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Oracle does not make security updates (CPU) for products that old.
The final CPU for 10.3.4 was April 2012:
You can upgrade to 10.3.6 without any problems. I have not tried to upgrade to 12c yet, only tried new installations on 12c. I would not expect that there should be any big issues upgrading Weblogic 10.3.4 to 12c.
Do notice that FMW products is not supported on 12c. So if you use any FMW product you can only upgrade to 18.104.22.168/Weblogic 10.3.6.
Edited by: Peter Lorenzen . on Feb 20, 2013 12:25 AM
Thanks for the updates. I would like to know the following components impacts during upgrade/migration. We have more than 20 managed servers in each environment. So it is kind of hard to setup a sand box as we have OAM SSO. The impact would be high for us.
* JDBC drivers (we use Generic, Grid link, and Multi data sources)
* Security (We use weblogic security providers).
* JVM, Java, and Permsize parameters
* JDK compatibility
thanks in advance for updates.