Stress Testing causes server to hang

Stephen Livesey

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Jul 30, 2002, 11:51:02 AM7/30/02

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We have developed a VB DLL that we have loaded into COM and our website uses
this object very extensively.

Under low usage (1-2 concurrent users) no problems occur, as soon as we test
is using the MS Stress Test Tool simulating 100 users, the following error
appears in the event log:

Event Type: Error
Event Source: COM+
Event Category: SVC
Event ID: 4194
Date: 30/07/2002
Time: 16:36:22
User: N/A
Computer: WEBTEST
Description:
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: {3A348B5B-A76C-4DF7-884F-F576D90869F1}
Server Application Name: web3ex_v2_15
The serious nature of this error has caused the process to terminate.
Exception: C0000005
Address: 0x1F45E8DA
Call Stack:
msado15!DllGetClassObject + 0x1517C
msado15 + 0x16F9
msado15!DllGetClassObject + 0x1D6
msado15 + 0x565AC
MSVBVM60!__vbaNew + 0x21
web3ex_v2_15 + 0x2A066
web3ex_v2_15 + 0x55C85
OLEAUT32!DispCallFunc + 0x15D
MSVBVM60!BASIC_CLASS_Invoke + 0x259
MSVBVM60!BASIC_CLASS_Invoke + 0x52
OLEAUT32!UserEXCEPINFO_free_local + 0x57B

Does anyone have any idea what this error means? and how to fix?

Thanks
Stephen Livesey

Pat

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Jul 31, 2002, 1:02:01 AM7/31/02

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This is actually a failure in MDAC, not your component. Upgrade to the
latest MDAC (www.microsoft.com/data) and see if the issue goes away.

Pat

"Stephen Livesey" <exac...@hotmail.com> wrote in message
news:edp3oC#NCHA.2512@tkmsftngp10...

Stephen Livesey

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Jul 31, 2002, 6:42:25 AM7/31/02

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I have now upgraded to the latest MDAC (v2.7.9001.0), however I am now
getting a slightly different error in the event log as follows:

Event Type: Error
Event Source: COM+
Event Category: SVC
Event ID: 4194

Date: 31/07/2002
Time: 09:01:37

User: N/A
Computer: WEBTEST
Description:
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: {3A348B5B-A76C-4DF7-884F-F576D90869F1}
Server Application Name: web3ex_v2_15
The serious nature of this error has caused the process to terminate.
Exception: C0000005

Address: 0x1F4321F4
Call Stack:
msado15 + 0x21F4
msado15 + 0x52E1
msado15!DllGetClassObject + 0x3609
msado15 + 0x587CE

MSVBVM60!__vbaNew + 0x21
web3ex_v2_15 + 0x2A066
web3ex_v2_15 + 0x55C85
OLEAUT32!DispCallFunc + 0x15D
MSVBVM60!BASIC_CLASS_Invoke + 0x259
MSVBVM60!BASIC_CLASS_Invoke + 0x52
OLEAUT32!UserEXCEPINFO_free_local + 0x57B

Any other ideas?

Thanks
Stephen Livesey

"Pat" <patf...@attbi.com> wrote in message
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Stefan Schachner[MS]

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Jul 31, 2002, 1:59:08 PM7/31/02

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What does the application do? Is there away to remove the application and
see if the errors go away ?

Stefan B. Schachner MCSE MCP MCP +I
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Pat

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Jul 31, 2002, 4:40:16 PM7/31/02

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That is still a failure in MDAC. I think that you should open a case w/MS
and see if there is a fix.

Pat

"Stephen Livesey" <exac...@hotmail.com> wrote in message

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Stefan Schachner[MS]

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Aug 1, 2002, 8:40:38 AM8/1/02

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I am not so sure I agree with you we it may be how the custom application
is calling the msado15... I would definitley like to know the versions adn
time stamp of the MSADO15.. That would be very helpful...

Stephen Livesey

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Aug 1, 2002, 11:27:46 AM8/1/02

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I seem to have resolved my problem!

My dll was making multiple calls to App.Major and App.Minor, I removed these
and the site now runs perfectly, no errors occur and the speed of the site
has been greatly improved.

I don't understand why this has made a difference, but I won't be using the
App object again.

Stephen Livesey

"Pat" <patf...@attbi.com> wrote in message

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Stephen Livesey

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Aug 1, 2002, 12:18:15 PM8/1/02

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The version of the msado15.dll file is 2.70.9001.0 and the timestamp is
19/02/2002 16:36

"Stefan Schachner[MS]" <sschac...@microsoft.com> wrote in message
news:LcOqMiVOCHA.2124@cpmsftngxa07...

Stefan Schachner[MS]

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Aug 1, 2002, 3:56:01 PM8/1/02

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Sounds good let me know if there is anything else I can do ...