SharePoint Error : The Managed Metadata Service or Connection is currently not available. The Application Pool or Managed Metadata Web Service may not have been started.

http://blogs.msdn.com/b/guruketepalli/archive/2013/08/09/sharepoint-error-the-managed-metadata-service-or-connection-is-currently-not-available-the-application-pool-or-managed-metadata-web-service-may-not-have-been-started-please-contact-your-administrator.aspx