It seems that there are some missing classes such as:
(Could not find SearchFederated under 2.6.2 while it is found under 2.6.1)
10:51:54,147 ERROR [[/portal-admin]] org/jboss/portal/bridge/JBossServletContextProvider
SearchFederated is not something to use, as mentionned it is alpha work, the class has been moved/renamed or deleted.
It looks like you were using a bridged application.
The class moved from: