Microsoft KB Archive/195971

= XADM: Deadlock in STORE Due to a Stack Overflow =

Article ID: 195971

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition
 * Microsoft Exchange Server 5.0 Standard Edition

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This article was previously published under Q195971





SYMPTOMS
The Microsoft Exchange information store may stop responding (hang) because of a stack overflow when processing a corrupted message. After this happens, the client cannot log on to the Exchange Server computer and cannot send or receive a message.



CAUSE
This happens because the message contains a corrupted attachment, in this case, there is no "END" section for the encoded attachment. When the information store encounters an incomplete sequence at the end of the encoded line, it keeps appending more data, but makes no progress with decoding.



Exchange Server 5.5
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:

191014 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: Information Store

Exchange Server 5.0
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next version of Exchange Server 5.0 that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

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

Component: Information Store



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Serverversions 5.0 and 5.5.

Additional query words: QFE UUENCODE

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB195971

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