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xslt transformation not working in WAS6.1 server start mode

priya verma
Greenhorn

Joined: May 09, 2007
Posts: 13
Hi All,

I have a xslt transformation code. In RAD 7.0 (on WAS 6.1 or WAS 7), when I start my server in debug mode, the xslt transformation is happening properly without errors. However when I start my server in normal(start) mode, the xslt transformation code throughs following error:

[i]wsjar:file:/C:/MyApp/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/MyApp.ear/WebSrv.jar!/XSL/Response.xsl; Line #12; Column #58; java.lang.ClassCastException: org.apache.xpath.objects.XString incompatible with org.apache.xpath.objects.XNodeSet


When I run the same xslt transformation in RAD 6.0 ( WAS 5.1 ), it works correctly in server start and debug mode.As xslt code is running fine in server debug mode, I think there is no problem in the code. I am not able to make out what is the difference between the WAS 5.1 and WAS 6.1/7 and the difference between WAS server start and debug mode, that is causing this error?

Could anybody please help me in the same!

Thanks in advance!

Priya
Cameron Wallace McKenzie
author and cow tipper
Saloon Keeper

Joined: Aug 26, 2006
Posts: 4968

You likely have a classloader issue.

Different versions of WebSphere gets packaged with different versions of various files. If a newer version of WebSphere has updated their libraries, the old libraries you are depending upon might cause problems.

What is the name of that jar file your problem class is packaged in? Look on your classpath for similar named jar files. Perhaps you can find another implementation of these class files somewhere else on the classloader hierarchy.

Alternatively, sometimes just switchning the classloader to parent-last, especially if you have the jar files packaged within the web application, will force WebSphere to use your own version, rather than the servers version.

Here's a little tutorial I put together on classloading and application packaging with WebSphere. You might find it helps to explain what is happening with your varous classloaders:

Understanding WebSphere Classloaders: Classloaders Demystified

-Cameron McKenzie
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18141
    
    8

And if your application includes a jar file containing Apache's implementation of XPath -- or any other apparently related jar file -- try not including that jar file.
 
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