Microsoft KB Archive/216793

= DHCP server stops leasing addresses if a sharing violation occurs =

Article ID: 216793

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q216793



SYMPTOMS
The DHCP service stops responding to client lease and renewal requests. The following errors are logged to the System and Application logs.

System log
Event ID: 1014

Source: DHCP Server

Description: The JET Database returned the following error: -510

Data: 02 fe ff ff

Event ID: 1016

Source: DHCP Server

Description: The DHCP Server encountered the following error when backing up the user database:

Data: 2d 4e 00 00

Application log
Event ID: 30

Source: JET

Description : Unable to create log. The drive may be read-only or out of disk space. Error - 1032

The error in the Application log appears only once when the sharing violation occurs. The errors in the System log are repeated every time the DHCP service tries to backup its database. By default, this attempt occurs every 15 minutes.



CAUSE
The DHCP service uses a JET database to store configuration and lease information. The service creates a backup copy of its database at a regular interval. Any program or service other than the DHCP service gaining access to the files in the DHCP directory may cause a sharing violation. As a result of the sharing violation, the DHCP service stops processing all client requests because it requires exclusive access to its database and log files.



Windows NT Server or Workstation 4.0
To resolve this problem, obtain the latest service pack for Windows NT 4.0. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to obtain the latest Windows NT 4.0 service pack

Windows NT Server 4.0, Terminal Server Edition
To resolve this problem, obtain the latest service pack for Windows NT Server 4.0, Terminal Server Edition. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



WORKAROUND
The DHCP service should be the only process that gains access to the files in the DHCP directory. In addition to applying the update described in this article, the following procedural or configuration changes should be made.

If a backup of the Windows NT system files is required, the DHCP service should be stopped until the backup is complete. If the system is running a virus scanner, the directory containing the DHCP files should be omitted from those being scanned (%systemroot%\system32\dhcp).



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. This problem was first corrected in Windows NT Server 4.0, Terminal Server Edition Service Pack 6.

Keywords: kbhotfixserver kbbug kbfix kbqfe KB216793

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