Re: traffic still going to backends marked as DOWN

From: Rupert Fiasco <>
Date: Thu, 11 Sep 2008 16:36:27 -0700

Please excuse my ignorance. There were some extenuating circumstances which clearly accounted for this behavior and haproxy is functioning correctly.


On Thu, Sep 11, 2008 at 4:00 PM, Rupert Fiasco <> wrote:
> We have the following setup:
> nginx -> haproxy ( -> mongrels
> Config is here:
> Problem: after I start haproxy and then immediately go to the web
> stats it will start checking each backend in turn and when it gets to
> backend 6 and 8 mark them as down. However, in looking at the logs
> traffic is STILL being sent to those mongrels and they are serving it
> up successfully.
> How can this be the case? From my understanding, if haproxy marks a
> server as down then it will never send traffic to it. Yet, traffic is
> being sent (and successfully handled) to that backend...
> Is there something wrong with my config? In this case, it seems a
> couple of things are going that are odd to me:
> 1) Why is haproxy marking it as down
> 2) If haproxy does consider it down (for whatever reasons), why is
> traffic still being sent to it
> Now, notice I have chosen to use a TCP check and not an HTTP check
> (since we have other background monitoring agents to actually restart
> a downed service). If I move to an HTTP check that *might* solve
> question #1, but doesnt answer #2.
> Thanks in advance
> - Rupert
Received on 2008/09/12 01:36

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