XCON: MTA Stopping with Event ID 2143: Unrecoverable Error
ID: Q159307
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The information in this article applies to:
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Microsoft Exchange Server, version 4.0
SYMPTOMS
The Microsoft Exchange message transfer agent (MTA) terminates unexpectedly
with an event similar to the following (as viewed in the Application Event
Log):
Event ID: 2143
Source:MSExchangeMTA
Type:Error
Category:Internal Processing
Description:
A fatal MTA database server error was encountered. Call Microsoft
Product Support.
Unrecoverable error: ODXOINIU - Object does not exist. About to
terminate. Called from MTA. Procedure 205. Object ID: 06000072.
Attribute ID: 55. Attribute value number: 1. Referenced object: 00000000
(00000000 => N/A). Referenced object error 0. [1 DB Server XFER-IN 22
101] (16)
The following Application Event Log message may be seen as well:
Event ID: 2186
Source:MSExchangeMTA
Type:Warning
Category:Internal Processing
Description:
An MTA database server error was encountered while locking an object.
Called from MTA. Procedure 100. Database error code: ODXOINIU - Object
does not exist.
Object at fault: 06000072. [DB Server XFER-IN 22 59] (14)
CAUSE
When an MTA object is created, its reference count is initialized to one.
When the object is passed to an entity that can delete the object, the
reference count must first be incremented. When an object deletion is
requested, the reference count is decremented (and when the reference count
for the object reaches zero, the object is physically deleted).
There is a race condition in the MTA, where a newly initialized object
(reference count of one) is passed to an entity (the Microsoft Exchange
Internet Mail Connector) before the reference count is incremented. An
object deletion is requested by the Internet Mail Connector (IMC) (which
decrements the reference count to zero, and causes the object to be
deleted). When the MTA attempts to access the object, the object had
already been deleted and an "ODXOINIU - Object does not exist" complaint is
raised by the MTA.
STATUS
The Microsoft MTA has been modified to ensure that the reference count for
the object is incremented prior to being passed to an entity that could
delete it.
Microsoft has confirmed this to be a problem in Microsoft Exchange version
4.0.
This problem was corrected in the latest Microsoft Exchange 4.0 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:
failure crash deletion spurious ODXOINIU
Keywords : kbusage kbbug4.00 kbfix4.00.sp4 XCON
Version : winnt:4.0
Platform : winnt
Issue type : kbbug