503 Error, first byte timeout. Which Backend?

[Jason Price]

I was doing that... Grep -B 1... But the thread index number (left most
number) is different... Or is that different because it's doing back end
processing?

Jason <-- still figuring out varnishlog
On Jan 16, 2014 7:39 PM, "Stephen Wood" <smwood4 at gmail.com> wrote:

> You should see this value as "Backend" in your varnishlog output. It
> should be right above the FetchError line you posted.
>
>
> On Thu, Jan 16, 2014 at 3:38 PM, Jason Price <japrice at gmail.com> wrote:
>
>> So, I have backends which are occasionally slow.  So varnish responds
>> with a 503 error.
>>
>> How can I determine WHICH backend was used, which failed to respond in a
>> timely manner?
>>
>> In varnishlog, I see errors like the following:
>>
>>   180 FetchError   c http first read error: -1 11 (Resource temporarily
>> unavailable)
>>
>> Reading the code, the -1 SEEMS to indicate that the backend closed the
>> connection on this error.  vcl_error doesn't give me access to beresp
>> variables (like beresp.backend.name or IP, which would answer the
>> question).  This indicates that obj.* does NOT include a backend
>> indication...<https://www.varnish-cache.org/docs/3.0/reference/vcl.html#variables>
>>
>> Any way I can figure out which backend is failing me?
>>
>> --Jason
>>
>> _______________________________________________
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>> varnish-misc at varnish-cache.org
>> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>>
>
>
>
> --
> Stephen Wood
> www.heystephenwood.com
>
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