Article ID: 831896
Article Last Modified on 10/26/2005
APPLIES TO
- Microsoft Host Integration Server 2000 Standard Edition
- Microsoft Host Integration Server 2000 Service Pack 1
- 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
- Microsoft SNA Server 4.0 Service Pack 4
SYMPTOMS
When the Microsoft SNA Server service (Snaservr.exe) processes an Advanced Program-to-Program Communication (APPC) single sign-on (SSO) request, you may experience the following symptoms:
- The SNA Server service terminates unexpectedly.
- You receive an Access Violation error message in the supusrpd_wrk() function.
- If the Drwtsn32.exe file is configured as the default Windows debugger, a Drwtsn32.log entry is also created.
The following event is logged in the application event log when the access violation occurs:
Event ID: 624 Source: SNA Server Description: Creating dump file <path>\snadump.log for Snaserver.exe
The following is an example of a Drwtsn32.log entry that may be created (note the function names) when this problem occurs:
Application exception occurred:
App: exe\snaservr.dbg (pid=<process ID>)
When: <date> @ <time>
Exception number: c0000005 (access violation)
function: supusrpd_wrk
0109de46 8bc1 mov eax,ecx
0109de48 8d742434 lea esi,[esp+0x34] ss:01bee92b=????????
0109de4c c1e902 shr ecx,0x2
0109de4f f3a5 rep movsd ds:00c4ff60=40404040 es:002cb428=f0f24040
0109de51 8bc8 mov ecx,eax
0109de53 83e103 and ecx,0x3
0109de56 f3a4 rep movsb ds:00c4ff60=40 es:002cb428=40
0109de58 0fbf4b0c movsx ecx,word ptr [ebx+0xc] ds:0125b677=0000
0109de5c 90 nop
0109de5d 8b148d9c0a1601 ds:00000000=???????? mov edx,[s1rcb+0xe25c (01160a9c)+ecx*4]
FAULT ->0109de64 668b4210 mov ax,[edx+0x10] ds:00f9ea07=????
0109de68 662d993a sub ax,0x3a99
0109de6c 0fbff0 movsx esi,ax
0109de6f 8b04b520531301 ds:00c4ff60=40404040 mov eax,[s1lu62x (01135320)+esi*4]
0109de76 80784401 cmp byte ptr [eax+0x44],0x1 ds:00f9ea0e=??
0109de7a 0f8587000000 jne supusrpd_wrk+0x927 (0109df07)
0109de80 8b0d38120001 ds:01001238=6020fcfc mov ecx,[_imp____dwEnabledTraces (01001238)]
0109de86 f60104 test byte ptr [ecx],0x4 ds:00000000=??
0109de89 742a jz supusrpd_wrk+0x8d5 (0109deb5)
0109de8b 6a04 push 0x4
0109de8d 6878b70d01 push 0x10db778
0109de92 68cc030000 push 0x3cc
*----> Stack Back Trace <----*
FramePtr ReturnAd Param#1 Param#2 Param#3 Param#4 Function Name
00000008 00000000 00000000 00000000 00000000 00000000 snaservr!supusrpd_wrk (FPO: [EBP 0x00000000] [0,15,4])
00000010 00000000 00000000 00000000 00000000 00000000 snaservr!<nosymbols>
CAUSE
The access violation occurs when an APPC session is terminated while the host security DLL (Snasii.dll) processes a single sign-on request. When an APPC session is terminated, the SNA Server service releases the internal session control block that was used for the APPC session. The access violation occurs when the host security DLL tries to access the session control block that has been released.
RESOLUTION
SNA Server 4.0
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
--------------------------------------------------------
13-Nov-2003 19:02 4.0.0.608 468,864 Snaservr.exe
13-Nov-2003 19:02 4.0.0.608 936,368 Trcservr.exe
Note Because of file dependencies, the most recent fix that contains the previous files may also contain additional files.
Host Integration Server 2000
Service pack information
To resolve this problem, obtain the latest service pack for Microsoft Host Integration Server 2000. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
328152 How to obtain the latest service pack for Host Integration Server 2000
Hotfix information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Date Time Version Size File name
------------------------------------------------------
13-Nov-2003 19:25 5.0.0.954 471,312 Snaservr.exe
13-Nov-2003 19:25 5.0.0.954 1,061,136 Trcservr.exe
Note Because of file dependencies, the most recent fix that contains the previous files may also contain additional files.
STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
This problem was corrected in Microsoft Host Integration Server 2000 Service Pack 2.
Keywords: kbbug kbfix kbqfe kbhotfixserver KB831896
