Now that GlassFish 3.1.2 has been released, you may be wondering about what your upgrade options are. As a reminder, this release is highly-compatible with previous ones and should be a target for any existing GlassFish user.
Technically-speaking version 3.1.2 is also known as 3.1.1-patch#4 and 3.1-patch#5, thus making the migration path pretty obvious for 3.1. and 3.1.1 users.
We are not forgetting users of older versions with these additional supported upgrade options :
• 2.x → 3.1.2: side-by-side install + domain upgrade
• 3.0.x → 3.1.2: side-by-side install + domain upgrade or update via update-center + domain upgrade
For a 3.1.x → 3.1.2 upgrade you can to a side-by-side install, update via update-center with no required domain upgrade (configuration is compatible with 3.1.x).
The upgrade of v2 clusters can be done with :
• side-by-side install of 3.1.2 on DAS and instance hosts
• Migrate v2 domain to 3.1.2 on DAS host + recreation of instances
In-place upgrades are not supported through the installer though. For all the details, make sure you read the dedicated "Upgrade Guide" documentation.