Occasional hang

Advertisement

SfwYary
Joined:
Posts:
2

Occasional hang

I have a scheduled task which calls WinSCP every two minutes, all day every day. It checks to see if a small file exists and if so, it transfers it.

About twice a week, WinSCP gets stuck and doesn't exit. There seems to be no consistent time of day, day of week- not sure how to reproduce other than to call up WinSCP thousands of times. I do have Process Explorer on the machine with WinSCP and can post stack trace & other interesting info, in addition to the usual logs, version number, scripts, etc. Here it goes:

WinSCP Version 4.3.3 (Build 1340) (OS 6.1.7600)
- Also happened with 4.2.9 (Build 938) (OS 6.1.7600)

Running on Windows Server 2008 R2 Standard

Transfer Protocol: SFTP (SCP) using a keypair

Using scripting, not the GUI. It's called from a scheduled task, called OvDExch, with no desktop interaction.

We have several logs, they all end like this (with different timestamps):

> 2011-06-01 17:25:08.485 Script: close
. 2011-06-01 17:25:08.485 Closing connection.
. 2011-06-01 17:25:08.485 Sending special code: 12
. 2011-06-01 17:25:08.485 Sent EOF message
. 2011-06-01 17:25:08.485 [Shell] Closing connection.
. 2011-06-01 17:25:08.485 [Shell] Sending special code: 12
. 2011-06-01 17:25:08.485 [Shell] Sent EOF message

I am emailing a zip file with full logs plus the scripts used, look for subject "Hang on June 1st".

Details on the hung process, via Process Explorer:

The "TCP/IP" tab shows that it has no connection open. (The same tab shows connections on an actively transferring WinSCP process.) It has been nearly a day between the process hang any my looking at it so I'm not sure when the connections closed.

Thread details about the hung WinSCP:

Thread 5952 - WinSCP.exe+0x1af4
State- Wait:WrUserRequest
stack- ntoskrnl.exe!SeAccessCheckWithHint+0xb4a
ntoskrnl.exe!HalPrivateDispatchTable+0x1190
wow64cpu.dll!TurboDispatchJumpAddressEnd+0x690
wow64cpu.dll!TurboDispatchJumpAddressEnd+0x649
wow64.dll!Wow64SystemServiceEx+0x1ce
wow64.dll!Wow64LdrpInitialize+0x429
ntdll.dll!RtlResetRtlTranslations+0x1b08
ntdll.dll!RtlResetRtlTranslations+0xc63
ntdll.dll!LdrInitializeThunk+0xe
USER32.dll!WaitMessage+0x15
WinSCP.exe!@Tbxtoolpals@initialization$qqrv+0x3aad4
WinSCP.exe!@@Winhelp@Finalize+0xcd9
WinSCP.exe!@@Winhelp@Finalize+0x11ef
WinSCP.exe!@@Winhelp@Finalize+0x1686
WinSCP.exe!@@Tools@Finalize+0x1678
WinSCP.exe!@@Tools@Finalize+0x1011
WinSCP.exe!__GetExceptDLLinfo+0x2f2
WinSCP.exe!@Tbxtoolpals@initialization$qqrv+0x8da6f
ntdll.dll!RtlInitializeExceptionChain+0x63
ntdll.dll!RtlInitializeExceptionChain+0x36

Thread 3016- ntdll.dll!EtwDeliverDataBlock+0x453
State- Wait:UserRequest
Stack- ntoskrnl.exe!SeAccessCheckWithHint+0xb4a
ntoskrnl.exe!KeAcquireSpinLockAtDpcLevel+0x7d2
ntoskrnl.exe!KeWaitForMutexObject+0x19f
ntoskrnl.exe!PsIsSystemProcess+0x94
ntoskrnl.exe!KeStackAttachProcess+0x11c1
ntoskrnl.exe!KeAcquireSpinLockAtDpcLevel+0x9dd
ntoskrnl.exe!KeWaitForMultipleObjects+0x26b
ntoskrnl.exe!MmCreateSection+0xe23
ntoskrnl.exe!NtOpenResourceManager+0x599
ntoskrnl.exe!KeSynchronizeExecution+0x3a43
wow64cpu.dll!TurboDispatchJumpAddressEnd+0x690
wow64cpu.dll!TurboDispatchJumpAddressEnd+0xe3
wow64.dll!Wow64SystemServiceEx+0x1ce
wow64.dll!Wow64LdrpInitialize+0x429
ntdll.dll!LdrGetProcedureAddress+0x24127
ntdll.dll!LdrInitializeThunk+0xe
ntdll.dll!NtWaitForMultipleObjects+0x15
kernel32.dll!BaseThreadInitThunk+0x12
ntdll.dll!RtlInitializeExceptionChain+0x63
ntdll.dll!RtlInitializeExceptionChain+0x36

Thread 5560- ntdll.dll!TpCallbackIndependent+0x238
State- Wait:WrQueue
Stack- ntoskrnl.exe!SeAccessCheckWithHint+0xb4a
ntoskrnl.exe!HalPrivateDispatchTable+0x1190
ntdll.dll!ZwWaitForWorkViaWorkerFactory+0xa
wow64.dll!Wow64EmulateAtlThunk+0x1c97f
wow64.dll!Wow64SystemServiceEx+0xd7
wow64cpu.dll!TurboDispatchJumpAddressEnd+0x24
wow64.dll!Wow64SystemServiceEx+0x1ce
wow64.dll!Wow64LdrpInitialize+0x429
ntdll.dll!LdrGetProcedureAddress+0x24127
ntdll.dll!LdrInitializeThunk+0xe
ntdll.dll!NtWaitForWorkViaWorkerFactory+0x12
kernel32.dll!BaseThreadInitThunk+0x12
ntdll.dll!RtlInitializeExceptionChain+0x63
ntdll.dll!RtlInitializeExceptionChain+0x36

I hope that the stack traces plus the logs can point you to the issue, even though the steps to reproduce are not clear.

Thanks for your time

Reply with quote

martin
Site Admin
martin avatar
Joined:
Posts:
27,227
Location:
Prague, Czechia

Re: Occasional hang

Thanks. Got the email. Will reply early next week.
_________________
Martin Prikryl

Reply with quote

SfwYary
Joined:
Posts:
2

Re: Occasional hang

Got your reply, got a repeat with the logs you asked for, and sent it zipped up with a message to your email address. Thanks!

Reply with quote

Advertisement

You can post new topics in this forum