503 Errors on POST

Torrance torrance123 at gmail.com
Sat Jan 30 00:32:33 CET 2010


Hi Tollef,

I've pasted the logs of two failed requests below. As you can see,
they're both in response to POST requests, though I was overstating the
frequency at which these errors are occurring: they're occurring about
10% of the time.

To be honest, I don't entirely understand the logs or their format, but
I hope I've captured the important details. (Session IDs have been
deleted, btw).

Many thanks,
Torrance


   15 ReqStart     c 125.236.128.219 51361 561006524
   15 RxRequest    c POST
   15 RxURL        c /node/78063/edit
   15 RxProtocol   c HTTP/1.1
   15 RxHeader     c Host: indymedia.org.nz
   15 RxHeader     c User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS
X 10.6; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6
   15 RxHeader     c Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
   15 RxHeader     c Accept-Language: en-gb,en;q=0.5
   15 RxHeader     c Accept-Encoding: gzip,deflate
   15 RxHeader     c Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
   15 RxHeader     c Keep-Alive: 115
   15 RxHeader     c Connection: keep-alive
   15 RxHeader     c Referer: http://indymedia.org.nz/node/78063/edit
   15 RxHeader     c Cookie: comment_info_name=Tester;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx; has_js=1
   15 RxHeader     c Content-Type: multipart/form-data;
boundary=---------------------------1850078892860212931738819713
   15 RxHeader     c Content-Length: 16978
   15 VCL_call     c recv
   15 VCL_return   c pass
   15 VCL_call     c pass
   15 VCL_return   c pass
   15 Backend      c 10 default default
   10 TxRequest    b POST
   10 TxURL        b /node/78063/edit
   10 TxProtocol   b HTTP/1.1
   10 TxHeader     b Host: indymedia.org.nz
   10 TxHeader     b User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS
X 10.6; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6
   10 TxHeader     b Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
   10 TxHeader     b Accept-Language: en-gb,en;q=0.5
   10 TxHeader     b Accept-Encoding: gzip,deflate
   10 TxHeader     b Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
   10 TxHeader     b Referer: http://indymedia.org.nz/node/78063/edit
   10 TxHeader     b Cookie: comment_info_name=Tester;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx; has_js=1
   10 TxHeader     b Content-Type: multipart/form-data;
boundary=---------------------------1850078892860212931738819713
   10 TxHeader     b Content-Length: 16978
   10 TxHeader     b X-Forwarded-For: 125.236.128.219
   10 TxHeader     b X-Varnish: 561006524
   10 TxHeader     b X-Forwarded-For: 125.236.128.219
   10 BackendClose b default
   15 VCL_call     c error
   15 VCL_return   c deliver
   15 Length       c 465
   15 VCL_call     c deliver
   15 VCL_return   c deliver
   15 TxProtocol   c HTTP/1.1
   15 TxStatus     c 503
   15 TxResponse   c Service Unavailable
   15 TxHeader     c Server: Varnish
   15 TxHeader     c Retry-After: 0
   15 TxHeader     c Content-Type: text/html; charset=utf-8
   15 TxHeader     c Content-Length: 465
   15 TxHeader     c Date: Fri, 29 Jan 2010 23:00:42 GMT
   15 TxHeader     c X-Varnish: 561006524
   15 TxHeader     c Age: 1
   15 TxHeader     c Via: 1.1 varnish
   15 TxHeader     c Connection: close
   15 ReqEnd       c 561006524 1264806040.957435846 1264806042.241542339
4.125935793 1.284075260 0.000031233
   15 SessionClose c error
   15 StatSess     c 125.236.128.219 51361 14 1 3 0 3 2 1410 49426
    0 StatAddr     - 125.236.128.219 0 1102 34 74 0 32 42 38287 1054700


