XADM: Information Store Hangs as Thread CPU Utilization Drops to 0%

• Microsoft Exchange Server, version 5.5

SYMPTOMS

The information store appears to stop responding (hang) frequently, for short periods of time (most periods not exceeding 5-10 minutes).

CAUSE

The information store queries the directory on a particular public folder to determine permissions on that folder. The directory is using an inefficient search filter for this operation and, combined with the context the store is using to call into the directory, the store threads eventually block until the initial read is completed.

The problem is aggravated (to the extent you see a hang) by the fact that a user in the access control list (ACL) for the public folder is a member of a large number of distribution lists (DLs).

RESOLUTION

A change was made to the ds_search call to use a better filter.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5. This problem has been corrected in the latest U.S. service pack for Microsoft Exchange Server version 5.5. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Keywords          : XADM 
Version           : 5.5
Platform          : winnt 
Issue type        : kbbug 

Last Reviewed: April 21, 1999