> From: John Holman [mailto:j.g.hol...@qmul.ac.uk]
> Subject: commons-logging problem
>
> When packaged as a war file this combination reliably produces the
> exception shown below in the Tomcat console under the following
> circumstances:

This is likely the result of a fix to prevent PermGen from filling up after 
some number of webapp redeployments.  You can try disabling the newer behavior 
by setting the system property:
  org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES
to false.  Doc is here:
http://tomcat.apache.org/tomcat-5.5-doc/config/systemprops.html#Other

The original bug report is here:
https://issues.apache.org/bugzilla/show_bug.cgi?id=41939

 - Chuck


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