Microsoft KB Archive/260413

= Logoff May Not Finish If User Profile Is Stored on AS/400 with Max MPX Requests Set to 1 =

Article ID: 260413

Article Last Modified on 11/1/2006

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APPLIES TO


 * 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 Q260413



SYMPTOMS
When you log off, the logoff process begins but may stop responding (hang). When this occurs, the client workstation is fully accessible from the network; you can access the workstation by using the ping or net use command. However, pressing CTRL+ALT+DELETE on the workstation does not display the Security dialog box. You must reboot the workstation to log on again.



CAUSE
This behavior can occur if the user profiles are stored on an AS/400 system (which is a Server Message Block, or SMB, server), and the MAXMUX value is set to 1 on the AS/400 SMB server. In Windows NT, the MAXMUX value is listed as the Max MPX Requests setting. The workstation's redirector is blocked from running several threads until a resource that is currently in a deadlocked state is released. This may be the result of a race condition among several threads.



RESOLUTION
Increase the value on the server to a higher number, or possibly slow down the workstation's redirector to avoid the race condition.

Keywords: kbenv kbprb KB260413

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