SLI_SEND Fails To Complete, Causing Win32 SLI App To Hang

• Microsoft SNA Server, versions 3.0, 3.0 SP1
  on the following platforms: NT

SYMPTOMS

A Win32 SLI application may hang waiting for an SLI_SEND to complete. This may occur if the host has sent an UNBIND on the session, which causes the SLI library to issue an RUI_TERM.

MORE INFORMATION

A client side trace will show the following data flow:

   ---------------------------------------------- 08:18:08.05
   SLI_RECEIVE request
   ---------------------------------------------- 08:18:08.06
   RUI_READ response
   OK - OK
   (Unbind received on this response)
   ---------------------------------------------- 08:18:08.06
   RUI_READ request
   ---------------------------------------------- 08:18:08.06
   SLI_RECEIVE response
   OK - OK
   (client receives message signoff is successful in data flow)
   ---------------------------------------------- 08:18:08.06
   SLI_SEND request
   ---------------------------------------------- 08:18:08.06
   RUI_TERM request
   ---------------------------------------------- 08:18:08.07
   RUI_WRITE request
   ---------------------------------------------- 08:18:08.07
   RUI_WRITE response
   CANCELLED - TERMINATED
   ---------------------------------------------- 08:18:08.08
   SLI_SEND response
   IN_PROGRESS - OK
   ---------------------------------------------- 08:18:08.08
   RUI_READ response
   CANCELLED - TERMINATED
   ---------------------------------------------- 08:18:08.08
   RUI_READ response
   CANCELLED - TERMINATED
   ---------------------------------------------- 08:18:08.08
   RUI_READ response
   CANCELLED - TERMINATED
   ---------------------------------------------- 08:18:08.08
   RUI_TERM response
   OK - OK
   ---------------------------------------------- 08:18:08.09
   SLI_BID post
   SESSION_FAILURE - 00000055 

CAUSE

SNA Server's Winsli32.dll does not return the SLI_SEND Post response to the SLI application after an RUI_TERM is sent and this causes the application to hang.

RESOLUTION

Microsoft has updated Winsli32.dll so that it returns all outstanding SLI verbs to the application when a session fails.

STATUS

Microsoft has confirmed this to be a problem in SNA Server version 3.0 and 3.0sp1. This problem was corrected in the latest SNA Server version 3.0 U.S. Service Pack. For information on obtaining this Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words: sli hang

Keywords : prodsna snalua kbbug3.00 snaprog kbbug3.00.sp1 kbfix3.00.sp2
Version : WINDOWS:3.0,3.0 SP1
Platform : WINDOWS
Issue type :