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| Why does MQSeries VB DLL fails intermittently? |
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| farteau |
 Posted: Thu Nov 29, 2001 8:29 am Post subject: |
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Newbie
Joined: 27 Nov 2001
Posts: 2
Location: Quebec (Canada)
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I am using a VB DLL that I register into MTS to call MQ Client 5.1 on Win NT4 ( SP6a ) server. The DLL is invoked from an ASP page.
Approximately 0.1% to 0.5% of calls to this DLL result in "out of memory" error returned by the MQSeries component.
The problem is very difficult to reproduce, but I have to fix it.
When it happens, this mesage appears in NT Event viewer :
Event ID : 4101
Source : Transaction Server
Type : Error
Category : Context Wrapper
Details :
An object call caused an exception. (Package: DEBUG-MQSERIES) (ProgId: DebugMQSeriesAPART.Client) (CLSID: {AF8F2C5D-B9F9-46CA-998C-D6673C877DC0}) (Interface: Client) (IID: {97A6CF13-4204-4351-9EE3-8455589A3EEC}) (Method: 7) (Microsoft Transaction Server Internals Information: File: i:vipersrcruntimecwcwlib.cpp, Line: 935) (Exception: C0000005) (Address: 0x015411be)
AMQRMQIA!zstMQCONNX + 0x18E
Anyone any ideas ? Is this a known issue with problems regarding threading with MQ Series client?
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| sanvaranasi |
| Posted: Thu Mar 18, 2004 9:03 pm Post subject: Any Solution. I am facing a similar problem |
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Novice
Joined: 24 Feb 2004
Posts: 10
Location: india
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Hi Farteau,
I am facing a similar problem. HAve you found a solution yet.
I am having a ATL COM componenet that is deployed under IIS. I have WebphsereMQ5.3 server version installed on the same machine. Sometimes i get this exception stated below and all reads from queue stop (the component is actually used only for reading from queue. It does not happen always. The log generated in event viewer is as follows:
The system has called a custom component and that component has failed and generated an exception. This indicates a problem with the custom component. Notify the developer of this component that a failure has occurred and provide them with the information below.
Component Prog ID:
Server Application ID: {910F8FCF-B61C-4A21-A73E-C269EA5D2035}
Server Application Name: QLMMqComp
The serious nature of this error has caused the process to terminate.
Exception: C0000005
Address: 0x7800FA97
Call Stack:
MSVCRT!setvbuf + 0x7CC
...
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| JasonE |
| Posted: Fri Mar 19, 2004 2:20 am Post subject: |
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Grand Master
Joined: 03 Nov 2003
Posts: 1220
Location: Hursley
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farteau - Yours is almost definitely caused by a coding issue.
An MQCONN(X) takes as a parameter an MQCHAR42, and may try to read all 42 bytes. I would bet you are doing something like MQCONN("QM",... or MQCONNX("",... or MQCONN(fred,... where fred is a String. VB has a habit of putting these variables very intermittently near a page boundary, and the subsequent page is not readable. It results in a trap in amqrmqia at around offset 1b7 (depending on the version, release and fixpack level, so 0x18? is almost certainly the match)
The solutions...
1. Ensure the parameter is as defined to the C layer, ie
Dim qmname as String * 48
qmname = "fred"
MQCONN(qmname,...
2. Apply a recent fix level - I changed it to tollerate null terminated strings via an APAR which should work most of the time
contact admin - Yours sounds different, you didnt put enough call stack in to see what MQ function the trap is occurring in. MSVCRT is just the C runtime! |
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| sanvaranasi |
| Posted: Fri Mar 19, 2004 2:32 am Post subject: |
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Novice
Joined: 24 Feb 2004
Posts: 10
Location: india
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ok i figured out the problem. i was trying to format a MQLong to CString using %s rather than %d
So the point where it was bombing was written as under
CString szReasonCode;
szReasonCode.format("Mq returned Reason Code %s", MQ_REASON_CODE);
where MQ_REASON_CODE is a variable holding MQLong value.
I corrected it to %d.
For reference here is the complete error that i was getting.
-------------------------------------------------------------------
Component Prog ID:
Server Application ID: {910F8FCF-B61C-4A21-A73E-C269EA5D2035}
Server Application Name: QLMMqComp
The serious nature of this error has caused the process to terminate.
Exception: C0000005
Address: 0x7800FA97
Call Stack:
MSVCRT!setvbuf + 0x7CC
MSVCRT!vsprintf + 0x2D
MFC42!Ordinal2827 + 0x348
MFC42!Ordinal2818 + 0x12
RPCRT4!NdrServerMarshall + 0x12F6
RPCRT4 + 0x65AD7
RPCRT4!CStdStubBuffer_Invoke + 0x6B
OLEAUT32!UserEXCEPINFO_free_local + 0x20F4
ole32!WdtpInterfacePointer_UserSize + 0x980
ole32!UpdateDCOMSettings + 0xB136
ole32!CoGetPSClsid + 0x1007
ole32!CoGetPSClsid + 0xE71
ole32!WdtpInterfacePointer_UserSize + 0x55D
ole32!WdtpInterfacePointer_UserSize + 0xCB5
ole32!WdtpInterfacePointer_UserSize + 0x9F8
ole32!UpdateDCOMSettings + 0x75FC
USER32!SetWindowPlacement + 0x50
USER32!TranslateMessageEx + 0x605
USER32!DispatchMessageW + 0xB
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0
+ 0xA8FB8
COMSVCS + 0x128960
+ 0x7F2A8
+ 0x9F8A8
+ 0xA5FF8
+ 0x9AB00
+ 0xA01B8
+ 0xA6880
+ 0xA66B0 |
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