SERVICES Hello,

I'm running an Application on Windows Server 2003 (not installed SP1) and
IIS 6 in worker process isolation mode. The application is coded with
Perl and runs under PerlEx 2.3.1. For rewriting URL's I'm using ISAPI
Rewrite 2.8.0056.

The server handles about 50.000 pageviews a day and sometime (not
reproducible) I get errors.
I get "Invalid access to memory location", "A dynamic link library
(DLL) initialization routine failed."
or "friendly" error "HTTP 500 - Internal server error" !

But the most errors didnt't sent to clients. Then the worker process
didn't use any
CPU anymore. It just hangs and didn't serve any pages because it's not
responding.

But I get no significant errors in the eventlog or otherwise.
In the PerlEx logs there is only a gap if server is not responding and no
error messages !

Here are some errors and warnings from system-eventlog:
EventID 1013:
A process serving application pool 'InternetCMSAppPool' exceeded time
limits
during shut down. The process id was '3292'.

EventID 1009:
A process serving application pool 'InternetCMSAppPool' terminated
unexpectedly.
The process id was '704'. The process exit code was '0xc0000005'.

Then I have to recycle application pool and sometimes only iisreset
works !
I've installed IISHangAgent, IISState and the symbols to find the
error.

IISHangAgent write logfiles of last served files and pages but i found
no correlation
between errors.

At last hang i run iisstate.
here is the logfile:

Opened log file 'C:\iisstate\output\IISState-2892.log'

***********************
Starting new log output
IISState version 3.3.1

Thu Feb 09 09:56:47 2006

OS = Windows 2003 Server
Executable: w3wp.exe
PID =  2892

Note: Thread times are formatted as HH:MM:SS.ms

***********************

Thread ID: 0
System Thread ID: 9ec
Kernel Time: 0:0:0.15
User Time: 0:0:0.46
*** ERROR: Symbol file could not be found.  Defaulted to export symbols
for C:\WINDOWS\system32\ntdll.dll -
*** ERROR: Symbol file could not be found.  Defaulted to export symbols
for C:\WINDOWS\system32\kernel32.dll -
Thread Status: Thread is in a WAIT state.
Thread Type: Other
# ChildEBP RetAddr
00 0006fe58 77f43741 SharedUserData!SystemCallStub+0x4
WARNING: Stack unwind information not available. Following frames may
be wrong.
01 0006fecc 77e4168f ntdll!NtWaitForSingleObject+0xc
02 010012a0 72617453 kernel32!WaitForSingleObject+0xf
03 33576c55 00000000 0x72617453

Thread ID: 1
System Thread ID: c00
Kernel Time: 0:0:0.0
User Time: 0:0:0.0
Thread Type: Other
# ChildEBP RetAddr
00 009fff9c 77f4262b SharedUserData!SystemCallStub+0x4
WARNING: Stack unwind information not available. Following frames may
be wrong.
01 009fffb8 77e4a990 ntdll!NtDelayExecution+0xc
02 009fffec 00000000 kernel32!FlsSetValue+0x779

Thread ID: 2
System Thread ID: 10d8
Kernel Time: 0:0:0.0
User Time: 0:0:0.0
Thread Type: Other
# ChildEBP RetAddr
00 00a3ff70 77f430c7 SharedUserData!SystemCallStub+0x4
WARNING: Stack unwind information not available. Following frames may
be wrong.
01 00a3ffb8 77e4a990 ntdll!ZwRemoveIoCompletion+0xc
02 00a3ffec 00000000 kernel32!FlsSetValue+0x779

Thread ID: 3
System Thread ID: 1208
Kernel Time: 0:0:0.0
User Time: 0:0:0.0
*** ERROR: Symbol file could not be found.  Defaulted to export symbols
for C:\WINDOWS\system32\RPCRT4.dll -
Thread Type: Possible ASP page.  Possible DCOM activity
Executing Page: *** ERROR: Symbol file could not be found.  Defaulted
to export symbols for \\?\C:\WINDOWS\system32\inetsrv\asp.dll -
ASP.dll symbols not found. Unable to locate ASP page.
Continuing with other analysis.

*** ERROR: Symbol file could not be found.  Defaulted to export symbols
for C:\WINDOWS\system32\ole32.dll -
OLE32.dll Symbols not found. Unable to proceed with DCOM check.
Continuing other analysis.

# ChildEBP RetAddr
00 00aafe20 77f4313f SharedUserData!SystemCallStub+0x4
WARNING: Stack unwind information not available. Following frames may
be wrong.
01 00aaff8c 77c60829 ntdll!NtReplyWaitReceivePortEx+0xc
02 00aaffb0 77c60857 RPCRT4!NdrRangeUnmarshall+0x5a9
03 00aaffec 00000000 RPCRT4!NdrRangeUnmarshall+0x5d7

Thread ID: 4
System Thread ID: e54
Kernel Time: 0:0:0.671
User Time: 0:0:4.937
*** WARNING: Unable to verify checksum for
Thread Type: Other
# ChildEBP RetAddr
00 00cade30 00000000 SharedUserData!SystemCallStub+0x4
GetContextState failed, 0x8007001F
GetContextState failed, 0x8007001F
GetContextState failed, 0x8007001F

Thread ID: 5
System Thread ID: 0
Kernel Time: 0:0:0.781
User Time: 0:0:5.546
GetContextState failed, 0x8007001F

---------
what can i do for better debugging ?
thanks for any help !!!

best regards

Christoph Reithmair

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