   21 ReqStart     c 125.236.128.219 53669 561007510
   21 RxRequest    c POST
   21 RxURL        c /node/78063/edit
   21 RxProtocol   c HTTP/1.1
   21 RxHeader     c Host: indymedia.org.nz
   21 RxHeader     c User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS
X 10.6; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6
   21 RxHeader     c Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
   21 RxHeader     c Accept-Language: en-gb,en;q=0.5
   21 RxHeader     c Accept-Encoding: gzip,deflate
   21 RxHeader     c Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
   21 RxHeader     c Keep-Alive: 115
   21 RxHeader     c Connection: keep-alive
   21 RxHeader     c Referer: http://indymedia.org.nz/node/78063/edit
   21 RxHeader     c Cookie: comment_info_name=Tester;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx; has_js=1
   21 RxHeader     c Content-Type: multipart/form-data;
boundary=---------------------------84863282515329900481602423677
   21 RxHeader     c Content-Length: 17019
   21 VCL_call     c recv
   21 VCL_return   c pass
   21 VCL_call     c pass
   21 VCL_return   c pass
   21 Backend      c 15 default default
   15 TxRequest    b POST
   15 TxURL        b /node/78063/edit
   15 TxProtocol   b HTTP/1.1
   15 TxHeader     b Host: indymedia.org.nz
   15 TxHeader     b User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS
X 10.6; en-GB; rv:1.9.2) Gecko/20100115 Firefox/3.6
   15 TxHeader     b Accept:
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
   15 TxHeader     b Accept-Language: en-gb,en;q=0.5
   15 TxHeader     b Accept-Encoding: gzip,deflate
   15 TxHeader     b Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
   15 TxHeader     b Referer: http://indymedia.org.nz/node/78063/edit
   15 TxHeader     b Cookie: comment_info_name=Tester;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx;
SESSxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=xxxxxxxxxxxxxxxxxxxxxxxxxxxxx; has_js=1
   15 TxHeader     b Content-Type: multipart/form-data;
boundary=---------------------------84863282515329900481602423677
   15 TxHeader     b Content-Length: 17019
   15 TxHeader     b X-Forwarded-For: 125.236.128.219
   15 TxHeader     b X-Varnish: 561007510
   15 TxHeader     b X-Forwarded-For: 125.236.128.219
   15 BackendClose b default
   21 VCL_call     c error
   21 VCL_return   c deliver
   21 Length       c 465
   21 VCL_call     c deliver
   21 VCL_return   c deliver
   21 TxProtocol   c HTTP/1.1
   21 TxStatus     c 503
   21 TxResponse   c Service Unavailable
   21 TxHeader     c Server: Varnish
   21 TxHeader     c Retry-After: 0
   21 TxHeader     c Content-Type: text/html; charset=utf-8
   21 TxHeader     c Content-Length: 465
   21 TxHeader     c Date: Fri, 29 Jan 2010 23:22:15 GMT
   21 TxHeader     c X-Varnish: 561007510
   21 TxHeader     c Age: 2
   21 TxHeader     c Via: 1.1 varnish
   21 TxHeader     c Connection: close
   21 ReqEnd       c 561007510 1264807333.799563885 1264807335.335580826
3.151196718 1.535988092 0.000028849
   21 SessionClose c error
   21 StatSess     c 125.236.128.219 53669 35 1 9 0 5 4 4595 137808
    0 StatAddr     - 125.236.128.219 0 2395 45 114 0 53 61 58675 1768498

On 29/01/10 11:26 PM, Tollef Fog Heen wrote:
> ]] Torrance 
>
> | I am running a drupal site behind Varnish and when posts or comments are
> | submitted there's about a 50/50 chance the user will get one of
> | Varnish's 503 error pages. These errors aren't after waiting a little
> | while or even a few seconds - they are returned with no delay
> | whatsoever. I can only presume that this is somehow linked to the fact
> | that these are POST requests, as the errors do not come up at any other
> | time.
>
> If you can capture a varnishlog from a good and a failing request, that
> might shed some light on what's going on.
>
>   

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