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From Bryan Call <bc...@apache.org>
Subject Re: Troubleshooting a strange issue with missing scheme, and errored requests.
Date Thu, 12 Nov 2015 17:47:48 GMT
It is most likely related to this issue:

https://issues.apache.org/jira/browse/TS-1935

I had a hard time reproducing it in June and haven't had time since to look
at it.

-Bryan

On Thu, Nov 12, 2015 at 7:42 AM, Eric Duesterhaus <
eduesterhaus@knapheide.com> wrote:

> Hi Again Everyone!
>
>
>
> I’m having a strange issue that I’m not quite sure how to troubleshoot.
> About 2% of my requests are failing.
>
>
>
> Each time a request fails it increments the count in traffic_logstats
> under URL Schemes for “none” or “other”
>
> URL Schemes                            Count    Percent       Bytes
> Percent
>
>
> ------------------------------------------------------------------------------
>
> HTTP (port 80)                             7      0.01%      4.22KB
> 0.00%
>
> HTTPS (port 443)                     121,831     98.05%      1.23GB
> 100.00%
>
> none                                   *1,102*      0.89%
> 0.00KB      0.00%
>
> other                                  *1,316*      1.06%
> 0.00KB      0.00%
>
>
>
> Also in traffic_logstats, it shows something… odd:
>
>
>
> Origin Server                               Hits         Misses
> Errors
>
>
> ------------------------------------------------------------------------------
>
> originserver.example.com                     0
> 121,854              0
>
> dnsnamethatpointstoATS.example.com           0              7
> *1,316*
>
>
> ==============================================================================
>
>
>
> I have the following rules in remap.config:
>
> #redirect to HTTPS
>
> redirect        http://dnsnamethatpointstoATS.example.com
> https://dnsnamethatpointstoATS.example.com
>
> #remap rules to origin server
>
> map             https://dnsnamethatpointstoATS.example.com/SomeApplication
> https://originserver.example.com/SomeApplication
>
> reverse_map     https://originserver.example.com/SomeApplication
>    https://dnsnamethatpointstoATS.example.com/SomeApplication
>
> map             https://dnsnamethatpointstoATS.example.com/
> https://originserver.example.com/
>
> reverse_map     https://originserver.example.com/
>         https://dnsnamethatpointstoATS.example.com/
>
>
>
>
>
> The number of errors at the beginning of the logstats output correlates to
> the count of “other” errors with missing URL schema.  I’m not sure why some
> requests would be using “dnsnamethatpointstoATS.example.com” as the
> origin server, let alone with a Scheme of “other”.
>
>
>
>
>
> I get two types of errors in squid.blog when this happens:
>
>
>
> 1447283397.297 86400734 <ip address> ERROR_UNKNOWN(90)/000 0 GET
> dnsnamethatpointstoATS.example.com/SomeApplication/stuff - EMPTY/- -
>
> 1447283401.484 86400288 <ip address> ERROR_UNKNOWN(90)/000 0 - / - EMPTY/-
> -
>
>
>
> Requests that appear to be successful look like this in the squid.blog:
>
> 1447283475.486 96 <ip address> TCP_MISS/200 1178 GET
> https://originserver.example.com/SomeApplication/stuff - DIRECT/
> originserver.example.com application/json
>
>
>
> I can’t help but think I’ve done something incredibly wrong or dumb in my
> remap.config.
>
>
>
> Has anyone seen anything like this before?  I’m not quite sure what to do
> next for troubleshooting, as I’m super-green to ATS.  Anyone have any ideas
> or suggestions on what I should look at next, or focus my efforts on
> investigating?
>
>
>
>
>
> Eric Duesterhaus
>

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