Varnish drops connections and make several HTTP 206

[Kurt Kraut]

Hi,

What I'm reporting is not true HTTP 206 requests for resuming downloads or
genuine HTTP clients requesting for these. The logs I provide below of wget
and cURL shows that Varnish is deliberately dropping connections, forcing
the HTTP client to attempt to resume the download. So the HTTP is a
consequence of a issue generated by Varnish. This started to affect me on
version 3.0 and currently in 3.0.1

Bellow is a URL containing a full output log for the command wget --verbose
http://varnish.kurtkraut.net/1GBtest.zip

Pastebin: http://pastebin.com/hfYRhKq7

Also, the output of cURL: http://pastebin.com/CuMr3mbp

You may reproduce the issue trying to download
http://varnish.kurtkraut.net/1GBtest.zip - I will leave this URL online for
the next weeks.

What do you think? Is it a bug?

Thanks,


Kurt Kraut

2011/10/7 Tollef Fog Heen <tfheen at varnish-software.com>

> ]] Kurt Kraut
>
> | I've already reported this on Varnish 3.0 and I waited to test it on
> Varnish
> | 3.0.1 and the behaviour is the same. The majority of HTTP GET of files
> | larger than 1mb are constantly interrupted and restarted with HTTP 206.
> Here
> | is a sample collected from varnishncsa:
>
> 206 is «Partial Content» which we send if we get a request with Range
> headers.
>
> | This was an iPhone watching a MP4 video, but this also happens with curl,
> | wget, Firefox, anything I've tested.
>
> Can you please provide varnishlog + command line from a run with curl
> that shows the problem?
>
>
> [...]
>
> | 3) Does anyone suggest a workaround for this?
>
> sub vcl_recv {
>  unset req.http.Range;
> }
>
> that'll increase the amount of bandwidth clients are consuming, though.
>
> Cheers,
> --
> Tollef Fog Heen
> Varnish Software
> t: +47 21 98 92 64
>
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