If you login as guest, go to preferences, reset the guest layout to the default layout then at first you cannot see preferences for guest. Then if you restart Tomcat, you cannot even get into uPortal at all (you see the error below).

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 uPortal Error

Sorry, but uPortal encountered an error that is preventing it from rendering. The error must be corrected by system administrators. Try again later.

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and in the logs there is a message that I could not find a whole lot of information about how to fix:


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ERROR [http-8080-Processor24] portal.ExceptionHelper.[] May/05 08:01:15 - Programming error
org.jasig.portal.PortalException: Unable to instantiate a "org.jasig.portal.layout.dlm.DistributedLayoutManager"
      at org.jasig.portal.layout.UserLayoutManagerFactory.getUserLayoutManager(UserLayoutManagerFactory.java:66)
      at org.jasig.portal.GuestUserPreferencesManager.registerSession(GuestUserPreferencesManager.java:172)
      at org.jasig.portal.GuestUserInstance.registerSession(GuestUserInstance.java:68)
      at org.jasig.portal.UserInstanceManager.getUserInstance(UserInstanceManager.java:70)
      at org.jasig.portal.PortalSessionManager.doGet(PortalSessionManager.java:246)
Caused by: java.lang.reflect.InvocationTargetException
      at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
      at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
      at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
      at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
      at org.jasig.portal.layout.UserLayoutManagerFactory.getUserLayoutManager(UserLayoutManagerFactory.java:57)
      ... 20 more
Caused by: org.jasig.portal.PortalException: Unable to instantiate DistributedLayoutManager for guest.
      at org.jasig.portal.layout.dlm.DistributedLayoutManager.<init>(DistributedLayoutManager.java:159)
      ... 25 more
Caused by: org.jasig.portal.PortalException: Exception encountered while reading a layout for userId=1, profileId=1
      at org.jasig.portal.layout.dlm.DistributedLayoutManager.loadUserLayout(DistributedLayoutManager.java:246)
      at org.jasig.portal.layout.dlm.DistributedLayoutManager.<init>(DistributedLayoutManager.java:100)
      ... 25 more
Caused by: java.lang.Exception: RDBMUserLayoutStore::getUserLayout(): No INIT_STRUCT_ID in UP_USER_LAYOUT for 0 and LAYOUT_ID 1
      at org.jasig.portal.layout.simple.RDBMUserLayoutStore.getUserLayout(RDBMUserLayoutStore.java:1651)
      at org.jasig.portal.layout.dlm.RDBMDistributedLayoutStore._safeGetUserLayout(RDBMDistributedLayoutStore.java:491)
      at org.jasig.portal.layout.dlm.RDBMDistributedLayoutStore.getCompositeLayout(RDBMDistributedLayoutStore.java:708)
      at org.jasig.portal.layout.dlm.RDBMDistributedLayoutStore._getUserLayout(RDBMDistributedLayoutStore.java:558)
      at org.jasig.portal.layout.dlm.RDBMDistributedLayoutStore.getUserLayout(RDBMDistributedLayoutStore.java:465)
      at org.jasig.portal.layout.dlm.DistributedLayoutManager.loadUserLayout(DistributedLayoutManager.java:244)
      ... 26 more

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