I'm having a problem lately with using Xerces-J 2.0.1 lately under Tomcat that I never 
seemed to have before. Perhaps it's the version that is incorrect because it seems 
that Tomcat used Xerces before. The weird thing about this problem is that it doesn't 
always show up in similiar test cases. I came across it while tring to set up Cocoon 
2.0.2.

On my WinXP machine running Tomcat 4.0.3, Xerces 2.0.1, using the xml-api.jar from 
Xalan-2.3.1, and the latest cocoon, I can get the front cocoon page to run, but a lot 
of the samples bomb out with exception messages (I don't have one on hand now 
unfortunately).

On a RedHat 6.2 box, using JDK 1.3.1, Tomcat 4.0.3, and the same cocoon/xerces/xalan 
configuration, I get the following error even when tring to access the root of the 
cocoon webapp:

type fatal

message SAX2 driver class org.apache.xerces.parsers.SAXParser does not implement 
XMLReader

description java.lang.ClassCastException: 
org.apache.xerces.parsers.StandardParserConfiguration

sender org.apache.cocoon.servlet.CocoonServlet

source Cocoon servlet

stack-trace

java.lang.ClassCastException: org.apache.xerces.parsers.StandardParserConfiguration
    at org.xml.sax.helpers.XMLReaderFactory.createXMLReader(Unknown Source)
    at org.xml.sax.helpers.XMLReaderFactory.createXMLReader(Unknown Source)
    at 
org.apache.cocoon.components.language.markup.AbstractMarkupLanguage.generateCode(AbstractMarkupLanguage.java:377)
    at 
org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.generateResource(ProgramGeneratorImpl.java:365)
    at 
org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.createResource(ProgramGeneratorImpl.java:328)
    at 
org.apache.cocoon.components.language.generator.ProgramGeneratorImpl.load(ProgramGeneratorImpl.java:291)
    at org.apache.cocoon.sitemap.Handler.run(Handler.java:270)
    at java.lang.Thread.run(Thread.java:484)

request-uri

/cocoon/

I looked through the Xerces sources, and it does seem to be the case that the xerces 
SAXParser from 2.0.1 does not implement XMLReader, even through inheritance. So 
apparently Tomcat wants to use it through JAXP, and my main question is why does this 
error only show up part of the time. Is there an incompatibility with Tomcat 4.0.X and 
the latest Xerces? Sorry for the post to multiple lists, but I'm not yet sure of where 
the problem really lies. Thank you!

/S

-- 
Steven Cummings <[EMAIL PROTECTED]>
Columbia, MO



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