Re: Applications, Subnets and Multicasting Question

On Jul 7, 2005, at 1:46 PM, Ken Hammer wrote:

> Hi,
>  I know there was much discussions about this in the archives,
> but I believe this is a slightly different issue with the subnet
> and multicasting.
>  I have 2 application servers running the same application on
> different subnets. This is WebObjects version 5.2.3 on Solaris
> 2.8. The web server (Apache 1.3.31) is on a different machine but on
> the same subnet as on of the application servers. So the setup is
> like this:
> App server: app1.net1.x.x.x
> App server: app2:net2.x.x.x
> WebServer:  web1.net1.x.x.x
>
> The WebObjectsConfig parameter looks like this:
> WebObjectsConfig http://app1.net1.x.x.x:1085,http://app2.net2.x.x.x: 
> 1085
> 60
>
> We had users experience intermittent "Application Not Found"  
> errors. One
> minute they'd be working, next they'd get the error.
> It was corrected by making a second machine app3.net1.x.x.x and  
> removing
> the reference to app2.net2.x.x.x in the WebObjectsConfig parameter.
>

I am not sure if what we do is the same but we have the same app  
running on two different HW servers, who are on different subnets,  
with apache being in the same net as one of the app servers.  This is  
with 5.2.x (various values of x and 5.1), on FreeBSD and Linux.   
However, the apache HW server has addresses in both of the subnets so  
that might be why we have no problems.

Our WebObjectsConfig line looks similar to yours for our various  
apaches.

Most of our WO servers are on private 192.168 nets but we also run  
some (small number) of instances on the apache machine for redundancy

Chad
shire.net

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