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ed beSubject: XSLT OutOfMemoryError
Author: ed be
Date: 09 May 2008 07:14 PM

I get a "OutOfMemoryError: Java heap space" when transforming a big XML file of 500 MB.
I use JDK 1.5 default XSLTC processor. I have set the maximum java heap size to 1 giga.

Is this problem related to XSLTC? Should I use another transformer ?
How can I process files of this size?

My code:

javax.xml.transform.TransformerFactory tFactory = javax.xml.transform.TransformerFactory.newInstance();

InputStream xslInputstream = this.getClass().getClassLoader().getResourceAsStream(xsl);

Transformer transformer = tFactory.newTransformer(new StreamSource(xslInputstream));

transformer.transform(new StreamSource(inputStream), new StreamResult(outputStream));


Tony LavinioSubject: XSLT OutOfMemoryError
Author: Tony Lavinio
Date: 10 May 2008 05:23 PM
While if you write your XSLT very carefully and use Saxon 9,
theoretically you could process it, we know of no Java-based
XSLT engine that will handle a file anywhere near that large.
There is some documentation at http://www.saxonica.com/ that
might help a little in some specific cases.

Consider that XSLT generally works on an in-memory representation
of the file, and the in-memory version of an XML document is
typically 4-10x the size on disk.

You might be able to process it using DataDirect XQuery, which
is designed to work with larger files and works in a streaming

ed beSubject: XSLT OutOfMemoryError
Author: ed be
Date: 13 May 2008 08:19 AM
Thanks for the info.

Are there other forum members that have experience in transforming big files with open source XSLT implementations ?

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