> 
> On 09/06/2010, at 6:34 PM, Ben Caradoc-Davies wrote:
> 
>> On 09/06/10 15:45, Jody Garnett wrote:
>>> Ben I think this is the problem you were working on when packaging stuff up 
>>> in jar form?
>> 
>> No, that is to prevent network loading of remote schemas; 
>> app-schema-resolver looks in jar files first to prevent that.
>> 
>>> Can you see anything in there that would go off and check disk? And thus 
>>> fail a security check?
>> 
>> No, that is really weird. What is the exact error?
>> 
>> Are you missing a jar, or otherwise causing classpath lookup to do 
>> something suspicious? That is the only filesystem access that I can 
>> think of that might occur. Can you start your JVM with class loader 
>> debugging enabled (like Sun Java -verbose:class)?
>> 
>> I am ignorant of the internals of Zoo WPS (although I did see them at 
>> FOSS4G 2009).
>> 
>> Kind regards,
>> 
>> -- 
>> Ben Caradoc-Davies <[email protected]>
>> Software Engineering Team Leader
>> CSIRO Earth Science and Resource Engineering
>> Australian Resources Research Centre
>> 
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