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https://issues.apache.org/jira/browse/MTOMCAT-257?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14019548#comment-14019548
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Andreas Christoforides commented on MTOMCAT-257:
------------------------------------------------

I ran into another case of this issue so I looked at the code to see how the 
"useSeparateTomcatClassLoader" parameter is used.

It seems the issue was introduced by this change:
http://svn.apache.org/viewvc/tomcat/maven-plugin/tags/tomcat-maven-plugin-2.0/tomcat6-maven-plugin/src/main/java/org/apache/tomcat/maven/plugin/tomcat6/AbstractRunMojo.java?r1=1297072&r2=1297073&;

All dependencies of the plugin are added to the separate Tomcat classoader. 

It certain cases that is desirable as described in:
https://issues.apache.org/jira/browse/MTOMCAT-122

In other cases, it makes the plugin unusable since it brings in unwanted 
libraries like slf4j and google guava.

> Classpathes separation between plugin and application is broken (can't use 
> slf4j-jcl in app)
> --------------------------------------------------------------------------------------------
>
>                 Key: MTOMCAT-257
>                 URL: https://issues.apache.org/jira/browse/MTOMCAT-257
>             Project: Apache Tomcat Maven Plugin
>          Issue Type: Bug
>          Components: tomcat7
>    Affects Versions: 2.1
>            Reporter: Brendan Le Ny
>            Assignee: Olivier Lamy (*$^¨%`£)
>         Attachments: MTOMCAT-227-2.zip, MTOMCAT-227.tgz
>
>
> I use in my war the slf4j-jcl, which is not compatible with the 
> jcl-over-slf4j used in the plugin dependencies.
> I give you a little project that show the problem.



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