DOCUMENT:Q197398  28-APR-1999  [exchange]
TITLE   :XCON: MTA Stops Processing Mail with Events 57, 2051 and 1105
PRODUCT :Microsoft Exchange
PROD/VER:WinNT:5.5
OPER/SYS:
KEYWORDS:exc55sp2fix

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The information in this article applies to:

 - Microsoft Exchange Server, version 5.5 
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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 
Technology        : kbExchangeSearch kbExchange550 kbZNotKeyword2
Version           : WinNT:5.5
Issue type        : kbbug
Solution Type     : kbfix

=============================================================================

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