Exception MDSLockedSessionManager already registered. Can't register more than one.

I've migrated my application from 11.1.2.1 to 12.1.2 using JDev 12c.
I can deploy it to my standalone weblogic without problem.
But when I access it I get exception:
java.lang.Exception: MDSLockedSessionManager already registered. Can't register more than one.
        at oracle.adf.share.mds.MDSTransManager.registerMDSLockedSessionManagerInst(MDSTransManager.java:131)
        at oracle.adf.share.mds.MDSTransManager.registerMDSLockedSessionManager(MDSTransManager.java:123)
The stack trace starts in my custom filter:
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException,ServletException {
            chain.doFilter(request, response);
What do I wrong?
Thanks,
Lukas

Check all meta data in any descriptors. I bet there is a duplicate entry in one of them (e.g. weblogic-application.xml)...
Timo

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"Frank LaRosa" <[email protected]> wrote in message
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