When I start or restart the tomcat5 service, why does the tomcat service crash with errors about java.lang.NoClassDefFoundError, Digester, and Bootstrap.java?

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Release Found: Red Hat Application Server, Tomcat 5 package

Symptom:

When you start or restart the tomcat5 service, the tomcat service crashes with the following error in /var/log/tomcat5/catalina.out:

java.lang.NoClassDefFoundError: org/apache/commons/digester/Digester
       at java.lang.Class.getDeclare...

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