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From Rainer Jung <>
Subject Re: mod_jk connection_pool_size property
Date Sat, 05 Aug 2006 16:58:48 GMT
Since you are using Apache 1.3: By theory setting the value to > 1 
should not be necessary. To understand what's going on: could you 
increase JkLogLevel to trace and send us parts of the output around a 
request producing a 503 error?

Java Rab wrote:
> I have setup load balancing between Apache 1.3.33 and Tomcat 4.0.6 using
> the mod_jk connector. Initial tests were fine and the balancing seemed to
> work a treat. However, with any load on the server, I was seeing 503 errors
> reporting server unavailability. To resolve this issue, I set the following
> property in the file: connection_pool_size=1000 which 
> has
> resolved the immediate problem and the system can now process a heavy load
> without failure.
> The only thing that troubles me, that's preventing me from claiming success
> is the following note in red highlighting in the apache documentation, 
> which
> can be viewed online at
> Extract: "Do
> not use connection_pool_size with values higher then 1 on *Apache 
> 2.xprefork
> * or *Apache 1.3.x*!". Can anyone explain the reason why this shouldnt be
> done? My system seems to work fine, but I'd be nervous going live with the
> configuration described above, without first understanding the warning in
> the apache docs.
> Any help will be great!
> JR

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Fax:  +49/0228/98549-50

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