The DFS Replication service has detected an unexpected shutdown on volume %2!S!. This can occur if the service terminated ...

The DFS Replication service has detected an unexpected shutdown on volume %2!S!. This can occur if the service terminated abnormally (due to a power loss, for example) or an error occurred on the volume. The service has automatically initiated a recovery process. The service will rebuild the database if it determines it cannot reliably recover. No user action is required. 
 
Additional Information: 
Volume: %2!S! 
GUID: %1!S!