After creating or modifying a URL mapping in a virtual portal, users may no longer be able to access the virtual portal via browser, and administrators may no longer be able to successfully administer the virtual portal via XMLAccess. Such issue has been confirmed by IBM Support as a defect and reported via APAR PM47138. If you are using virtual portals in your environment, Support highly recommends installing cumulative fix (CF) 9 for WebSphere Portal 188.8.131.52 in order to prevent this problem scenario. For those users who already experience such an issue, there are two options for recovery:
1) Restore the Portal database from backup.
2) Open a PMR with IBM Support to request assistance in remapping the URL context to the virtual portal. Upon opening such PMR, the following database tables from database domain "release" should be provided for review by Support:
Note 1: The defect can manifest itself such that when you log into a virtual portal and navigate to the URL mapping portlet, you are unable to see the context root for your virtual portal. Thus, you are unable to create any URL mappings for the virtual portal via the UI since they need to be created as children of the context root. Any URL mappings you do try to create in this case get created as additional context roots and cause undesired results (e.g. redirecting to base portal) if you attempt to utilize them.
Note 2: A flash technote will be published today communicating this same information.