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From Joe Bohn <>
Subject Re: Geronimo and Grails
Date Fri, 24 Oct 2008 18:13:31 GMT

I've been playing around with grails and I encountered this exact same 
behavior Michael mentioned.  Even with Gianny's recommended hidden 
classes I received the dom4j InvalidXPathException on the Tomcat Javaee5 

I was able to get a grails app working on a tomcat javaee5 assembly by 
adding just one more filter for the jaxen classes.  So, my 
geroniom-web.xml looks like this:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="">
     <environment xmlns="">

BTW, it is true that you can deploy a grails app into either minimal 
assembly without any hidden-class filters in the deployment plan.  The 
additional libraries in the javaee5 assemblies make the filters 
necessary.  Apparently there are some classloader differences between 
the Jetty and Tomcat assemblies that make the jaxen addition necessary 
when deploying to a Tomcat Javaee5 server.


michaelg wrote:
> I am writing an article for IBM developerWorks on using Grails and Geronimo
> together. However, I am unable to deploy a Grails WAR to Geronimo. 
> I first tried it with Geronimo 2.1.1 with Jetty. The error I got was a
> NoClassDefFound for org.apache.commons.fileupload.FileItemFactory. This
> class is the Geronimo repository, and is also included with the Grails war.
> It's the same version for both. 
> Next I tried it with Geronimo 2.1.1 with Tomcat. This time I got a dom4j
> InvalidXPathException. 
> Next I tried the Little G distribution. It worked perfectly. I had also
> tried standalone Tomcat with success as well, so I guess this should not
> have been too surprising.
> Obviously I have to point a finger at Grails or Geronimo, and since it works
> fine on Tomcat or Little G, I am pointing the finger at Geronimo. The
> Geronimo/Jetty error sure smelled like a class loader problem, but I have no
> clue on the Geronimo/Tomcat. Note, in all cases I included a Geronimo
> deployment plan inside the WAR (/WEB-INF/geronimo-web.xml) 
> Any ideas/advice is greatly appreciated.

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