XADM: MSExchangeMTA Errors When Many Connections Are Open

 Last reviewed: April 21, 1997
Article ID: Q140976
The Information in this article applies to:
  • 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 version 4.0. This problem was corrected in the latest Microsoft Exchange Server U.S. Service Pack. 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

Additional query words:
Keywords : kbbug4.00 kbother XADM
Version : 4.0
Platform : WINDOWS
Issue type : kberrmsg

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Last reviewed: April 21, 1997
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