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From Fran Boon <>
Subject Re: [users@httpd] proxy:ajp 'client denied by server configuration' when too many simultaneous requests happen
Date Fri, 18 Feb 2011 22:11:33 GMT
On 18 February 2011 22:04, Eric Covener <> wrote:
> On Fri, Feb 18, 2011 at 5:01 PM, Fran Boon <> wrote:
>> 2011/2/18 Igor Galić <>:
>>> ----- Original Message -----
>>>> httpd error log:
>>>> client denied by server configuration:
>>>> proxy:ajp://localhost:8009/geoserver/gwc/service/wms
>>>> This happens under 'high' load only (pages usually display
>>> How high? Are we talking high demand, or high CPU?
>> Concurrent requests.
>> If I fire off 10 requests, then say the 1st 4 respond OK, & then the
>> following 6 fail with the 403 'Forbidden'
> Running third-party modules that limit these things?

Good catch!

Seems like it was mod_evasive which was causing the problems - had
been installed by a colleague to secure against DoS attacks, but
inevitably gives problems with legitimate traffic trying to make
simultaneous requests.

Explains exactly both why it was so erratic in behaviour & why I
couldn't see other people having these problems!

/me crawls into a hole in shame...

Many thanks for your help - makes a world of difference :)


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