How the Installer Checks for Preexisting Components

During installation, the Java ES installer surveys the software that is already installed on the host where you are installing and identifies the following:

• Compatible Java ES product components

  Compatible product components do not need to be reinstalled and will not be available for selection in the installer.

• Incompatible Java ES product components

  If the installer identifies incompatibilities between product components you have selected and product components that are already installed locally, you will need to remove or upgrade the incompatible installed product components. On Solaris OS, some bundled components can be upgraded by the installer (Application Server, Message Queue, HADB). Other incompatible components will need to be removed or upgraded manually. The installer cannot continue until these incompatibilities are resolved. For more information, refer to How Upgrading Works.

• Incompatible Java ES shared components

  It is not uncommon for existing hosts to already contain versions of Java ES shared components, such as NSS. If the installer finds shared components whose version is incompatible with the version of Java ES you are installing, those shared components are listed. If you proceed with installation, the installer automatically upgrades the shared components to compatible versions.