On May 3, 2011, at 9:40 AM, Vincent Massol wrote:

> 
> On May 3, 2011, at 9:39 AM, Vincent Massol wrote:
> 
>> Hi Andy,
>> 
>> On Apr 27, 2011, at 1:25 PM, andyp wrote:
>> 
>>> Hi all,
>>> 
>>> I'm trying to install the XWiki war file on a Ubuntu virtual machine (KVM)
>>> but as yet with no success.  I've installed and configured java, jboss and
>>> mysql using all the information I could find from your website:
>> 
>> [snip]
>> 
>>> 01:36:10,087 WARN  [ClassLoaderManager] Unexpected error during load
>>> of:org.apache.jackrabbit.core.query.lucene.WildcardQuery$WildcardQueryWeight:
>>> java.lang.IncompatibleClassChangeError: Implementing class
>> 
>> [snip]
>> 
>>> 01:36:10,936 WARN  [ClassLoaderManager] Unexpected error during load
>>> of:org.apache.jackrabbit.core.query.lucene.MatchAllWeight:
>>> java.lang.IncompatibleClassChangeError: Implementing class
>> 
>> [snip]
>> 
>> As you can see in the error above the problem is an incompatible version. 
>> JBoss uses Jackrabbit in a given version and XWiki users another version of 
>> Jackrabbit.
>> 
>> It's the role of the appserver to isolate classloader so that a webapp can 
>> use whatever version it wants in WEB-INF/lib.
>> 
>> You need to configure JBoss to provide this isolation. You need to check 
>> Jboss's doc for that.
> 
> I just googled it quickly and found
> http://community.jboss.org/wiki/ClassLoadingConfiguration

I've updated 
http://platform.xwiki.org/xwiki/bin/view/AdminGuide/InstallationJBoss with this 
information.

Thanks
-Vincent

> 
> Hope it helps,
> -Vincent
> 
>> 
>> Alternatively you could remove xwiki'ds jackrabbit version from WEB-INF/lib  
>> (make sure the version used by jboss is greater than the one used by xwiki).
>> 
>> Thanks
>> -Vincent
>> 
>>> Can anyone see what I'm doing wrong?  All the information on the web seems a
>>> little old – I'm using JBoss 6.  I would be grateful if anyone could help
>>> shed any light on this issue.
>>> 
>>> Cheers,
>>> Andy
> 

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