Hi Ryan
Some things to check in a multi machine setup
1. check if the machines are on the same subnet. ifconfig -a should show
the ip address of both the machines to be on the same subnet.
2. On Linux/Unix,
ifconfig -a should show the MULTICAST attribute present for your
network interface. Also ensure that the interface is in up and running
state.
If multicast is not enabled, you can use
ifconfig <interfacename> multicast
to enable it
On Windows, open Regedit and look for HKEY_LOCAL_Machine > SYSTEM >
CurrentControlSet > Services > Tcpip > Parameters.
Look for the parameter TrFunctionalMcastAddress and see if the value is
set to 0. If its not set to 0, set it to 0.
**3. In your multi machine setup, look in the server.log file if you
have entries that show phases such as ADD_EVENT or MASTER_CHANGE_EVENT.
And in the log line above it see if both the instances are present. This
could be a symptom of multicast not being enabled or not being on the
same subnet.
4. Also ensure your /etc/hosts file has your ip mapped to your machine.
hth
Shreedhar
Asleson, Ryan wrote:
> I run through a wizard in the application, and at the end of the wizard
> (on a summary screen) I shut down the instance that has been servicing
> the wizard up until now. I then navigate backwards through the wizard
> screens (using an app-define "Back" button, not the browser back button)
> and I should see the values that I entered the first time through the
> wizard.
>
> It works when the instances are on the same computer, but not when the
> instances are on different computers. I'm sure there's some sort of
> configuration I have set up incorrectly, but I don't know what.
>
>
>
> -----Original Message-----
> From: Peter.Fabian_at_Sun.COM [mailto:Peter.Fabian_at_Sun.COM]
> Sent: Monday, February 11, 2008 2:50 PM
> To: users_at_glassfish.dev.java.net
> Subject: Re: Enable Session Memory Replication
>
> Asleson, Ryan wrote:
>
>>
>> Thank you Larry!
>>
>> I'm part way there. I undeployed the application from Glassfish and
>> redeployed it (all from the online admin console) while sure to check
>> "Availability" during deployment. Session replication and failover
>> now works on a cluster where the cluster instances reside on the same
>> computer. So, I think the configuration is working.
>>
>> However, when I tweak the web server to point to a cluster where the
>> two instances are on different computers, the session replication and
>> failover doesn't work. Same application.
>>
>> Any idea why? Is there something I can check to help me figure it
>>
> out?
>
>>
>>
> how do you test the replication?
> Peter
>
>
> --
> Peter Fabian
> Sun Software
>
> AIM/skype:fabianpetergabor
> Sun corp IM:pf120168_at_sun.com
>
>
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