Sometimes SPDY/2, Sometimes SPDY/3.1?

[Maxim Dounin]

Hello!

On Tue, Feb 11, 2014 at 09:59:52AM -0500, mevans336 wrote:

> Hello Everyone,
> 
> We have been running SPDY/2 for months and months without issue and recently
> upgraded to 1.5.10 for SPDY/3.1 support. However, we are having an issue
> where sometimes our site reports SPDY/2 and sometimes it reports SPDY/3.1 in
> Chrome's net-internals and the Chrome spdy extension. We use Nginx in
> reverse proxy mode and have 4 servers blocks - 2 for HTTP which redirect to
> 2 for HTTPS (a production block and a dev block). Both blocks experience the
> same behavior.

Either you have more than one server, or you've forgot to stop old 
nginx master process during upgrade.

http://nginx.org/en/docs/control.html#upgrade

-- 
Maxim Dounin
http://nginx.org/