Microsoft KB Archive/216765

= TCP/IP Experiences STOP 0x7F Under Heavy Load =

Article ID: 216765

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Workstation 3.51

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This article was previously published under Q216765



SYMPTOMS
Under high load, a server may experience the following STOP error message:

0x7F (UNEXPECTED_KERNEL_MODE_TRAP): 0x0000007f (0x00000008, 0x00000000, 0x00000000, 0x00000000)

The first parameter, 0x08, indicates that this is a double-fault.



CAUSE
For deferred processing, TCP/IP is calling a function recursively. Under high load, this recursion can cause a stack overflow.



RESOLUTION
A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression tested and should be applied only to systems experiencing this specific problem.

To resolve this problem immediately, download the fix as described below. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:

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

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

  Date      Time                 Size    File Name     Platform -  02/04/99  09:52p               124,080 Tcpip.sys     (x86) 02/04/99 09:54p               217,328 Tcpip.sys     (Alpha)



STATUS
Microsoft has confirmed that this is a problem in Windows NT 3.51.

Additional query words: 3.51

Keywords: kbbug kbfix kbqfe KB216765

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