We may face following error when attempt to log to DSUI (https://localhost:9443/CustomerDataStewardshipWeb/) of Physical MDM:

[12/11/15 18:11:04:782 PST] 00000121 WASSessionCor E SessionContext checkSecurity SESN0008E: A user authenticated as anonymous has attempted to access a session owned by user:defaultWIMFileBasedRealm/uid=mdmadmin,o=defaultWIMFileBasedRealm.
[12/11/15 18:11:04:782 PST] 00000121 WASSessionCor E SessionContext checkSecurity SESN0008E: A user authenticated as anonymous has attempted to access a session owned by user:defaultWIMFileBasedRealm/uid=mdmadmin,o=defaultWIMFileBasedRealm.
[12/11/15 18:11:04:783 PST] 00000121 webapp E com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E: [Servlet Error]-[WebExtensionProcessor]: com.ibm.websphere.servlet.session.UnauthorizedSessionRequestException: SESN0008E: A user authenticated as anonymous has attempted to access a session owned by user:defaultWIMFileBasedRealm/uid=mdmadmin,o=defaultWIMFileBasedRealm.
….
[12/11/15 18:11:04:843 PST] 00000121 filter E com.ibm.ws.webcontainer.filter.FilterInstanceWrapper doFilter SRVE8109W: Uncaught exception thrown by filter SessionFilter: java.io.FileNotFoundException: SRVE0190E: File not found: /theme/product.css

You can take following steps to resolve this issue:

1. Override web application session management as below. In our case it is DSUI:
dsui_session_reset
then ..
dsui_session_reset2
2. Stop application server where MDM is deployed (e.g. /opt/IBM/WebSphere/AppServer/profiles/profile1/bin/stopServer.sh server1)
3. Delete the content of following folders:
/wstemp (e.g. /opt/IBM/WebSphere/AppServer/profiles/profile1/wstemp)
/temp (e.g. /opt/IBM/WebSphere/AppServer/profiles/profile1/temp)
4. Start application server (e.g. /opt/IBM/WebSphere/AppServer/profiles/profile1/bin/startServer.sh server1)

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