Back up Customized Files and the Domain
Before you start the upgrade, it is recommended that you create backup copies of any custom files you may have added to the Oracle Home. This might include, but is not limited to, custom Java JAR files and image files.
It is also recommended that the entire domain (for example, <user_projects>/domains
) and its applications (for example, <user_projects>/applications
) directories be copied and stored at least until it can be confirmed that the new installation is fully functional.
Note:
This new release contains numerous updates to settings that also existed in earlier versions with different values. Do not change setting values created by the installation unless you fully understand the impact of such changes. It also contains new entries that should not be removed.
Also, some changes may not be recognized until the servers have been restarted.