Wordpress and error 503 backend fetch failed

[Andrei]

Hello,

Your backend server is returning a 503 with Retry-After: 5 to Varnish. I
suggest reviewing your backend logs for the reason the requests aren't
going through as expected.

On Fri, Oct 21, 2016 at 4:54 AM, Ayberk Kimsesiz <ayberk.kimsesiz at gmail.com>
wrote:

> Hi,
>
> We are having serious problems with Varnish.
> The system was running smoothly for months but now gives the following
> errors
>
> Pages are either completely not loading or while they are loading it takes
> 5-6 seconds to load especially .jpg files.
>
>
> ​
>
> Varnishlog:
>
>    BereqHeader    Accept-Language: en-us,en
> -   BereqHeader    Accept-Charset: iso-8859-1,*,utf-8
> -   BereqHeader    X-Actual-IP: 85.103.145.67
> -   BereqHeader    X-Forwarded-For: 85.103.145.67, 85.103.145.67
> -   BereqHeader    Accept-Encoding: gzip
> -   BereqHeader    X-Varnish: 1147158
> -   VCL_call       BACKEND_FETCH
> -   VCL_return     fetch
> -   BackendOpen    31 boot.default 176.53.126.10 8080 176.53.126.10 56062
> -   BackendStart   176.53.126.10 8080
> -   Timestamp      Bereq: 1477043059.209814 0.000116 0.000116
> -   FetchError     http first read error: EOF
> -   BackendClose   31 boot.default
> -   Timestamp      Beresp: 1477043119.209551 59.999853 59.999737
> -   Timestamp      Error: 1477043119.209561 59.999863 0.000010
> -   BerespProtocol HTTP/1.1
> -   BerespStatus   503
> -   BerespReason   Service Unavailable
> -   BerespReason   Backend fetch failed
> -   BerespHeader   Date: Fri, 21 Oct 2016 09:45:19 GMT
> -   BerespHeader   Server: Varnish
> -   VCL_call       BACKEND_ERROR
> -   BerespHeader   Content-Type: text/html; charset=utf-8
> -   BerespHeader   Retry-After: 5
> -   VCL_return     deliver
> -   Storage        malloc Transient
> -   ObjProtocol    HTTP/1.1
> -   ObjStatus      503
> -   ObjReason      Backend fetch failed
> -   ObjHeader      Date: Fri, 21 Oct 2016 09:45:19 GMT
> -   ObjHeader      Server: Varnish
> -   ObjHeader      Content-Type: text/html; charset=utf-8
> -   ObjHeader      Retry-After: 5
> -   Length         284
> -   BereqAcct      519 0 519 0 0 0
> -   End
>
> *   << Session  >> 6717525
> -   Begin          sess 0 HTTP/1
> -   SessOpen       193.86.18.178 59638 :80 176.53.126.10 80
> 1477043113.589802 45
> -   Link           req 6717526 rxreq
> -   Link           req 33158 rxreq
> -   Link           req 6717528 rxreq
> -   Link           req 6717529 rxreq
> -   Link           req 6717530 rxreq
> -   Link           req 6225952 rxreq
> -   Link           req 6717532 rxreq
> -   Link           req 33165 rxreq
> -   Link           req 33167 rxreq
> -   Link           req 6717535 rxreq
> -   Link           req 3014918 rxreq
> -   Link           req 6717538 rxreq
> -   Link           req 6717539 rxreq
> -   Link           req 6225957 rxreq
> -   Link           req 6225958 rxreq
> -   Link           req 6717542 rxreq
> -   SessClose      RX_TIMEOUT 6.679
> -   End
>
>
>
>
> _______________________________________________
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> varnish-misc at varnish-cache.org
> https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
>
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