Customization Archive

MAS 9.1 moved the JVM under every Maximo customization from Java 11 to Java 17. MAS 9.2 (June 2026) adds Java 25 at the platform and AI-Service level while Java 17 stays the baseline for Manage and your custom code. Here is what changes for existing extensions, why 9.2 is a mixed Java-17/Java-25 environment, how to test and remediate, and why the extension model endured while everything around it modernized.

Venkat AchantaJul 15, 2026Part 6 of 6

How Maximo add-ons are activated in the MAS Manage component model, and how custom Java is now delivered as a Customization Archive baked into a container image on OpenShift instead of dropped into WebSphere — the old-world/MAS-world post for developers and upgrade teams.

Venkat Achanta

A developer's deep dive into how IBM Maximo add-ons and industry solutions extend the core through Java — PLUS prefixes, MBO inheritance chains, product.xml, bytecode injection, the compatibility matrix, the MAS 9 Customization Archive, and the Java 17 shift.

Venkat Achanta