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Getting a Blank Page and java.lang.ClassCastException Error in the Logs After Redeploying a WebCenter Portal Application with Content Presenter (Doc ID 1664144.1)

Last updated on MARCH 15, 2019

Applies to:

Oracle WebCenter Portal - Version to [Release 11g]
Information in this document applies to any platform.


WebCenter Portal applications with Content Presenter configured with Coherence comes up with a blank page after redeploying the application.

Refreshing the browser brings the page.
However the Content Presenter is not displayed.
The managed server log will show the following error:

<ContentTypeFetchAndCacheListener> <contextInitialized> Exception occurred when initializing content type cache in ContentTypeFetchAndCacheListener.
java.lang.ClassCastException: oracle.webcenter.content.integration.ContentType
    at oracle.webcenter.content.integration.spi.ucm.UCMCacheHelper.getContentType(
    at oracle.webcenter.content.integration.spi.ucm.factory.ContentTypeFactory.getMinimalContentTypes(
    at oracle.webcenter.content.integration.spi.ucm.factory.ContentTypeFactory.ensureAllContentTypesLoaded(
    at oracle.webcenter.content.integration.spi.ucm.factory.ContentTypeFactory.<init>(
    at oracle.webcenter.content.integration.spi.ucm.factory.ContentTypeFactory.getInstance(
    at oracle.webcenter.content.integration.spi.ucm.ContentTypeFetchAndCacheListener.contextInitialized(
    at weblogic.servlet.internal.EventsManager$
    at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(
    at weblogic.servlet.internal.WebAppServletContext.preloadResources(

This happens only when having the following 2 patches applied:

Without Patch 17292891 the issue doesn't reproduce.

The issue is cleared doing any of the following:



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