Internal Server Error after OAM ,WNA and EBS integration

(Doc ID 1597233.1)

Last updated on APRIL 21, 2017

Applies to:

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


On : version, Oracle Access Manager

When attempting to log into E-Business Suite instance that has been integrated with OAM11g SSO and Windows Native Authentication { WNA },
the following error occurs.

HTTP 500 Internal Server Error
The website cannot display the page.

EBS accessgate Log -  

Servlet failed with Exception
java.lang.IllegalStateException: Cannot forward a response that is already committed
       at weblogic.servlet.internal.RequestDispatcherImpl.forward(
       at oracle.apps.fnd.ext.sso.FndSsoFilter.doFilter(Unknown Source)
       at weblogic.servlet.internal.FilterChainImpl.doFilter(
       at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(
       at weblogic.servlet.internal.WebAppServletContext$
       at weblogic.servlet.internal.WebAppServletContext.securedExecute(
       at weblogic.servlet.internal.WebAppServletContext.execute(

The issue can be reproduced at will with the following steps:

1. Access EBS
2. As WNA is configured automatic login happen and OAM cookie is set.
3. Redirect to EBS and this result is  error - HTTP/1.1 500 Internal Server Error
4. Access simple protected page works fine.


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