Microsoft KB Archive/308998

= Print Server Access Violation in Function MonitorThread =

Article ID: 308998

Article Last Modified on 10/6/2005

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APPLIES TO


 * Microsoft SNA Server 4.0

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This article was previously published under Q308998



SYMPTOMS
The SNA Print service (Snaprint.exe) may fail unexpectedly with an access violation, causing all print sessions to end abnormally when the Request Definite Response option is enabled for 3270 print sessions. When this problem occurs, SNA Server may log the following event:

Event ID: 624

Source: SNA Server

Description: Creating dump file SNADUMP.LOG for snaprint.exe

If Drwtsn32.exe is configured as the default debugger on the system, the Drwtsn32.log file will indicate an access violation fault in function MonitorThread. The log entry will appear similar to the following: Application exception occurred: App: exe\snaprint.dbg (pid=546) When: 9/18/2001 @ 8:44:29.876 Exception number: c0000005 (access violation)

[...]

State Dump for Thread Id 0x5f7

eax=00000001 ebx=0000000a ecx=00000000 edx=6020fcfc esi=00000000 edi=00000000 eip=61c81e51 esp=0faefb04 ebp=602012b0 iopl=0        nv up ei pl nz na pe nc cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000             efl=00000202

function: MonitorThread 61c81e31 8d542418        lea     edx,[esp+0x18]         ss:108ee50b=???????? 61c81e35 51              push    ecx 61c81e36 8b743818        mov     esi,[eax+edi+0x18]     ds:00dfea07=???????? 61c81e3a 8b443814        mov     eax,[eax+edi+0x14]     ds:00dfea07=???????? 61c81e3e 52              push    edx 61c81e3f 50              push    eax 61c81e40 e83b070000      call    isMyJob_i (61c82580) 61c81e45 85c0            test    eax,eax 61c81e47 0f8447030000    je      MonitorThread+0x994 (61c82194) 61c81e4d 8b4c2414        mov     ecx,[esp+0x14]         ss:108ee50b=???????? FAULT ->61c81e51 f681dc02000002  test    byte ptr [ecx+0x2dc],0x2     ds:000002dc=?? 61c81e58 0f8436030000    je      MonitorThread+0x994 (61c82194) 61c81e5e 8bc6            mov     eax,esi 61c81e60 c644245400      mov     byte ptr [esp+0x54],0x0      ss:108ee50b=?? 61c81e65 83e001          and     eax,0x1 61c81e68 89442450        mov     [esp+0x50],eax         ss:108ee50b=???????? 61c81e6c 741c            jz      MonitorThread+0x68a (61c81e8a) 61c81e6e 8d7c2454        lea     edi,[esp+0x54]         ss:108ee50b=???????? 61c81e72 83c9ff          or      ecx,0xff 61c81e75 33c0            xor     eax,eax 61c81e77 8b159464c961                                   ds:61c96494=53554150 mov edx,[_NULL_IMPORT_DESCRIPTOR+0x1964 (61c96494)] 61c81e7d f2ae            repne   scasb                        es:00000000=??


 * > Stack Back Trace <*

FramePtr ReturnAd Param#1 Param#2  Param#3  Param#4  Function Name 0faeffb8 77f04ede 00000370 00000211 0cadfbd0 00000370 winvprt!MonitorThread (FPO: [EBP 0x00000211] [1,298,4]) 00000211 00000000 00000000 00000000 00000000 00000000 kernel32!lstrcmpiW NOTE: This problem does not occur in Host Integration Server 2000.



CAUSE
A small timing window exists in the print server when the Request Definite Response option is enabled for 3270 print sessions that results in the deletion of an internal print job control block. This in turn results in an access violation that terminates the print server service.

Due to the nature of the small timing window, the access violation is more likely to occur on multiprocessor systems.



RESOLUTION
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft SNA Server version 4.0 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

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

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 typical 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 fix should have the following file attributes or later:

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.



STATUS
Microsoft has confirmed that this is a problem in Microsoft SNA Server version 4.0.



MORE INFORMATION
The Request Definite Response option is selected in SNA Manager on the Transparency/GDI tab of the 3270 Print Session's Properties dialog box. This is an advanced option that should be enabled for applications that require a high level of assurance that the print job completed. This feature allows the print server to send a message to the host system to indicate that the print job completed.

Keywords: kbbug kbfix kbqfe KB308998

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