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<div style='display: inline'>
<div style='font-family: 맑은 고딕, Consolas; font-size: 20pt; color: #006699; text-align: center; font-weight: bold'>Windbg - ERROR: Unable to load DLL mscordacwks_x86_x86_2.0.50727.4200.dll, Win32 error 0n2</div>
 
<a target='_tab' href='http://www.sysnet.pe.kr/2/0/991'>procdump.exe를 이용해서 생성한 닷넷 응용 프로그램의 덤프</a>를 고객사로부터 전달받아 windbg에 올려서 분석을 시작하려고 했습니다. 
 
windbg를 실행하고, 덤프를 로드하니 아래와 같이 procdump.exe를 이용하여 덤프를 받은 상황을 보여줍니다. 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
Loading Dump File [D:\...[생략]...\TestApp_110119_154225.dmp]
User Mini Dump File with Full Memory: Only application data is available

Comment: '
*** procdump -e -ma -t TestApp.exe
*** Unhandled exception'
Symbol search path is: SRV*\\localhost\e$\Symbols*http://msdl.microsoft.com/download/symbols;
Executable search path is:
Windows Server 2008/Windows Vista Version 6002 (Service Pack 2) MP (8 procs) Free x86 compatible
Product: Server, suite: TerminalServer SingleUserTS
Machine Name:
Debug session time: Wed Jan 19 15:42:25.000 2011 (UTC + 9:00)
System Uptime: 5 days 19:17:25.877
Process Uptime: 0 days 0:00:53.000
</pre>
 
여느 때와 다름없이 sos.dll을 로드하고, 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
0:000&gt; .loadby sos mscorwks
</pre>
 
예외 발생을 파악하기 위해 "!pe (printexception의 간략 명령어)" 명령을 내렸으나 다음과 같이 실행이 안되었습니다. 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
0:000&gt; !pe
CLRDLL: CLR DLL load disabled
Failed to load data access DLL, 0x80004005
Verify that 1) you have a recent build of the debugger (6.2.14 or newer)
 2) the file mscordacwks.dll that matches your version of mscorwks.dll is 
 in the version directory
 3) or, if you are debugging a dump file, verify that the file 
 mscordacwks_&lt;arch&gt;_&lt;arch&gt;_&lt;version&gt;.dll is on your symbol path.
 4) you are debugging on the same architecture as the dump file.
 For example, an IA64 dump file must be debugged on an IA64
 machine.

You can also run the debugger command .cordll to control the debugger's
load of mscordacwks.dll.  .cordll -ve -u -l will do a verbose reload.
If that succeeds, the SOS command should work on retry.

If you are debugging a minidump, you need to make sure that your executable
path is pointing to mscorwks.dll as well.
</pre>
 
혹시나 싶어 다른 명령도 수행해봤는데, 출력 결과만 좀 더 자세할 뿐 역시 오류가 발생합니다. 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
0:000&gt; !clrstack
CLRDLL: C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscordacwks.dll:2.0.50727.4952 f:0
doesn't match desired version 2.0.50727.4200 f:0
CLRDLL: Unable to find mscordacwks_x86_x86_2.0.50727.4200.dll by mscorwks search
CLRDLL: Unable to find 'mscordacwks_x86_x86_2.0.50727.4200.dll' on the path
CLRDLL: Unable to find mscorwks.dll by search
CLRDLL: ERROR: Unable to load DLL mscordacwks_x86_x86_2.0.50727.4200.dll, Win32 error 0n2
Failed to load data access DLL, 0x80004005
Verify that 1) you have a recent build of the debugger (6.2.14 or newer)
 2) the file mscordacwks.dll that matches your version of mscorwks.dll is 
 in the version directory
 3) or, if you are debugging a dump file, verify that the file 
 mscordacwks_&lt;arch&gt;_&lt;arch&gt;_&lt;version&gt;.dll is on your symbol path.
 4) you are debugging on the same architecture as the dump file.
 For example, an IA64 dump file must be debugged on an IA64
 machine.

You can also run the debugger command .cordll to control the debugger's
load of mscordacwks.dll.  .cordll -ve -u -l will do a verbose reload.
If that succeeds, the SOS command should work on retry.

