Article ID: 173882 - Last Review: February 23, 2007 - Revision: 2.2

Netlogon Synchronization Errors

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This article was previously published under Q173882

SUMMARY

Netlogon creates many errors that are recorded in the event log, which eventually fills or wraps the log.

The Netlogon.chg file is located on all domain controllers, but is used only by the primary domain controller (PDC) to keep track of changes made to the security databases. All changes to the security databases are recorded in this log file, along with the serial number of the change. Each of the three security databases maintains a separate serial number, which is incremented once for each change. When a backup domain controller (BDC) requests a particular change from the PDC, the PDC checks the change log to determine which changes need to be sent.

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Specific Events and Errors

The following events may be recorded on the BDC:

Event ID: 5717
Source: NETLOGON
Type: Information
The full synchronization replication of the LSA database from the primary domain controller \\<DOMAIN CONTROLLER> completed successfully.

Event ID: 5716
Source: NETLOGON
Type: Warning
The partial synchronization replication of the SAM database from the primary domain controller <DOMAIN CONTROLLER> failed with the following error:

<THERE IS NO ERROR REPORTED>

The Data section contains c0000134 (Words) or 34 01 00 c0 (Bytes.); the c0000134 indicates STATUS_SYNCHRONIZATION_REQUIRED.

The following events may be reported on the PDC:

Event ID: 5713
Source: NETLOGON
Type: Information
The full synchronization request from the server <SERVERNAME> completed successfully. <X> object(s) has(have) been returned to the caller.

Event ID: 5712
Source: NETLOGON
Type: Warning
The partial synchronization request from the server <SERVERNAME> failed with the following error:

<THERE IS NO ERROR REPORTED>

Trying to promote a BDC to a PDC may cause the following pop-up window message to stay on the screen indefinitely:

"Synchronizing <BDC> with its primary"

The following event log error may be generated:

Event ID: 5705
Source: NETLOGON
Type: Error
The change log cache maintained by the Netlogon Service for database changes is corrupted. The Netlogon service is resetting the change log.

These events can be caused when Windows NT fails to update the %SystemRoot%\Netlogon.chg file on the PDC. This may occur for any of the following reasons:

The Read-Only attribute could be set.
The netlogon.chg file could be corrupted.
The permissions for the system account could be insufficient for that file; they should be at least RWXD.

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Resolving the Problem

If the Netlogon.chg file has been corrupted, you may need to delete or rename the file. However, this file is always in use by the system.

To delete (reset) the Netlogon.chg file on a FAT partition, use the following steps:

Start the system using MS-DOS, and then delete the %SystemRoot%\Netlogon.chg file.
Restart using Windows NT. The file will be recreated at startup.

To delete (reset) the Netlogon.chg file on an NTFS partition, use the steps for Windows 2000 or for Windows NT 4, depending on the product that you have installed.

Windows 2000

Open Windows Explorer, and then navigate to the %systemroot% folder.
Right-click the Netlogon.chg file, and then click Properties.
Click the Security tab.
Click to clear the Allow inheritable permissions from parent to propagate to this object check box, and then click OK.
In the Security dialog box, click Copy to copy the existing inheritable permissions to this object.
Click the System account, click Deny - Full Control to change all of the permissions to Deny, and then click OK.
Restart the computer. After you log on to the computer, delete the Netlogon.chg file.
Restart the computer again. When you log on the computer, the Netlogon.chg file is rebuilt automatically.

Windows NT 4

Open Windows Explorer, and then navigate to the %systemroot% folder.
Right-click the Netlogon.chg file, and then click Properties.
Click the Security tab.
Click Add and add the account that you are currently logged in as with full control.
Remove the rest of the users from the permission list, then click OK.
Restart the computer. After you log on to the computer, delete the Netlogon.chg file.
Restart the computer again. When you log on the computer, the Netlogon.chg file is rebuilt automatically.

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