A few users see a blank page

[Christophe Husson]

Hi,

I've allready send a bug report for this problem one month ago : 
http://varnish.projects.linpro.no/ticket/197


Marco Molinari a écrit :
> On Feb 13, 2008 4:33 PM, Dag-Erling Smørgrav <des at linpro.no> wrote:
>   
>> You are doing weird things such as inserting passed requests into the
>> cache, yet none of the requests you showed were cache hits.
>>
>> Re the second request from your log, where the client got an empty
>> page: that was actually what the backend sent.
>>     
>
> Hi,
> actually Apache logged it sent 8001 bytes:
> 127.0.0.1, 10.0.2.2 - - [12/Feb/2008:14:24:29 +0100] "GET
> /test_varnish2.php?n=11&t=1202822659 HTTP/1.0" 200 8001 "-"
>
>
>   
>> There is no way to debug this further without seeing your vcl script.
>>     
>
>
>
> Here the vcl I posted, which was the one I was using:
>
> backend default {
>        set backend.host = "127.0.0.1";
>        set backend.port = "8080";
> }
>
> sub vcl_recv {
>        if (req.http.Pragma == "no-cache") {
>                pipe;
>        }
>
>        if (req.request == "GET" && req.url ~
> "\.(gif|jpg|swf|css|js|swf|flv|png|jpeg)$") {
>                lookup;
>        }
>
>        if (req.request != "GET" && req.request != "HEAD") {
>                pipe;
>        }
>
>        if (req.http.Expect) {
>                pipe;
>        }
>
>        if (req.http.Authenticate || req.http.Cookie) {
>                pass;
>        }
>
>        lookup;
> }
>
>
> Today I changed the last "pass" into "pipe" (in the req.http.Cookie
> part) and both I and my complaining users get no blank pages anymore
> (Arne, I remember you wrote you tried both pipe and pass, but did you
> try this?)
>
> To sum this up, I get a blank page if all of these happen:
> - I use a Squid 2.5 or 2.6 proxy
> - and the content is generated by php
> - and the content is more than 8000 bytes
> - and the cookie header is quite long (about 500 chars)
> - and if (req.http.Cookie) {pass} in vcl
>
> thanks
> Marco
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>