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http://issues.apache.org/bugzilla/show_bug.cgi?id=40252

           Summary: Different commons-logging version in web app preventing
                    tomcat startup
           Product: Tomcat 4
           Version: 4.1.32
          Platform: All
        OS/Version: other
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Catalina
        AssignedTo: tomcat-dev@jakarta.apache.org
        ReportedBy: [EMAIL PROTECTED]


We bundle commons-logging in our webapp, and when we attempt to deploy our app
we get the following error message:

You have more than one version of 'org.apache.commons.logging.Log' visible,
which is not allowed

We wrote some code in our app that attempts to eager-load JCL classes using the
parent classloader if possible.  We didn't see this issue with Tomcat 4.1.31. 
We're using JCL 1.1.  We're distributing a web app that must be portable, so we
can't exclude JCL.  For more info on our approach, see
http://rbodkin.blogs.com/ron_bodkins_blog/2006/07/stupid_log_tric.html

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