Pipe issue

[Dridi Boukelmoune]

Hi,

Please find attached a test case that reproduces the behaviour.

Here's what happens for c2:

$ varnishtest -v 1pipe.vtc | awk '{ if ($2 == "c2") print}'
**   c2    0.4 Starting client
**   c2    0.4 Waiting for client
**   c2    0.4 Started (5 iterations)
***  c2    0.4 Connect to 127.0.0.1 34647
***  c2    0.4 connected fd 10 from 127.0.0.1 45762 to 127.0.0.1 34647
***  c2    0.4 txreq
**** c2    0.4 txreq| GET / HTTP/1.1\r\n
**** c2    0.4 txreq| \r\n
***  c2    0.4 rxresp
---- c2    0.4 HTTP rx EOF (fd:10 read: Success)

Should I file an issue in trac? It doesn't feel right.

Best Regards,
Dridi

On Tue, May 19, 2015 at 2:36 PM, jérémy HAGE <hage.jeremy at gmail.com> wrote:
> Hello,
>
> I am encountering an issue with varnish and pipes. When the number of
> backend connections achieves max_connections, varnish doesn't send any data.
>
> The error message from curl is "curl: (52) Empty reply from server". That
> seems to be a bug because, in my opinion Varnish is supposed to reply a 503
> error at least.
>
> It is easy to reproduce. I installed the official debian package (wheezy) of
> varnish 4. Then I put this little configuration.
>
> vcl 4.0;
> backend default {
>     .host = "127.0.0.1";
>     .port = "80";
>     .max_connections = 1;
> }
>
> sub vcl_recv {
>     return (pipe);
> }
>
> Then I made 2 simultaneous connections. To make it as simplest as possible,
> I installed Apache as backend with mod_php and I added a script which only
> makes a "sleep(10)". When I make 2 curl simultaneously, the second gives me
> this error "curl: (52) Empty reply from server" .
>
> Is it an expected behavior?
>
> Best regards,
> --
> Jérémy HAGE
>
>
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