RE: "option httpchk" is reporting servers as down when they're not

Hi Willy,

Hm, changing to "60s" for each gave me 100% 504 errors, I removed all three. Bad idea, I know, but at least it works then.

I'm running 1.2.18 because the HAProxy homepage calls it the Latest version.

I've removed all cookies from this IP, cleared my cache, and still it seems that only one server is being hit. But the stats page reports an equal distribution, so it's anybody's guess. What would be a simple way to log the distribution? I find it difficult to determine this even in debug mode (I'm running the proxy in daemon mode, of course).

Thanks,
Thomas Allen
Web Developer, ASCE
703.295.6355

-----Original Message-----
From: Willy Tarreau [mailto:w#1wt.eu]
Sent: Monday, March 09, 2009 4:58 PM
To: Allen, Thomas
Cc: Jeffrey 'jf' Lim; haproxy#formilux.org Subject: Re: "option httpchk" is reporting servers as down when they're not

On Mon, Mar 09, 2009 at 04:15:34PM -0400, Allen, Thomas wrote:
> I used the unit 'S' for my timeouts, as in
>
> clitimeout 60S
> contimeout 60S
> srvtimeout 60S
>
> Is that to be avoided? I assumed it meant "seconds."

OK it's just a minor problem. You have to use a lower-case "s" : 60s. It's stupid that the parser did not catch this mistake. I should improve it. By default, it ignores unknown chars, you you clearly had 60 ms here.
BTW, there's no use in setting large contimeouts. You should usually stay
with lower values such as 5-10s. Oh BTW, what version are you running ? Your stats page looks old. The time units were introduced in 1.3.14, so I hope you're at least at this level.

> I'm using roundrobin and adding the httpclose option. I've been using
> cookie stickiness (which will be important for this website), but
after
> disabling this stickiness, I get the same results. I tried clearing
out
> the server cookie before and opening the page in multiple browsers,
and
> still got these results.

Then it is possible that haproxy could not manage to connect to your server in 60ms, then immediately retried on the other one, and sticked to that one.

Regards,
Willy Received on 2009/03/09 22:20