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• 10-14-2009, 11:07 PM

  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46

  ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact I would like to clarify the data for the Failed Requests stat on the Monitoring and Management for Server Farms.  This stat is not currently documented on TechNet (http://technet.microsoft.com/en-us/library/dd443506(WS.10).aspx) I am assuming a failed request that is one that is passed to a node in the farm that does not return back to the ARR. I am further guessing the primary reasons would be: node dies, network fails, the operator fails to gracefully take a node offline, etc. Jim

  Tags: IIS 7ARR v2 RCMonitoring

• 10-16-2009, 12:16 AM

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  cpattekar Joined on 04-11-2007, 8:32 PM Posts 48	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Yes, you are right. 404 responses from the node will not be considered as "failed requests". CJ Pattekar Software Desgin Engg in Test IIS Product Unit Microsoft

• 10-16-2009, 10:33 AM

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  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Thanks

• 10-16-2009, 12:49 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact What is considered failed request would depend on your failure definition - all connection errors will be treated as failed requests and any status codes configured in liveTrafficFailureCodes will be treated as failed requests. Anil Ruia Senior Software Design Engineer IIS Core Server

• 10-19-2009, 5:56 PM

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  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Anil, Can you reference me to where the TrafficFailureCodes reside?  I do not see the the TrafficFailureCodes heading in the server configuration store files in  %Windows%\System32\inetsvr\config.  Jim

• 10-19-2009, 6:35 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Look at %windir%\system32\inetsrv\config\schema\arr_schema.xml for the ARR schema. Anil Ruia Senior Software Design Engineer IIS Core Server

• 10-21-2009, 12:25 PM

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  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact I found the TrafficFailureCodes reference, it is referencing codes "500-". Should I be able to find a 5xx code on the ARR server logs?  I have done some preliminary checking and have not seen any 5xx errors, during times when I know there have been failed requests. Jim
  	Tags: IIS 7ARR v2 RC

• 10-21-2009, 12:51 PM

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  cpattekar Joined on 04-11-2007, 8:32 PM Posts 48	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact The "failed requests" could be a result of "connection error" as well, like Anil mentioned. CJ Pattekar Software Desgin Engg in Test IIS Product Unit Microsoft

• 10-21-2009, 3:10 PM

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  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Ok, I have found a 500 error one of the content servers on the server farm. Can you tell me what happens to the request on the ARR when a content server in a server farm has a failed request?  Does the ARR re-submit the request to another node or does the fail go back the browser? Jim

• 10-22-2009, 2:08 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Use failed request tracing.  There is even a walkthrough for it - http://learn.iis.net/page.aspx/488/using-failed-request-tracing-rules-to-troubleshoot-application-request-routing-arr/ Anil Ruia Senior Software Design Engineer IIS Core Server

• 10-26-2009, 2:06 PM

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  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46

  Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Anil, Thanks, I have used the ARR freb tracing walkthrough before, and I agree it is very helpful for isolating a specific request.  However, the issue in my inquiry was was if ARR automatically retried a failed request to another node on the server farm so that the request failure would not go all the way back to the end user .  Looking at the logs in more detail, I can now see that this is not happening.  Has the ARR team ever considered a retry mechanism? Perhaps you could also shed some light on why the HTTP response codes are altered by ARR.  In the example below, a 500 response from a sever farm node was converted to a 400 (bad request) response to the client. (NODE) 2009-10-21 22:41:03 IP GET /App/Page.aspx Param1=xxx&X-ARR-LOG-ID=xxx 443 - OriginIP  Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.0) 200 0 0 468 (ARR ) 2009-10-21 22:41:05 IP GET /App/Page.aspx Param1=xxx&X-ARR-CACHE-HIT=0&X-ARR-LOG-ID=xxx 443 - OriginIP Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.0) 200 0 0 1684 (NODE) 2009-10-21 22:44:26 IP POST /App/Page.asp Param1=xxx&X-ARR-LOG-ID=xxx 443 - OriginIP  Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.0) 500 0 64 128107 (ARR ) 2009-10-21 22:44:26 IP POST /App/Page.aspx Param1=xxx&X-ARR-CACHE-HIT=0&X-ARR-LOG-ID=xxx 443 - OriginIP Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.0) 400 0 64 128108 Thanks for your feedback.  Jim

• 10-26-2009, 3:34 PM

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  anilr Joined on 05-23-2006, 10:13 PM Redmond, WA Posts 2,343

  Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact We have considered retrying the request but never implemented it after feedback from multiple people that they would not want to use it. As for the 400 in the ARR logs - if the client disconnects before receiving the complete response, ARR will log it as a 400 to signify that - the win32 status of 64 seems to match up with the client disconnecting before receiving the complete response. Anil Ruia Senior Software Design Engineer IIS Core Server

• 10-29-2009, 5:05 PM

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  JAltrichter Joined on 06-12-2009, 2:36 PM Posts 46	Re: ARR v2 RC Monitoring and Management Form Failed Request Stats Reply Contact Thanks Anil.  I believe I understand the reason behind the 400 response now.