If you are debugging a minidump, you need to make sure that your executable
path is pointing to mscorwks.dll as well.
</pre>
 
일러주는 대로 ".cordll..." 명령을 내려도 마찬가지! 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
0:000&gt; .cordll -ve -u -l
CLR DLL status: No load attempts
</pre>
 
다시 한번 "!pe" 명령을 내려보았는데, 웬일인지 이번에는 좀 더 친절한 메시지를 출력해 주었습니다. 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
0:000&gt; !pe
CLRDLL: C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscordacwks.dll:2.0.50727.42 f:0
doesn't match desired version 2.0.50727.4200 f:0
SYMSRV: \\localhost\d$\Symbols\mscordacwks_x86_x86_2.0.50727.4200.dll\4A9EE474590000\mscordacwks_x86_x86_2.0.50727.4200.dll not found
SYMSRV: http://msdl.microsoft.com/download/symbols/mscordacwks_x86_x86_2.0.50727.4200.dll/4A9EE474590000/mscordacwks_x86_x86_2.0.50727.4200.dll not found
SYMSRV: The operation timed out
CLRDLL: Unable to find mscordacwks_x86_x86_2.0.50727.4200.dll by mscorwks search
CLRDLL: Unable to find 'mscordacwks_x86_x86_2.0.50727.4200.dll' on the path
SYMSRV: \\localhost\d$\Symbols\mscorwks.dll\4A9EE474590000\mscorwks.dll not found
SYMSRV: http://msdl.microsoft.com/download/symbols/mscorwks.dll/4A9EE474590000/mscorwks.dll not found
SYMSRV: The operation timed out
CLRDLL: Unable to find mscorwks.dll by search
CLRDLL: ERROR: Unable to load DLL mscordacwks_x86_x86_2.0.50727.4200.dll, Win32 error 0n2
Failed to load data access DLL, 0x80004005
Verify that 1) you have a recent build of the debugger (6.2.14 or newer)
 2) the file mscordacwks.dll that matches your version of mscorwks.dll is 
 in the version directory
 3) or, if you are debugging a dump file, verify that the file 
 mscordacwks_&lt;arch&gt;_&lt;arch&gt;_&lt;version&gt;.dll is on your symbol path.
 4) you are debugging on the same architecture as the dump file.
 For example, an IA64 dump file must be debugged on an IA64
 machine.

You can also run the debugger command .cordll to control the debugger's
load of mscordacwks.dll.  .cordll -ve -u -l will do a verbose reload.
If that succeeds, the SOS command should work on retry.

If you are debugging a minidump, you need to make sure that your executable
path is pointing to mscorwks.dll as well.
</pre>
 
즉, 문제의 원인이란 것이 덤프를 생성했던 "Windows Server 2008 SP2" 시스템의 mscordacwks.dll을 마이크로소프트 측의 심벌 서버에서도 찾을 수 없었고, 제 시스템(Windows 7)의 mscordacwks.dll과도 다른 버전이라는 것입니다. (근데... 버전 차이가 묘하네요. "2.0.50727.42" / "2.0.50727.4200") 
 
검색을 해보았더니 아래의 글에 해결책이 있습니다. 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
"Failed to load data access DLL, 0x80004005" ? OR ? What is mscordacwks.dll?
; http://blogs.msdn.com/b/dougste/archive/2009/02/18/failed-to-load-data-access-dll-0x80004005-or-what-is-mscordacwks-dll.aspx
</pre>
 
정리해 보면, 그냥 간단하게 고객사 측에 "C:\Windows\Microsoft.NET\Framework\v2.0.50727\mscordacwks.dll" 파일을 요청한 후에, 아래의 메시지에서 보았던 경로에 정확하게 파일명까지 변경해서 넣어주면 됩니다. 
 
<pre style='margin: 10px 0px 10px 10px; padding: 10px 0px 10px 10px; width: 800px; background-color: #fbedbb; overflow-x: scroll; font-family: Consolas, Verdana;' >
SYMSRV: \\localhost\d$\Symbols\mscordacwks_x86_x86_2.0.50727.4200.dll\4A9EE474590000\mscordacwks_x86_x86_2.0.50727.4200.dll not found
</pre>

<hr />[이 글에 대해서 여러분들과 의견을 공유하고 싶습니다. 틀리거나 미흡한 부분 또는 의문 사항이 있으시면 언제든 댓글 남겨주십시오.]
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