Re: [Qexo-general] Strange special character problem

[Per Bothner]

Markus Skistad wrote:
> However, I've allready stumbled upon yet another problem with my xquery 
> program which I'm pretty sure can be traced back to a Kawa/Qexo memory 
> leak. After running a pretty simple xquery around 10-20 times, tomcat 
> throws me a java.lang.outofmemory error. I've tried it on two separate 
> systems, both giving me the same error. Even after upping the memory 
> limit for tomcat. Listed below is the xquery.

You didn't say how big the content.xml file is, nor how you're deploying it.
And a memory leak can be all kinds of places.

The only thing I can think out is in gnu.kawa.xml.Document.parseCached.
It maintains a cache of parsed XML documents, as required by the XQuery
specification. However, the cache is local to the "current environment",
and typically there is a separate "current environment " for each thread.
So if each query ends up being executed in a different thread, and none
of the threads ends up being collected, that might be a problem.  Now
why that would happen, I don't know.  But trying to instrument the
parseCached, and the allocation/finalization of Environments may be a
way to track the problem down.
--
        --Per Bothner
address@hidden   http://per.bothner.com/