Microsoft KB Archive/171181

= Deadlock in TCP/IP on Multiprocessor Computers =

Article ID: 171181

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q171181



SYMPTOMS
Under stressful conditions in Windows NT 4.0, TCP/IP may cause a deadlock on a multiprocessor computer, putting the computer into a non-usable state.



CAUSE
This problem happens because the thread on one processor has already allocated a tcb_lock and then the calling function tries to lock the TCBTableLock. Then, on the second processor the thread has a lock on the TCBTableLock and the calling function tries to get a tcb_lock.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Keywords: kbhotfixserver kbqfe kbbug kbfix KB171181

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