javadoc error when building with JDK11 -------------------------------------- Key: JBTM-3271 URL: https://issues.redhat.com/browse/JBTM-3271 Project: JBoss Transaction Manager Issue Type: Bug Components: Build System Affects Versions: 5.10.3.Final Reporter: Michael Musgrove Priority: Major Fix For: 5.next When we build using JDK11 we get javadoc errors. For example building ArjunaCore/arjunacore: bq. javadoc: error - The code being documented uses modules but the packages defined in https://docs.oracle.com/javase/8/docs/api/ are in the unnamed module. More context is here: https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8212233 A fix is to configure the javadoc plugin (org.apache.maven.plugins:maven-javadoc-plugin) to use <source>8</source> in the plugin configuration section.