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XCON: MTA Stops Processing Mail with Events 57, 2051 and 1105

The information in this article applies to:

Microsoft Exchange Server, version 5.5

SYMPTOMS

The Exchange Server Message Transfer agent (MTA) may stop processing mail under a heavy load. It may also generate the following Event id's in the Windows NT Application Event log:

   Event ID: 57
   Source: MSExchangeMTA
   Type: Warning
   Category: X.400 Service
   Description: The limit on the number of associations allowed to and from
   entity /O=MICROSOFT/OU=TEST/CN=CONFIGURATION/CN=SERVERS/CN=TEST
   /CN=MICROSOFT MTA has been reached. The limit is 2032. [MTA MAIN BASE 1
   43] (14)

   Event ID: 2051
   Source: MSExchangeMTA
   Type: Error
   Category: Internal processing
   Description: A fatal internal MTA error has occurred. The internal
   directory replication agent (DRA) Dispatcher thread did not execute. If
   this message is logged more that 5 times restart the directory. Contact
   Microsoft Technical Support. An illegal GET from element 00000000
   occurred at offset 1. [BASE OPERATOR 18 110] (16)

   Event ID: 1105
   Source: MSExchangeDS
   Type: Error
   Category: Replication
   Description: The internal directory replication agent (DRA) Dispatcher
   thread did not execute. If this message is logged more that 5 times
   restart the directory.

RESOLUTION

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

The English version of this fix should have the following file attributes or later:

Component: Message Transfer Agent (MTA)

   File Name      Version
   -------------------------
   Dbserver.sch   5.5.2448.1
   Dcprods.cat    5.5.2448.1
   Ems_rid.dll    5.5.2448.1
   Emsmta.exe     5.5.2448.1
   Info4log.cfg   5.5.2448.1
   Infodlog.cfg   5.5.2448.1
   Infollog.cfg   5.5.2448.1
   Infotlog.cfg   5.5.2448.1
   Mtacheck.exe   5.5.2448.1
   Mtamsg.dll     5.5.2448.1
   P2.xv2         5.5.2448.1
   X400om.dll     5.5.2448.1
   X400omv1.dll   5.5.2448.1

STATUS

Microsoft has confirmed this to be a problem in Microsoft Exchange Server version 5.5.

Keywords          : exc55sp2fix 
Version           : WinNT:5.5
Platform          : winnt 
Issue type        : kbbug