Microsoft KB Archive/325795

= Access Violation in Snakrnl!ReleaseBuffer on End User Client =

Article ID: 325795

Article Last Modified on 2/22/2007

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APPLIES TO


 * Microsoft Host Integration Server 2000 Standard Edition

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This article was previously published under Q325795



NOTE: This article also applies to Microsoft Host Integration Server 2000 Service Pack 1 (SP1)



SYMPTOMS
If you try to run more than 50 SNA applications concurrently, the Host Integration Server 2000 End User client may generate an access violation in Snakrnl!ReleaseBuffer.

If Drwtsn32.exe is configured as the default debugger, the Drwtsn32.log will be updated with information similar to the following when the access violation occurs: Application exception occurred: App: (pid=3504) When: 6/25/2002 @ 08:07:58.652 Exception number: c0000005 (access violation)

function: ReleaseBuffer 620879bd 90              nop 620879be 90              nop 620879bf 90              nop 620879c0 55              push    ebp 620879c1 8bec            mov     ebp,esp 620879c3 51              push    ecx 620879c4 a14c430b62      mov     eax,[620b434c]         ds:620b434c=00000000 620879c9 56              push    esi 620879ca 8945fc          mov     [ebp+0xfc],eax         ss:0303d52e=???????? 620879cd 8b45fc          mov     eax,[ebp+0xfc]         ss:0303d52e=???????? FAULT ->620879d0 f0ff00          lock    inc dword ptr [eax]    ds:00000000=???????? 620879d3 8b0d40430b62    mov     ecx,[620b4340]         ds:620b4340=02320000 620879d9 83c104          add     ecx,0x4 620879dc 894dfc          mov     [ebp+0xfc],ecx         ss:0303d52e=???????? 620879df 8b45fc          mov     eax,[ebp+0xfc]         ss:0303d52e=???????? 620879e2 f0ff00          lock    inc dword ptr [eax]    ds:00000000=???????? 620879e5 8b35f8100862    mov     esi,[620810f8]         ds:620810f8=77e83b4c 620879eb 8b1540430b62    mov     edx,[620b4340]         ds:620b4340=02320000 620879f1 8955fc          mov     [ebp+0xfc],edx         ss:0303d52e=???????? 620879f4 8b55fc          mov     edx,[ebp+0xfc]         ss:0303d52e=???????? 620879f7 b8ffffffff      mov     eax,0xffffffff 620879fc 8702            xchg    [edx],eax              ds:0231ffa0=00000000


 * > Stack Back Trace <*

FramePtr ReturnAd Param#1 Param#2  Param#3  Param#4  Function Name 0231FF5C 6208978C 00000003 00000000 77F82207 77E969AF snakrnl!ReleaseBuffer 77F82207 4AFFC033 E9850F08 89000005 FFF00C42 8D0F044A snakrnl!BufferPoolAudit 0424548B 00000000 00000000 00000000 00000000 00000000



WORKAROUND
To work around this problem if you have to run more than 50 concurrent SNA applications, install the Host Integration Server 2000 Administrator client.



STATUS
Microsoft has confirmed that this is a problem in Microsoft Host Integration Server 2000 and Microsoft Host Integration Server 2000 SP1.



MORE INFORMATION
The following list summarizes the number of concurrent SNA applications that are supported by various SNA Server and Host Integration Server 2000 clients:   Client                                      Maximum Number of                                                 SNA Applications --  Host Integration Server 2000 End User Client          50 Host Integration Server 2000 Administration Client  255 SNA Server 4.0 Client for Windows NT                255 SNA Server 4.0 Client for Windows 9x                 50

Additional query words: HIS 2000

Keywords: kbbug kbnofix KB325795

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