XADM: MSExchangeMTA Errors When Many Connections Are Open

• Microsoft Exchange Server, version 4.0

SYMPTOMS

The Microsoft Exchange Message Transfer Agent (MTA) fails to send messages when it needs to connect to a large number of other MTAs. The following message appears in the Windows NT Event Log:

   Event ID:     1023
   Source:       MSExchangeMTA
   Type:         Warning
   Category:     Configuration
   Description:  Unable to start the association due to a resource
                 shortage. There are no available Kernel Control Blocks.
                 [PLATFORM MAIN BASE 1 32] (14) 

MORE INFORMATION

When Microsoft Exchange Link Monitors are in use, there is an increased chance of seeing this problem because they produce a large number of concurrent connections.

This problem will occur in an environment where there are lots of MTA's, in other words, in a large Organization or a large Site.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 4.0. This problem was corrected in Microsoft Exchange Server 4.0 U.S. Service Pack 2. 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          : kbother kbbug4.00 XADM 
Version           : 4.0
Platform          : WINDOWS 
Issue type        : 

Last Reviewed: March 11, 1999