Hi,

On Wed, Mar 26, 2014 at 10:13:37AM +0100, Lukas Tribus wrote:
> Hi,
> 
> 
> > I am using 1.5-dev21-6b07bf7. The haproxy process was running, the web 
> > gui was responding. According to the web gui, all the backends were up, 
> > and I restarted all backend services to make sure as well. 
> > 
> > When I send connections to the front-end, TCP connection was 
> > established to haproxy, and then stuck - clearly not forwarded to the 
> > backend servers. After restarting haproxy everything started to work 
> > again.
> 
> 
> Next time, please:
> - make screenshots of the webgui or better yet, export the csv
> - check CPU usage on the HAproxy box (is haproxy draining a lot of CPU)?
> 
> 
> Are you sure you didn't just hit some of the maxconn limits and HAproxy
> queued the request?
> 
> Did you wait for 30 seconds (your queue timeout) to see if HAproxy returns
> an error?

Other ideas that come to mind :
  - a very long queue in a backend or server causing each request to wait
    for all other ones to be processed ;

  - a bug in dev21 which was got rid of with the polling rewrite that went
    in dev22.

Regards,
Willy


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