System state backup fails with Child Process died unexpectedly (4046943)

Backup is system state backups that take VSS snapshots when backing up the registry can fail with errors similar to

Background 2010/11/13 21:16:36 0 System NVSERVER Machine 'NVCLIENT' has gone down
Error 2010/11/13 21:16:36 620 Jobs NVSERVER Child Process died unexpectedly
Error 2010/11/13 21:16:36 620 Jobs NVSERVER Fatal error: Backup Died Unexpectedly
Error 2010/11/13 21:16:36 620 Jobs NVSERVER Job Status: Backup Failed

The problem may also appear as:

Job Message 2010/11/13 21:16:36 620 Data Plugin NVCLIENT Backing up the registry
Error 2010/11/13 21:16:36 620 Jobs NVSERVER Job manager lost message channel unexpectedly

Monitoring CPU usage during backup showed DFS replication using high amounts of CPU. Logging of DFS replication was set on level 4