The Managed Metadata Service or Connection is currently not available

http://social.technet.microsoft.com/Forums/sharepoint/en-US/f16be79d-195d-4bef-809f-69c072508a92/the-managed-metadata-service-or-connection-is-currently-not-available-the-application-pool-or


http://blogs.msdn.com/b/allenwang/archive/2011/03/22/the-managed-metadata-or-connection-is-currently-not-available.aspx