Microsoft KB Archive/273975

= Opening Multiple SLI Sessions May Cause Some to Stop Responding (Hang) =

Article ID: 273975

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft Host Integration Server 2000 Standard Edition
 * Microsoft SNA Server 4.0
 * Microsoft SNA Server 4.0 Service Pack 1
 * Microsoft SNA Server 4.0 Service Pack 2
 * Microsoft SNA Server 4.0 Service Pack 3

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This article was previously published under Q273975



SYMPTOMS
If a Win32 SNA Server application opens multiple logical unit (LU) sessions at the same time by calling SLI_OPEN, some SLI_OPEN requests may stop responding (hang) and never complete. SNA Application LUA API tracing shows that the underlying RUI_INIT is completed for every SLI_OPEN that was issued, but one or more SLI_OPEN requests may fail to complete.



CAUSE
A timing window within the Winsli32.dll code can result in SLI_OPEN hanging if the RUI_INIT callback happens before the verb returns control.



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

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack



WORKAROUND
Reduce the number of SLI_OPEN requests that are issued at the same time, or serialize all SLI_OPEN requests.



STATUS
Microsoft has confirmed that this is a problem in Microsoft SNA Server versions 4.0, 4.0 SP1, 4.0 SP2, and 4.0 SP3.

This problem was first corrected in SNA Server 4.0 Service Pack 4.

Additional query words: HIS 2000

Keywords: kbbug kbfix kbqfe kbsna400presp4fix kbsna400sp4fix KB273975

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