Troubleshooting IIS - friendly reinterpretation of HTTP Status Codes and Win32 errors.

Posted: Dec 19, 2008  5 comments  

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Recently I investigated an IIS issue. As part of my investigation I had to analyze W3 logs. While doing so, I realized that IIS 7.0 introduced so many sub-status codes  that I was not able to reinterpret them in my head any more. Luckily, I recalled that logparser had an ability to perform variety of transformations.  So I gave it a try. Below is a query that made my life easier. Some of you may find it similarly useful.

Logparser SQL script

select
    cs-uri-stem,
    STRCAT(STRCAT(TO_STRING(sc-status),'.'),TO_STRING(sc-substatus)) as ss,
    CASE ss
        when'200.0' then'HttpStatusOk'                 
        when'201.0' then'HttpStatusCreated'            
        when'204.0' then'HttpStatusNoContent'
        when'206.0' then'HttpStatusPartialContent'
        when'207.0' then'HttpStatusMultiStatus'
        when'301.0' then'HttpStatusMovedPermanently'
        when'302.0' then'HttpStatusRedirect'
        when'307.0' then'HttpStatusMovedTemporarily'
        when'304.0' then'HttpStatusNotModified'
        when'400.0' then'HttpStatusBadRequest'
        when'400.1' then'HttpStatusInvalidDestination'
        when'400.2' then'HttpStatusInvalidDepth'
        when'400.3' then'HttpStatusInvalidIf'
        when'400.4' then'HttpStatusInvalidOverwrite'
        when'400.5' then'HttpStatusInvalidTranslate'
        when'400.6' then'HttpStatusInvalidRequestBody'
        when'400.7' then'HttpStatusInvalidContentLength'
        when'401.0' then'HttpStatusUnauthorized'
        when'401.1' then'HttpStatusBadLogon'
        when'401.2' then'HttpStatusDeniedConfig'
        when'401.3' then'HttpStatusDeniedResource'
        when'401.4' then'HttpStatusDeniedFilter'
        when'401.5' then'HttpStatusDeniedApplication'
        when'403.0' then'HttpStatusForbidden'
        when'403.1' then'HttpStatusExecAccessDenied'
        when'403.2' then'HttpStatusReadAccessDenied'
        when'403.3' then'HttpStatusWriteAccessDenied'
        when'403.4' then'HttpStatusSSLRequired'
        when'403.5' then'HttpStatusSSL128Required'
        when'403.6' then'HttpStatusIPAddressReject'
        when'403.7' then'HttpStatusCertRequired'
        when'403.8' then'HttpStatusSiteAccessDenied'
        when'403.9' then'HttpStatusTooManyUsers'
        when'403.11' then'HttpStatusPasswordChange'
        when'403.12' then'HttpStatusMapperDenyAccess'
        when'403.13' then'HttpStatusCertRevoked'
        when'403.14' then'HttpStatusDirBrowsingDenied'
        when'403.16' then'HttpStatusCertInvalid'
        when'403.17' then'HttpStatusCertTimeInvalid'
        when'403.18' then'HttpStatusAppPoolDenied'
        when'403.19' then'HttpStatusInsufficientPrivilegeForCgi'
        when'403.20' then'HttpStatusPassportLoginFailure'
        when'403.21' then'HttpStatusSourceAccessDenied'
        when'403.22' then'HttpStatusInfiniteDepthDenied'
        when'404.0' then'HttpStatusNotFound'
        when'404.2' then'HttpStatusDeniedByPolicy'
        when'404.3' then'HttpStatusDeniedByMimeMap'
        when'404.4' then'HttpStatusNoHandler'
        when'404.5' then'HttpStatusDeniedByUrlSequence'
        when'404.6' then'HttpStatusDeniedByVerb'
        when'404.7' then'HttpStatusDeniedByFileExtension'
        when'404.8' then'HttpStatusHiddenSegment'
        when'404.9' then'HttpStatusFileAttributeHidden'
        when'404.10' then'HttpStatusRequestHeaderTooLong'
        when'404.11' then'HttpStatusUrlDoubleEscaped'
        when'404.12' then'HttpStatusUrlHasHighBitChars'
        when'404.13' then'HttpStatusContentLengthTooLarge'
        when'404.14' then'HttpStatus404UrlTooLong'
        when'404.15' then'HttpStatusQueryStringTooLong'
        when'404.16' then'HttpStatusStaticFileDav'
        when'404.17' then'HttpStatusPreconditionedHandler'
        when'404.18' then'HttpStatusDeniedByQueryStringSequence'
        when'404.19' then'HttpStatusDeniedByFilteringRule'
        when'405.0' then'HttpStatusMethodNotAllowed'
        when'406.0' then'HttpStatusNotAcceptable'
        when'407.0' then'HttpStatusProxyAuthRequired'
        when'409.0' then'HttpStatusConflict'
        when'412.0' then'HttpStatusPreconditionFailed'
        when'413.0' then'HttpStatusEntityTooLarge'
        when'414.0' then'HttpStatusUrlTooLong'
        when'415.0' then'HttpStatusUnsupportedMediaType'
        when'416.0' then'HttpStatusRangeNotSatisfiable'
        when'417.0' then'HttpStatusExpectationFailed'
        when'423.0' then'HttpStatusLockedError'
        when'424.0' then'HttpStatusFailedDependency'
        when'500.0' then'HttpStatusServerError'
        when'500.16' then'HttpStatusUNCAccess'
        when'500.19' then'HttpStatusBadMetadata'
        when'500.21' then'HttpStatusHandlersModule'
        when'500.22' then'HttpStatusAspnetModules'
        when'500.23' then'HttpStatusAspnetHandlers'
        when'500.24' then'HttpStatusAspnetImpersonation'
        when'501.0' then'HttpStatusNotImplemented'
        when'502.0' then'HttpStatusBadGateway'
        when'502.1' then'HttpStatusTimeout'
        when'502.2' then'HttpStatusPrematureExit'
        when'502.3' then'HttpStatusForwarderConnectionError'
        when'503.0' then'HttpStatusServiceUnavailable'
        when'503.2' then'HttpStatusAppConcurrent'
        when'504.0' then'HttpStatusGatewayTimeout'
        when'507.0' then'HttpStatusInsufficientStorage'
    END as w3-status-details,
    CASE sc-win32-status
        WHEN 0 then''
        WHEN 2148074254 then 'handshake in progress'
        ELSE WIN32_ERROR_DESCRIPTION(sc-win32-status)
    END as win32-error,
    sc-win32-status
from
    u_ex*.log

