[BUG] XSLT Transformation failed with "The TransformerHandler is not serially reusable."

[KonradEichstaedt]

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Describe the bug If we call an XSLT Script with existdb 6.0.1 the exceution failed with following Exception:

java.lang.UnsupportedOperationException: The TransformerHandler is not serially reusable. The startDocument() method must be called once only. at net.sf.saxon.jaxp.TransformerHandlerImpl.startDocument(TransformerHandlerImpl.java:91) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.event.ContentHandlerProxy.open(ContentHandlerProxy.java:281) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.event.ProxyReceiver.open(ProxyReceiver.java:88) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.event.SequenceNormalizer.open(SequenceNormalizer.java:54) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.event.ProxyReceiver.open(ProxyReceiver.java:88) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.event.ComplexContentOutputter.open(ComplexContentOutputter.java:182) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.trans.XsltController.prepareOutputReceiver(XsltController.java:806) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.trans.XsltController.applyTemplates(XsltController.java:689) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.s9api.AbstractXsltTransformer.applyTemplatesToSource(AbstractXsltTransformer.java:347) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.s9api.XsltTransformer.transform(XsltTransformer.java:349) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.jaxp.TransformerImpl.transform(TransformerImpl.java:71) ~[Saxon-HE-9.9.1-8.jar:?] at net.sf.saxon.jaxp.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:173) ~[Saxon-HE-9.9.1-8.jar:?] at org.exist.util.serializer.ReceiverToSAX.endDocument(ReceiverToSAX.java:81) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.storage.serializers.XIncludeFilter.endDocument(XIncludeFilter.java:157) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.storage.serializers.Serializer.toSAX(Serializer.java:965) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.util.serializer.XQuerySerializer.serializeXML(XQuerySerializer.java:94) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.util.serializer.XQuerySerializer.serialize(XQuerySerializer.java:75) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.http.RESTServer.writeResultXML(RESTServer.java:2142) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.http.RESTServer.writeResults(RESTServer.java:2106) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.http.RESTServer.executeXQuery(RESTServer.java:1559) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.http.RESTServer.doGet(RESTServer.java:516) ~[exist-core-6.0.1.jar:6.0.1] at org.exist.http.servlets.EXistServlet.doGet(EXistServlet.java:324) ~[exist-core-6.0.1.jar:6.0.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) ~[javax.servlet-api-3.1.0.jar:3.1.0] at org.exist.http.servlets.EXistServlet.service(EXistServlet.java:588) ~[exist-core-6.0.1.jar:6.0.1] at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) ~[javax.servlet-api-3.1.0.jar:3.1.0]

Expected behavior XSLT Transformation failed because of Saxon Error.

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:xs="http://www.w3.org/2001/XMLSchema" exclude-result-prefixes="xs" version="2.0">
    <xsl:output encoding="UTF-8" method="text"/>
    <xsl:template match="/">
        <xsl:for-each select="//url">
            <xsl:value-of select="concat('http://..../exist/rest/db/kpe/', replace(., '/db/kpe/', ''), '?_indent=no')"/>
            <xsl:text>
</xsl:text>
        </xsl:for-each>
    </xsl:template>
</xsl:stylesheet>

Context (please always complete the following information):

• OS: Linux Debian 11
• eXist-db version: 6.0.1
• Java Version 11

[dizzzz]

Please could you check this with Saxon alone? As I see it right now, this is a Saxon specific issue?

[KonradEichstaedt]

yes you are right this is an issue with saxon but existdb needs update the relevant dependency to saxon 9.1

https://www.oxygenxml.com/archives/xsl-list/200906/msg00012.html