After the upgrade, It will copy the search-beans.xml from version 10i to 11i package path. Please keep the existing search-beans.xml file so it is not overwritten.
Try to Copy a new search-beans.xml of 11i to 11i package path (located in the directory {IPORTAL_HOME}/iportal/webapps/WEB-INF/config/search/WEB-INF/search-beans.xml))
refer to readme file for upgrade
