Re: Applications, Subnets and Multicasting Question

On Jul 11, 2005, at 10:25 AM, Ken Hammer wrote:

>  Chad, I bet you don't see the same error is because your
> Apache server has an address on both subnets. Thanks for
> the help.
>

Yes, probably it, but interestingly, the apache server is running in  
a FreeBSD "jail" and the jail only has the public address in it.  But  
the base HW machine has addresses in both subnets

Chad


>
> On Fri, 2005-07-08 at 17:08 -0600, Chad Leigh wrote:
>
>> 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
>>
>>
>>> _______________________________________________
>>> WebObjects-admin mailing list
>>> [email protected]
>>> http://www.omnigroup.com/mailman/listinfo/webobjects-admin
>>>
>>>
>>
>>
>>
>>
> -- 
> Ken Hammer
> Web Applications & Technologies Services
> University of Michigan
>
>