In the old versions of Liferay, switching from HSQL to MySQL was easy under Glassfish. Just replace the jdbc connector created for HSQL with one for MySQL and at the next restart of Liferay all was working ok. From version 5.2.1 configuration was changed and all is done from portal.properties. To switch from HSQL just create a portal-ext.properties with the following content:

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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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As you know, under linux, you can have multiple application versions  (you can have 2 C++ compilers, or 4 java runtimes ) in the same time on your system.

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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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