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Asked: 2026-06-11T01:41:22+00:00

I’ve built a cluster on Glassfish administred via SSH, where there are 2 instances.

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I’ve built a cluster on Glassfish administred via SSH, where there are 2 instances. I deployed an application that shows the “Session id”.

This application has in the web.config:

<distributable/>

And in the sun-web.xml:

<session-config>
    <cookie-properties>
         <property name="cookieDomain" value="compute.amazonaws.com"/>
    </cookie-properties>
</session-config>

I enabled “Availability” in Edit Application.

But when I access the 2 web app versions I see different session ids.
Can anyone help me?

EDIT: As some users noticed, in EC2 is not supported multicast. A solution comes with Glassfish v3.1.2, that allows two other different ways to discover a cluster when multicasting is not permitted (by listing instances ip or making it auto-generate the list). Here’s specified how to start a cluster in a non-multicasting environment: Administering Glassfish Server Clusters

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1 Answer

  1. Editorial Team

    As some users noticed, in EC2 is not supported multicast. A solution comes with Glassfish v3.1.2, that allows two other different ways to discover a cluster when multicasting is not permitted (by listing instances ip or making it auto-generate the list). Here’s specified how to start a cluster in a non-multicasting environment: Administering Glassfish Server Clusters

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