Backup programs with multiple threads stop responding when you back up multiple Exchange 2000 applications (327459)


The information in this article applies to:

  • Microsoft Exchange 2000 Server
This article was previously published under Q327459

SYMPTOMS

When you try to back up or restore multiple Exchange 2000 applications (for example, the information store and the Site Replication Service) simultaneously, the backup or restoration may stop responding. This problem may occur if you use a backup or restoration program with multiple threads on an Exchange 2000 server that Microsoft Exchange Site Replication is installed on.

CAUSE

The Exchange 2000 backup application programming interface (API) uses mutexes to control access to shared memory across multiple threads and processes. This problem may occur if the mutex name that is generated is not unique. Both threads try to access the same mutex simultaneously.

RESOLUTION

Cumulative Patch Information

To resolve this problem, obtain the March 2003 Exchange 2000 Server Post-Service Pack 3 (SP3) Rollup. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

813840 March 2003 Exchange 2000 Server post-Service Pack 3 (S813840) rollup

Hotfix Information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Exchange 2000 Server service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question. Component: Backup The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date        Time       Version      Size      File name
   ----------------------------------------------------------
   14-AUG-02   14:34:47   6.0.6313.0   266,240   Eseback2.dll
   14-AUG-02   14:34:47   6.0.6313.0   217,088   Esebcli2.dll
NOTE: Because of file dependencies, this update requires Microsoft Exchange 2000 Server Service Pack 3 (SP3). For more information, click the following article number to view the article in the Microsoft Knowledge Base:

301378 How to obtain the latest Exchange 2000 Server service pack

WORKAROUND

To work around this problem, perform simultaneous backup and restoration operations from separate processes instead.

STATUS

Microsoft has confirmed that this is a problem in Microsoft Exchange 2000 Server.

MORE INFORMATION

After you apply this fix, the Exchange 2000 backup API includes the store type as part of the mutex name to make sure that different store types use different mutexes.
Modification Type:MinorLast Reviewed:1/24/2006
Keywords:kbHotfixServer kbbug kbExchange2000preSP4fix kbfix kbQFE KB327459
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