After installing J2EE agent 2.2 on Tomcat 5.5, the Tomcat server will not start "NoClassDefFoundError" (Doc ID 1209663.1)

Last updated on SEPTEMBER 21, 2016

Applies to:

Oracle OpenSSO - Version: 7.0 to 8.0.2 - Release: 7.0 to 8.0
Information in this document applies to any platform.

Symptoms

Tomcat's catalina log will report the following when Tomcat will not start after installation of the J2EE agent on Tomcat:

org.apache.tomcat.util.digester.Digester startElement
SEVERE: Begin event threw error
java.lang.NoClassDefFoundError: org/apache/commons/modeler/BaseModelMBean
at java.lang.ClassLoader.defineClass1(Native Method)
...

The stack trace continues, but the key identifier of this problem is the "NoClassDefFoundError" line.

Changes

  Triggers:
  Install J2EE agent for Tomcat 5.5

Cause

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