I came across this strange thing today. One of the domain controllers wasn’t picking up new group policies. Basically, there were fewer folders in the policies folder in SYSVOL on that DC than in the others.¬¨‚Ć Looking at the event log, the following was thrown up:
Event Type:    Error
Event Source:    NtFrs
Event Category:    None
Event ID:    13568
Date:        06/06/2008
Time:        12:17:46
User:        N/A
Computer:    GWEN
Description:
The File Replication Service has detected that the replica set “DOMAIN SYSTEM VOLUME (SYSVOL SHARE)” is in JRNL_WRAP_ERROR.
Yes, the server is called Gwen. This is A Story for Another Time.
Restarting the File Replication Service did nothing. Neither did rebooting the server, or disabling file replication and then re-enabling it. Thankfully, though, there is a pretty simple fix.
It turns out that the journal used for the replication service had become corrupt, preventing the replication from happening. What you need to do is force the journal to reinitialise so that it rebuilds the folder again from scratch – not a problem if your other DCs have up-to-date SYSVOL folders. This reinitialisation on Windows Server 2000 is automatic if “jrnl_wrap_error” happens and Server 2000 SP2 is installed, but (curiously) not if SP3 is installed.
You can, however, force a SP3 machine to reinitialise (or, as Microsoft put it, “automatic non-authoritative restore”) the share by modifying the following registry key on the server:
In HKLM\System\CurrentControlSet\Services\Ntfrs\Parameters, change the “Enable journal wrap automatic restore” key to “1”. If it doesn’t exist (it didn’t for me) add it as a DWORD key, value 1.
Then, restart the File Replication Service from Services, and wait! The folder is backed up (the event viewer tells you where), deleted, and then re-synced with other servers.  Hurrah!
Please note that modifying your registry is dangerous and may cause your feet to explode.¬¨‚Ć Or something.¬¨‚Ć Read Microsoft’s help page on this issue, which explains a bit more and provides another possible solution.
