Velocity plugin modules can throw errors due to incompatibilities with Confluence (see error below). This should be handled more gracefully by disabling the module rather than toppling Confluence over.

@40000000487ec61b1e0ddaf4 2008-07-16 23:09:53,499 ERROR [http-load-node1-tomcat.atlassian.com%2F63.246.3.41-8080-Processor25] [atlassian.xwork.interceptors.XWorkTransactionInterceptor] onThrowable Invoking rollback for transaction on action '/dashboard.action (DashboardAction.execute())' due to throwable: java.lang.NoClassDefFoundError: com/atlassian/confluence/renderer/WikiStyleRenderer
@40000000487ec61b1e0df264 – url: /confluence/dashboard.action | userName: anonymous
@40000000487ec61b1e0df64c java.lang.NoClassDefFoundError: com/atlassian/confluence/renderer/WikiStyleRenderer
@40000000487ec61b1e0f0f8c at java.lang.Class.getDeclaredMethods0(Native Method)
@40000000487ec61b1e0f1374 at java.lang.Class.privateGetDeclaredMethods(Class.java:2427)
@40000000487ec61b1e0f175c at java.lang.Class.getDeclaredMethods(Class.java:1791)
@40000000487ec61b1e0f1f2c at java.beans.Introspector$1.run(Introspector.java:1272)
@40000000487ec61b1e0f2314 at java.security.AccessController.doPrivileged(Native Method)
@40000000487ec61b1e0f3a84 at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1270)
@40000000487ec61b1e0f3e6c at java.beans.Introspector.getTargetMethodInfo(Introspector.java:1136)
@40000000487ec61b1e0f4254 at java.beans.Introspector.getBeanInfo(Introspector.java:387)
@40000000487ec61b1e0f4a24 at java.beans.Introspector.getBeanInfo(Introspector.java:159)
@40000000487ec61b1e0f7134 at org.springframework.beans.CachedIntrospectionResults.<init>(CachedIntrospectionResults.java:244)
@40000000487ec61b1e0f751c at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:143)
@40000000487ec61b1e0f7cec at org.springframework.beans.BeanWrapperImpl.setIntrospectionClass(BeanWrapperImpl.java:236)
@40000000487ec61b1e0f84bc at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:194)
@40000000487ec61b1e0f945c at org.springframework.beans.BeanWrapperImpl.setWrappedInstance(BeanWrapperImpl.java:177)
@40000000487ec61b1e0f9c2c at org.springframework.beans.BeanWrapperImpl.<init>(BeanWrapperImpl.java:130)
@40000000487ec61b1e0fa014 at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowire(AbstractAutowireCapableBeanFactory.java:260)
@40000000487ec61b1e0fa7e4 at com.atlassian.spring.container.SpringContainerContext.createComponent(SpringContainerContext.java:85)
@40000000487ec61b1e0fcef4 at com.atlassian.confluence.plugin.ConfluencePluginUtils.instantiatePluginModule(ConfluencePluginUtils.java:42)
@40000000487ec61b1e0fd6c4 at com.atlassian.confluence.plugin.descriptor.VelocityContextItemModuleDescriptor.createModule(VelocityContextItemModuleDescriptor.java:46)
@40000000487ec61b1e0ff9ec at com.atlassian.confluence.plugin.descriptor.VelocityContextItemModuleDescriptor.getModule(VelocityContextItemModuleDescriptor.java:39)
@40000000487ec61b1e1001bc at com.atlassian.confluence.setup.webwork.ConfluenceVelocityContext.addContainerComponents(ConfluenceVelocityContext.java:138)
@40000000487ec61b1e10098c at com.atlassian.confluence.setup.webwork.ConfluenceVelocityContext.addSpringComponentsIfSetupComplete(ConfluenceVelocityContext.java:109)
@40000000487ec61b1e101d14 at com.atlassian.confluence.setup.webwork.ConfluenceVelocityContext.<init>(ConfluenceVelocityContext.java:80)
@40000000487ec61b1e1024e4 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
@40000000487ec61b1e1028cc at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
@40000000487ec61b1e103c54 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
@40000000487ec61b1e10403c at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
@40000000487ec61b1e10480c at java.lang.Class.newInstance0(Class.java:355)
@40000000487ec61b1e104bf4 at java.lang.Class.newInstance(Class.java:308)
@40000000487ec61b1e106b34 at com.opensymphony.xwork.ObjectFactory.buildBean(ObjectFactory.java:86)
@40000000487ec61b1e107304 at com.opensymphony.webwork.views.velocity.VelocityManager.init(VelocityManager.java:275)
@40000000487ec61b1e1076ec at com.opensymphony.webwork.views.velocity.VelocityManager.<init>(VelocityManager.java:66)
@40000000487ec61b1e107ebc at com.opensymphony.webwork.views.velocity.VelocityManager.getInstance(VelocityManager.java:91)