Answer: Before running the installer, verify that the hosts on which you will be installing are set up correctly. System requirements are listed in the following release notes:
Operating system patches might be missing from your host, in which case the installer will not be able to proceed. For information on what to do about missing patches, see Q26: How do I get patches that the installer indicates are missing?
Solaris OS Patch Clusters Refer to the Sunsolve patch cluster page to see the recommended Java ES patch clusters. Information on patch clusters is provided in System Requirements in Sun Java Enterprise System 5 Installation Guide for UNIX. Because the patch cluster installs all patches required for any of the Java ES components, you might want to install the Java ES required OS patch cluster before installation. However, if you prefer to install only the patches required for the specific components you select, you can let the Java ES installer tell you exactly which patches are needed.
A number of situations exist that might require preinstallation tasks for your particular combination of components. Be sure that relevant installation prerequisites are met before starting your installation. See Verifying Installation Prerequisites in Sun Java Enterprise System 5 Installation Guide for UNIX.