Assume that you try to use the Managed Metadata Service in Microsoft SharePoint Server 2010, but the service is unavailable. In this situation, SharePoint logs an event. However, when the Managed Metadata Service is restored, SharePoint does not log an event as expected.
To resolve this issue, apply the following hotfix package:
2553037 Description of the SharePoint Server 2010 hotfix package (Osrchwfe-x-none.msp): August 30, 2011
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.