If you want 99.999% availability of your Glassfish cluster then you should do 2 things: 1. Use HADB for user HTTP and Session persistence, 2. get some SUN support. I cannot help you with the decision on point 2, but with point 1 I will show you how to doit.In this article I will NOT start again to show you how to configure a Glassfish cluster, because this is already made in this article. Today I will present how to add HADB functionality to a existent Glassfish cluster.

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Again some problems with glassfish cluster. If in Glassfish v2UR2 all was ok in Glassfish 2.1 we had some problems. This post is based on How to install and configure a Glassfish cluster
my early article. So first part of installing the cluster, first server with DAS and all the stuff is working perfectly, but second part when we need to add more instances we get some problems. Following the steps to add a new instance on the cluster we get an error:

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I get this error in the morning and eat me 1 hour from my life. I tried to install a glassfish on a new server (installed by some other third party) and ant finished with this error:

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This article is the second part from a serie of 2 articles about glassfish and liferay. I hope you will find this articles very useful. First article is here.

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If you are looking for Glassfish 3.1 Cluster installation then go here: Installing a Glassfish 3.1 Cluster on Debian 6.0 only from command line

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