SPDY + proxy cache = occasional 499 errors

Valentin V. Bartenev vbart at nginx.com
Mon Dec 3 13:14:05 UTC 2012

On Sunday 02 December 2012 03:48:52 spdyg wrote:
> Hi there,
> I have been piloting the SPDY patch on a separate web server pointing to an
> existing HTTP backend.
> With just myself using this pilot web server, occasionally static resources
> such as css or images are not loading in Firefox (usually when pressing F5
> to reload a page)
> Have done a bit of digging and have learnt this so far:
> When issue occurs in Firefox, access log is showing 499 errors for the
> missing static resources (when it should be 304)
> Refreshing the page will eventually load the resources (and they will show
> 304 in the access log)
> If I turn off the proxy cache for these static resources, the issue stops
> If I turn off SPDY, the issue stops.
> The issue obviously doesn't occur on the production web server running
> Nginx 1.2.x
> Has this been seen before, or can you think of any reason why this might
> happen?

Thank you for testing. There is a reason for this in current spdy 
implementation. I'm working on it.

 wbr, Valentin V. Bartenev


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