 

What does the above query do?

  • it concatenates the HTTP Status and HTTP Substatus  and then translates it to a readable string. Some of the text translations will be easier to understand than others.  I harvested all the sub-statuses known to IIS 7.0. But there may be other sub-statuses raised by other handlers.  
  • it attempts to translate sc-win32-status to a readable string.
    • In the case of SEC_E_NO_CREDENTIALS error (2148074254) it will interpret error as "handshake in progress". This error will be seen when windows Authentication is used and actual authentication requires additional roundtrip between client and server. Intermediate responses from server have status 401, sub-status 1 and Win32 error is set to 2148074254.

Steps to use the query

  1. If you don't have logparser on your machine yet then install it from:
    http://www.microsoft.com/downloads/details.aspx?FamilyID=890cd06b-abf8-4c25-91b2-8d975cf8c07^&displaylang=en.
    The default install location of logparser v2.2 is "C:\Program Files\Log Parser 2.2\" for X86 or "C:\Program Files (x86)\Log Parser 2.2\" for AMD64
  2. save the above logparser SQL statement to a file w3log_suberrors.sql.
  3. run the following command to execute the query using the rather convenient data grid. Example assumes the default W3C logging format.
    logparser file:w3log_suberrors.sql -o:DATAGRID -rtp 20
  4. (optional) customize to fit your needs
    • the set of fields you want to observe,
    • choice of log files (in the "from" clause)
    • logging format (though it will require you to modify the field names)

Please let me know if you have suggestions what else to reinterpret to make the log analysis little bit easier.

Comments

Logparser is pretty handy tool.

Thanks for sharing the query. Very knowledgable.

~ Ganesh

Dec 19 2008 by ganeshanekar

much apprecieated, thanks for sharing.

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Mar 01 2009 by Anonymous

Dude - you rock. I was about to write a query to do this same function - thanks for saving me the time and trouble!

Mar 02 2009 by robmcm

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