Microsoft KB Archive/241556

= XADM: OpenMsgStore Function Is Not Thread Safe =

Article ID: 241556

Article Last Modified on 10/26/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q241556





SYMPTOMS
If a program is running multiple threads that both run OpenMsgStore repeatedly, a deadlock may occur after some time.



CAUSE
This issue can occur if a thread (T1) is holding a critical section object (CS1) and is waiting for another critical section (CS2) that is being held by another thread (T2) that is waiting for the critical section (CS1), which leads to a deadlock situation.



RESOLUTION
To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

191014 XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft Exchange Server version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.

Additional query words: MAPI

Keywords: kbhotfixserver kbqfe kbbug kbexchange550presp4fix kbexchange550sp4fix kbfix kbqfe KB241556

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