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https://issues.apache.org/jira/browse/SLING-1700?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Müller resolved SLING-1700.
--------------------------------

    Resolution: Fixed

Commitet a modifed version in r990926. Please let me know if you have any 
problems with this version.

> contrib/scripting/velocity embeds velocity, causing classloading issue at 
> runtime
> ---------------------------------------------------------------------------------
>
>                 Key: SLING-1700
>                 URL: https://issues.apache.org/jira/browse/SLING-1700
>             Project: Sling
>          Issue Type: Bug
>          Components: Scripting
>         Environment: Felix 1.4, Sling 2.0.7, Apache Velocity 1.6.2
>            Reporter: Olaf Otto
>            Assignee: Mike Müller
>         Attachments: SLING-1700-mykee.patch, SLING-1700-ootto.patch
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> Affects: Rev. 989119 of 
> https://svn.apache.org/repos/asf/sling/trunk/contrib/scripting/velocity 
> (2.0.0-SNAPSHOT)
> The maven-bundle-configuration in the pom of the velocity support module 
> (https://svn.apache.org/repos/asf/sling/trunk/contrib/scripting/velocity/pom.xml)
>  embeds a couple of dependencies:
> ...
>                         <Embed-Dependency>
>                             velocity;oro;commons-lang;inline=true
>                         </Embed-Dependency>
> ...
> However, these libraries are available as bundles and should not be embedded. 
> In the case of velocity, this causes an issue when a apache velocity bundle 
> is also deployed in felix, as the org.apache.velocity.runtime.log.LogChute 
> interface is loaded from both the velocity scripting support bundle and the 
> deployed apache velocity bundle:
> Suggested resolution: Remove the embedding. It is bad practice anyway. I've 
> successfully tested this with the following maven-bundle-configuration 
> configuration:
>                 <configuration>
>                     <instructions>
>                         <Private-Package>
>                             org.apache.sling.scripting.velocity
>                         </Private-Package>
>                         <Import-Package>
>                               org.apache.velocity.runtime.log,
>                             com.werken.xpath; javax.sql;
>                             org.apache.commons.*; org.apache.log.*;
>                             org.apache.log4j; org.apache.tools.ant.*;
>                             org.jdom.*;resolution:=optional, *
>                         </Import-Package>
>                         
>                         <ScriptEngine-Name>${pom.name}</ScriptEngine-Name>
>                         
> <ScriptEngine-Version>${pom.version}</ScriptEngine-Version>
>                     </instructions>
>                 </configuration>

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