Updating and uninstalling Liberty on z/OS

You can use IBM® Installation Manager to update or uninstall the WebSphere® Application Server for z/OS® Liberty offering.

Important: Liberty on z/OS supports Java™ SE 8.

As of version 22.0.0.9, Liberty on z/OS supports Java SE 11.

As of version 23.0.0.12, Liberty on z/OS supports Java SE 17.

When support ends for your Java SE version, you must upgrade to a supported version.

The Liberty end of support date for Java SE 8 is October 2026, fix pack 26.0.0.10.
The Liberty end of support date for Java SE 11 is October 2026, 26.0.0.10.
The Liberty end of support date for Java SE 17 is October 2027, 27.0.0.10.

For more information, see Removal notices. After support is removed, the Liberty kernel is recompiled and can no longer run with the removed Java version.

Optional features

Certain features can be added or removed from an installed copy of the WebSphere Application Server for z/OS Liberty offering. These are called optional features. Choose the optional features for each copy of the WebSphere Application Server for z/OS Liberty code according to your needs.

See Adding and removing Liberty features on z/OS.

Maintenance

IBM regularly provides updates to the WebSphere Application Server for z/OS Liberty offering to fix defects and add new function. Fix packs contain bundled service to bring WebSphere Application Server for z/OS Liberty up to a new level. Interim fixes provide updates to correct individual defects. See Installing Liberty interim fixes and fix packs on z/OS operating systems .

New: Fix pack 16.0.0.2 is the next Liberty fix pack after 8.5.5.9. For more information about changes in Liberty fix pack numbering and delivery, see What is new in this release of Liberty.

Uninstalling the offering

You can use IBM Installation Manager to uninstall individual copies of WebSphere Application Server for z/OS Liberty offering code.

See Uninstalling Liberty offerings on z/OS.