JAXB was removed from Java 9+. In 2.164, JAXB was detached into the JAXB API plugin, which means that any plugin with a Jenkins baseline prior to 2.164 will get JAXB on its classpath via the detached plugin mechanism. Any plugin with a Jenkins baseline greater than or equal to 2.164 will get JAXB on its classpath if and only if it declares a plugin-to-plugin dependency on JAXB (recommended) or embeds JAXB into its own .jpi via a direct or transitive dependency.

A systematic search of the plugin corpus was conducted on May 9, 2022; this search revealed that this plugin has a baseline greater than or equal to 2.164, a direct or transitive usage of JAXB, no plugin-to-plugin dependency on JAXB, and no copy of JAXB in the .jpi. The recommendation for this plugin is to switch from JAXB to Java's built-in Base64 class for Base64 encoding/decoding.

This plugin's identified usage of JAXB is as follows:

Plugin notification:1.15 using javax/xml/bind/DatatypeConverter via com/tikal/hudson/plugins/notification/Protocol$3.class