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XADM: Backup Stops Because of Communications Error

The information in this article applies to:

Microsoft Exchange Server, versions 4.0, 5.0, 5.5

SYMPTOMS

Backup stops because of a communications error.

CAUSE

When backing up to NULL or buffering the read bytes from HRBackupRead, the client and server may stop responding (hang) while waiting on each other. A communications error will be produced, causing the backup to be halted.

This problem is seen more often in single processor environments than in multi-processor environments.

RESOLUTION

Exchange Server 4.0

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression-tested and should be applied only to computers experiencing this specific problem. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft Exchange Server version 4.0 service pack that contains this fix.

For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

Exchange Server 5.0

A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression-tested and should be applied only to computers experiencing this specific problem. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. If you are not severely impacted by this specific problem, Microsoft recommends that you wait for the next Microsoft Exchange Server version 5.0 service pack that contains this fix.

For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

http://www.microsoft.com/support/supportnet/overview/overview.asp

Exchange Server 5.5

To resolve this problem, obtain the latest service pack for Exchange Server version 5.5. For more information, please see the following article in the Microsoft Knowledge Base:

Q191014 XGEN: How to Obtain the Latest Exchange Server 5.5 Service Pack

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server versions 4.0, 5.0, and 5.5.

Keywords          : exc55sp2fix 
Version           : WinNT:4.0,5.0,5.5
Platform          : winnt 
Issue type        : kbbug